com.android.leanlauncher.LauncherTransitionable.java Source code

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Here is the source code for com.android.leanlauncher.LauncherTransitionable.java

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/*
 * Copyright (C) 2015 Kumaresan Rajeswaran
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.leanlauncher;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.animation.PropertyValuesHolder;
import android.animation.TimeInterpolator;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.ActivityOptions;
import android.appwidget.AppWidgetHostView;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProviderInfo;
import android.content.ActivityNotFoundException;
import android.content.BroadcastReceiver;
import android.content.ComponentCallbacks2;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.database.ContentObserver;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Color;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.os.StrictMode;
import android.os.SystemClock;
import android.support.v4.util.ArrayMap;
import android.text.method.TextKeyListener;
import android.util.Log;
import android.view.HapticFeedbackConstants;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewAnimationUtils;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.view.accessibility.AccessibilityEvent;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
import android.view.inputmethod.InputMethodManager;
import android.widget.Advanceable;
import android.widget.Toast;

import com.android.leanlauncher.DropTarget.DragObject;
import com.android.leanlauncher.compat.AppWidgetManagerCompat;
import com.android.leanlauncher.compat.LauncherAppsCompat;
import com.android.leanlauncher.compat.UserHandleCompat;
import com.android.leanlauncher.compat.UserManagerCompat;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

interface LauncherTransitionable {
    View getContent();

    void onLauncherTransitionPrepare(Launcher l, boolean animated, boolean toWorkspace);

    void onLauncherTransitionStart(Launcher l, boolean animated, boolean toWorkspace);

    void onLauncherTransitionStep(Launcher l, float t);

    void onLauncherTransitionEnd(Launcher l, boolean animated, boolean toWorkspace);
}

/**
 * Default launcher application.
 */
public class Launcher extends Activity
        implements View.OnClickListener, OnLongClickListener, LauncherModel.Callbacks, View.OnTouchListener {
    public static final int EXIT_SPRINGLOADED_MODE_SHORT_TIMEOUT = 300;
    static final String TAG = "LeanLauncher";
    static final boolean LOGD = BuildConfig.DEBUG;
    static final boolean PROFILE_STARTUP = false;
    static final boolean DEBUG_WIDGETS = false;
    static final boolean DEBUG_STRICT_MODE = false;
    static final boolean DEBUG_RESUME_TIME = false;
    // The Intent extra that defines whether to ignore the launch animation
    static final String INTENT_EXTRA_IGNORE_LAUNCH_ANIMATION = "com.android.launcher3.intent.extra.shortcut.INGORE_LAUNCH_ANIMATION";
    static final int APPWIDGET_HOST_ID = 1024;
    private static final int REQUEST_CREATE_SHORTCUT = 1;
    private static final int REQUEST_CREATE_APPWIDGET = 5;
    private static final int REQUEST_PICK_SHORTCUT = 7;
    private static final int REQUEST_PICK_APPWIDGET = 9;
    private static final int REQUEST_PICK_WALLPAPER = 10;
    private static final int REQUEST_BIND_APPWIDGET = 11;
    private static final int REQUEST_RECONFIGURE_APPWIDGET = 12;
    // Type: int
    private static final String RUNTIME_STATE = "launcher.state";
    // Type: int
    private static final String RUNTIME_STATE_PENDING_ADD_CONTAINER = "launcher.add_container";
    // Type: int
    private static final String RUNTIME_STATE_PENDING_ADD_CELL_X = "launcher.add_cell_x";
    // Type: int
    private static final String RUNTIME_STATE_PENDING_ADD_CELL_Y = "launcher.add_cell_y";
    // Type: int
    private static final String RUNTIME_STATE_PENDING_ADD_SPAN_X = "launcher.add_span_x";
    // Type: int
    private static final String RUNTIME_STATE_PENDING_ADD_SPAN_Y = "launcher.add_span_y";
    // Type: parcelable
    private static final String RUNTIME_STATE_PENDING_ADD_WIDGET_INFO = "launcher.add_widget_info";
    // Type: parcelable
    private static final String RUNTIME_STATE_PENDING_ADD_WIDGET_ID = "launcher.add_widget_id";
    // Type: int[]
    private static final String RUNTIME_STATE_VIEW_IDS = "launcher.view_ids";
    private static final int ON_ACTIVITY_RESULT_ANIMATION_DELAY = 500;
    private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1);
    private static final int SINGLE_FRAME_DELAY = 16;
    private static LocaleConfiguration sLocaleConfiguration = null;
    private static PendingAddArguments sPendingAddItem;
    private final BroadcastReceiver mCloseSystemDialogsReceiver = new CloseSystemDialogsIntentReceiver();
    private final ContentObserver mWidgetObserver = new AppWidgetResetObserver();
    // Related to the auto-advancing of widgets
    private final int ADVANCE_MSG = 1;
    private final int mAdvanceInterval = 20000;
    private State mState = State.WORKSPACE;
    private AnimatorSet mStateAnimation;
    private boolean mIsSafeModeEnabled;
    private int[][] mItemIdToViewId = new int[0][0];
    private LayoutInflater mInflater;
    private Workspace mWorkspace;
    private View mLauncherView;
    private DragLayer mDragLayer;
    private DragController mDragController;
    private AppWidgetManagerCompat mAppWidgetManager;
    private LauncherAppWidgetHost mAppWidgetHost;
    private ItemInfo mPendingAddInfo = new ItemInfo();
    private AppWidgetProviderInfo mPendingAddWidgetInfo;
    private int mPendingAddWidgetId = -1;
    private int[] mTmpAddItemCellCoordinates = new int[2];
    private ViewGroup mOverviewPanel;
    private View mAllAppsButton;
    private AppsCustomizeTabHost mAppsCustomizeTabHost;
    private AppsCustomizePagedView mAppsCustomizeContent;
    private boolean mAutoAdvanceRunning = false;
    private Bundle mSavedState;
    // We set the state in both onCreate and then onNewIntent in some cases, which causes both
    // scroll issues (because the workspace may not have been measured yet) and extra work.
    // Instead, just save the state that we need to restore Launcher to, and commit it in onResume.
    private State mOnResumeState = State.NONE;
    private DeleteDropTargetBar mDeleteDropTargetBar;
    private boolean mWorkspaceLoading = true;
    private boolean mPaused = true;
    private boolean mRestoring;
    private boolean mWaitingForResult;
    private boolean mOnResumeNeedsLoad;
    private ArrayList<Runnable> mBindOnResumeCallbacks = new ArrayList<Runnable>();
    private ArrayList<Runnable> mOnResumeCallbacks = new ArrayList<>();
    private LauncherModel mModel;
    private IconCache mIconCache;
    private boolean mUserPresent = true;
    private boolean mVisible = false;
    private boolean mHasFocus = false;
    private boolean mAttached = false;
    private View.OnTouchListener mHapticFeedbackTouchListener;
    private long mAutoAdvanceSentTime;
    private long mAutoAdvanceTimeLeft = -1;
    private ArrayMap<View, AppWidgetProviderInfo> mWidgetsToAdvance = new ArrayMap<>();
    private int mLastOrientation;
    private final Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            if (msg.what == ADVANCE_MSG) {
                int i = 0;
                for (View key : mWidgetsToAdvance.keySet()) {
                    final View v = key.findViewById(mWidgetsToAdvance.get(key).autoAdvanceViewId);
                    int advanceStagger = 250;
                    final int delay = advanceStagger * i;
                    if (v instanceof Advanceable) {
                        postDelayed(new Runnable() {
                            public void run() {
                                ((Advanceable) v).advance();
                            }
                        }, delay);
                    }
                    i++;
                }
                sendAdvanceMessage(mAdvanceInterval);
            }
        }
    };
    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (Intent.ACTION_SCREEN_OFF.equals(action)) {
                mUserPresent = false;
                mDragLayer.clearAllResizeFrames();
                updateRunning();

                // Reset AllApps to its initial state only if we are not in the middle of
                // processing a multi-step drop
                if (mAppsCustomizeTabHost != null && mPendingAddInfo.container == ItemInfo.NO_ID) {
                    showWorkspace(false);
                }
            } else if (Intent.ACTION_USER_PRESENT.equals(action)) {
                mUserPresent = true;
                updateRunning();
            } else if (LauncherAppsCompat.ACTION_MANAGED_PROFILE_ADDED.equals(action)
                    || LauncherAppsCompat.ACTION_MANAGED_PROFILE_REMOVED.equals(action)) {
                getModel().forceReload();
            }
        }
    };
    private Drawable mWorkspaceBackgroundDrawable;
    private BubbleTextView mWaitingForResume;
    private Runnable mBuildLayersRunnable = new Runnable() {
        public void run() {
            if (mWorkspace != null) {
                mWorkspace.buildPageHardwareLayers();
            }
        }
    };
    /**
     * A number of packages were updated.
     */
    private ArrayList<Object> mWidgetsAndShortcuts;
    private Runnable mBindPackagesUpdatedRunnable = new Runnable() {
        public void run() {
            bindPackagesUpdated(mWidgetsAndShortcuts);
            mWidgetsAndShortcuts = null;
        }
    };

    private static void readConfiguration(Context context, LocaleConfiguration configuration) {
        DataInputStream in = null;
        try {
            in = new DataInputStream(context.openFileInput(LauncherFiles.LAUNCHER_PREFERENCES));
            configuration.locale = in.readUTF();
            configuration.mcc = in.readInt();
            configuration.mnc = in.readInt();
        } catch (FileNotFoundException e) {
            // Ignore
        } catch (IOException e) {
            // Ignore
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    // Ignore
                }
            }
        }
    }

    private static void writeConfiguration(Context context, LocaleConfiguration configuration) {
        DataOutputStream out = null;
        try {
            out = new DataOutputStream(context.openFileOutput(LauncherFiles.LAUNCHER_PREFERENCES, MODE_PRIVATE));
            out.writeUTF(configuration.locale);
            out.writeInt(configuration.mcc);
            out.writeInt(configuration.mnc);
            out.flush();
        } catch (FileNotFoundException e) {
            // Ignore
        } catch (IOException e) {
            //noinspection ResultOfMethodCallIgnored
            context.getFileStreamPath(LauncherFiles.LAUNCHER_PREFERENCES).delete();
        } finally {
            if (out != null) {
                try {
                    out.close();
                } catch (IOException e) {
                    // Ignore
                }
            }
        }
    }

    public static int generateViewId() {
        if (Build.VERSION.SDK_INT >= 17) {
            return View.generateViewId();
        } else {
            // View.generateViewId() is not available. The following fallback logic is a copy
            // of its implementation.
            for (;;) {
                final int result = sNextGeneratedId.get();
                // aapt-generated IDs have the high byte nonzero; clamp to the range under that.
                int newValue = result + 1;
                if (newValue > 0x00FFFFFF)
                    newValue = 1; // Roll over to 1, not 0.
                if (sNextGeneratedId.compareAndSet(result, newValue)) {
                    return result;
                }
            }
        }
    }

    /**
     * Given the integer (ordinal) value of a State enum instance, convert it to a variable of type
     * State
     */
    private static State intToState(int stateOrdinal) {
        State state = State.WORKSPACE;
        final State[] stateValues = State.values();
        for (State stateValue : stateValues) {
            if (stateValue.ordinal() == stateOrdinal) {
                state = stateValue;
                break;
            }
        }
        return state;
    }

    static int[] getSpanForWidget(Context context, ComponentName component, int minWidth, int minHeight) {
        Rect padding = AppWidgetHostView.getDefaultPaddingForWidget(context, component, null);
        // We want to account for the extra amount of padding that we are adding to the widget
        // to ensure that it gets the full amount of space that it has requested
        int requiredWidth = minWidth + padding.left + padding.right;
        int requiredHeight = minHeight + padding.top + padding.bottom;
        return CellLayout.rectToCell(requiredWidth, requiredHeight, null);
    }

    static int[] getSpanForWidget(Context context, AppWidgetProviderInfo info) {
        return getSpanForWidget(context, info.provider, info.minWidth, info.minHeight);
    }

    static int[] getMinSpanForWidget(Context context, AppWidgetProviderInfo info) {
        return getSpanForWidget(context, info.provider, info.minResizeWidth, info.minResizeHeight);
    }

    static int[] getSpanForWidget(Context context, PendingAddWidgetInfo info) {
        return getSpanForWidget(context, info.componentName, info.minWidth, info.minHeight);
    }

    static int[] getMinSpanForWidget(Context context, PendingAddWidgetInfo info) {
        return getSpanForWidget(context, info.componentName, info.minResizeWidth, info.minResizeHeight);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        if (DEBUG_STRICT_MODE) {
            StrictMode.setThreadPolicy(
                    new StrictMode.ThreadPolicy.Builder().detectDiskReads().detectDiskWrites().detectNetwork() // or .detectAll() for all detectable problems
                            .penaltyLog().build());
            StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectLeakedSqlLiteObjects()
                    .detectLeakedClosableObjects().penaltyLog().penaltyDeath().build());
        }

        super.onCreate(savedInstanceState);

        LauncherAppState.setApplicationContext(getApplicationContext());
        LauncherAppState app = LauncherAppState.getInstance();

        // Lazy-initialize the dynamic grid
        DeviceProfile grid = app.initDynamicGrid(this);

        mIsSafeModeEnabled = getPackageManager().isSafeMode();
        mModel = app.setLauncher(this);
        mIconCache = app.getIconCache();
        mIconCache.flushInvalidIcons(grid);
        mDragController = new DragController(this);
        mInflater = getLayoutInflater();

        mAppWidgetManager = AppWidgetManagerCompat.getInstance(this);

        mAppWidgetHost = new LauncherAppWidgetHost(this, APPWIDGET_HOST_ID);
        mAppWidgetHost.startListening();

        // If we are getting an onCreate, we can actually preempt onResume and unset mPaused here,
        // this also ensures that any synchronous binding below doesn't re-trigger another
        // LauncherModel load.
        mPaused = false;

        if (PROFILE_STARTUP) {
            android.os.Debug.startMethodTracing(Environment.getExternalStorageDirectory() + "/launcher");
        }

        checkForLocaleChange();
        setContentView(R.layout.launcher);

        setupViews();
        grid.layout(this);

        registerContentObservers();

        mSavedState = savedInstanceState;
        restoreState(mSavedState);

        if (PROFILE_STARTUP) {
            android.os.Debug.stopMethodTracing();
        }

        if (!mRestoring) {
            // We only load the page synchronously if the user rotates (or triggers a
            // configuration change) while launcher is in the foreground
            mModel.startLoader(true, 0);
        }

        IntentFilter filter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
        registerReceiver(mCloseSystemDialogsReceiver, filter);
    }

    private void checkForLocaleChange() {
        if (sLocaleConfiguration == null) {
            new AsyncTask<Void, Void, LocaleConfiguration>() {
                @Override
                protected LocaleConfiguration doInBackground(Void... unused) {
                    LocaleConfiguration localeConfiguration = new LocaleConfiguration();
                    readConfiguration(Launcher.this, localeConfiguration);
                    return localeConfiguration;
                }

                @Override
                protected void onPostExecute(LocaleConfiguration result) {
                    sLocaleConfiguration = result;
                    checkForLocaleChange(); // recursive, but now with a locale configuration
                }
            }.execute();
            return;
        }

        final Configuration configuration = getResources().getConfiguration();

        final String previousLocale = sLocaleConfiguration.locale;
        final String locale = configuration.locale.toString();

        final int previousMcc = sLocaleConfiguration.mcc;
        final int mcc = configuration.mcc;

        final int previousMnc = sLocaleConfiguration.mnc;
        final int mnc = configuration.mnc;

        boolean localeChanged = !locale.equals(previousLocale) || mcc != previousMcc || mnc != previousMnc;

        if (localeChanged) {
            sLocaleConfiguration.locale = locale;
            sLocaleConfiguration.mcc = mcc;
            sLocaleConfiguration.mnc = mnc;

            mIconCache.flush();

            final LocaleConfiguration localeConfiguration = sLocaleConfiguration;
            new AsyncTask<Void, Void, Void>() {
                public Void doInBackground(Void... args) {
                    writeConfiguration(Launcher.this, localeConfiguration);
                    return null;
                }
            }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
        }
    }

    boolean isDraggingEnabled() {
        // We prevent dragging when we are loading the workspace as it is possible to pick up a view
        // that is subsequently removed from the workspace in startBinding().
        return !mModel.isLoadingWorkspace();
    }

    /**
     * Returns whether we should delay spring loaded mode -- for shortcuts and widgets that have
     * a configuration step, this allows the proper animations to run after other transitions.
     */
    private void completeAdd(PendingAddArguments args) {
        switch (args.requestCode) {
        case REQUEST_CREATE_SHORTCUT:
            completeAddShortcut(args.intent, args.container, args.cellX, args.cellY);
            break;
        case REQUEST_CREATE_APPWIDGET:
            completeAddAppWidget(args.appWidgetId, args.container, null, null);
            break;
        case REQUEST_RECONFIGURE_APPWIDGET:
            completeRestoreAppWidget(args.appWidgetId);
            break;
        }
        // Before adding this resetAddInfo(), after a shortcut was added to a workspace screen,
        // if you turned the screen off and then back while in All Apps, Launcher would not
        // return to the workspace. Clearing mAddInfo.container here fixes this issue
        resetAddInfo();
    }

    private void handleActivityResult(final int requestCode, final int resultCode, final Intent data) {
        // Reset the startActivity waiting flag
        setWaitingForResult(false);
        final int pendingAddWidgetId = mPendingAddWidgetId;
        mPendingAddWidgetId = -1;

        if (requestCode == REQUEST_BIND_APPWIDGET) {
            final int appWidgetId = data != null ? data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1) : -1;
            if (resultCode == RESULT_CANCELED) {
                completeTwoStageWidgetDrop(RESULT_CANCELED, appWidgetId);
            } else if (resultCode == RESULT_OK) {
                addAppWidgetImpl(appWidgetId, mPendingAddInfo, null, mPendingAddWidgetInfo,
                        ON_ACTIVITY_RESULT_ANIMATION_DELAY);
            }
            return;
        } else if (requestCode == REQUEST_PICK_WALLPAPER) {
            if (resultCode == RESULT_OK && mWorkspace.isInOverviewMode()) {
                mWorkspace.exitOverviewMode(false);
            }
            return;
        }

        boolean isWidgetDrop = (requestCode == REQUEST_PICK_APPWIDGET || requestCode == REQUEST_CREATE_APPWIDGET);

        final boolean workspaceLocked = isWorkspaceLocked();
        // We have special handling for widgets
        if (isWidgetDrop) {
            final int appWidgetId;
            int widgetId = data != null ? data.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, -1) : -1;
            if (widgetId < 0) {
                appWidgetId = pendingAddWidgetId;
            } else {
                appWidgetId = widgetId;
            }

            final int result;
            if (appWidgetId < 0 || resultCode == RESULT_CANCELED) {
                Log.e(TAG, "Error: appWidgetId (EXTRA_APPWIDGET_ID) was not "
                        + "returned from the widget configuration activity.");
                result = RESULT_CANCELED;
                completeTwoStageWidgetDrop(result, appWidgetId);
                final Runnable onComplete = new Runnable() {
                    @Override
                    public void run() {
                        exitSpringLoadedDragModeDelayed(false, 0, null);
                    }
                };
                if (workspaceLocked) {
                    // No need to remove the empty screen if we're mid-binding, as the
                    // the bind will not add the empty screen.
                    mWorkspace.postDelayed(onComplete, ON_ACTIVITY_RESULT_ANIMATION_DELAY);
                }
            } else {
                if (!workspaceLocked) {
                    completeTwoStageWidgetDrop(resultCode, appWidgetId);
                } else {
                    sPendingAddItem = preparePendingAddArgs(requestCode, data, appWidgetId, mPendingAddInfo);
                }
            }
            return;
        }

        if (requestCode == REQUEST_RECONFIGURE_APPWIDGET) {
            if (resultCode == RESULT_OK) {
                // Update the widget view.
                PendingAddArguments args = preparePendingAddArgs(requestCode, data, pendingAddWidgetId,
                        mPendingAddInfo);
                if (workspaceLocked) {
                    sPendingAddItem = args;
                } else {
                    completeAdd(args);
                }
            }
            // Leave the widget in the pending state if the user canceled the configure.
            return;
        }

        // The pattern used here is that a user PICKs a specific application,
        // which, depending on the target, might need to CREATE the actual target.

        // For example, the user would PICK_SHORTCUT for "Music playlist", and we
        // launch over to the Music app to actually CREATE_SHORTCUT.
        if (resultCode == RESULT_OK && mPendingAddInfo.container != ItemInfo.NO_ID) {
            final PendingAddArguments args = preparePendingAddArgs(requestCode, data, -1, mPendingAddInfo);
            if (isWorkspaceLocked()) {
                sPendingAddItem = args;
            } else {
                completeAdd(args);
            }
        }
        mDragLayer.clearAnimatedView();

    }

    @Override
    protected void onActivityResult(final int requestCode, final int resultCode, final Intent data) {
        handleActivityResult(requestCode, resultCode, data);
    }

    private PendingAddArguments preparePendingAddArgs(int requestCode, Intent data, int appWidgetId,
            ItemInfo info) {
        PendingAddArguments args = new PendingAddArguments();
        args.requestCode = requestCode;
        args.intent = data;
        args.container = info.container;
        args.cellX = info.cellX;
        args.cellY = info.cellY;
        args.appWidgetId = appWidgetId;
        return args;
    }

    private void completeTwoStageWidgetDrop(final int resultCode, final int appWidgetId) {
        CellLayout cellLayout = mWorkspace.getScreen();
        Runnable onCompleteRunnable = null;
        int animationType = 0;

        AppWidgetHostView boundWidget = null;
        if (resultCode == RESULT_OK) {
            animationType = Workspace.COMPLETE_TWO_STAGE_WIDGET_DROP_ANIMATION;
            final AppWidgetHostView layout = mAppWidgetHost.createView(this, appWidgetId, mPendingAddWidgetInfo);
            boundWidget = layout;
            onCompleteRunnable = new Runnable() {
                @Override
                public void run() {
                    completeAddAppWidget(appWidgetId, mPendingAddInfo.container, layout, null);
                    exitSpringLoadedDragModeDelayed(true, EXIT_SPRINGLOADED_MODE_SHORT_TIMEOUT, null);
                }
            };
        } else if (resultCode == RESULT_CANCELED) {
            mAppWidgetHost.deleteAppWidgetId(appWidgetId);
            animationType = Workspace.CANCEL_TWO_STAGE_WIDGET_DROP_ANIMATION;
        }
        if (mDragLayer.getAnimatedView() != null) {
            mWorkspace.animateWidgetDrop(mPendingAddInfo, cellLayout, (DragView) mDragLayer.getAnimatedView(),
                    onCompleteRunnable, animationType, boundWidget, true);
        } else if (onCompleteRunnable != null) {
            // The animated view may be null in the case of a rotation during widget configuration
            onCompleteRunnable.run();
        }
    }

    @Override
    protected void onStop() {
        super.onStop();
        FirstFrameAnimatorHelper.setIsVisible(false);
    }

    @Override
    protected void onStart() {
        super.onStart();
        FirstFrameAnimatorHelper.setIsVisible(true);
    }

    @Override
    protected void onResume() {
        long startTime = 0;
        if (DEBUG_RESUME_TIME) {
            startTime = System.currentTimeMillis();
            Log.v(TAG, "Launcher.onResume()");
        }

        super.onResume();

        // On large interfaces, we want the screen to auto-rotate based on the current orientation
        unlockScreenOrientation(true);

        // hide/show status bar
        Utilities.showStatusbar(getWindow(), this);

        // Restore the previous launcher state
        if (mOnResumeState == State.WORKSPACE) {
            showWorkspace(false);
        } else if (mOnResumeState == State.APPS_CUSTOMIZE) {
            showAllApps(false, mAppsCustomizeContent.getContentType(), false);
        }
        mOnResumeState = State.NONE;

        // Background was set to gradient in onPause(), restore to black if in all apps.
        setWorkspaceBackground(mState == State.WORKSPACE);

        mPaused = false;
        if (mRestoring || mOnResumeNeedsLoad) {
            setWorkspaceLoading(true);
            mModel.startLoader(true, PagedView.INVALID_RESTORE_PAGE);
            mRestoring = false;
            mOnResumeNeedsLoad = false;
        }
        if (mBindOnResumeCallbacks.size() > 0) {
            // We might have postponed some bind calls until onResume (see waitUntilResume) --
            // execute them here
            long startTimeCallbacks = 0;
            if (DEBUG_RESUME_TIME) {
                startTimeCallbacks = System.currentTimeMillis();
            }

            if (mAppsCustomizeContent != null) {
                mAppsCustomizeContent.setBulkBind(true);
            }
            for (int i = 0; i < mBindOnResumeCallbacks.size(); i++) {
                mBindOnResumeCallbacks.get(i).run();
            }
            if (mAppsCustomizeContent != null) {
                mAppsCustomizeContent.setBulkBind(false);
            }
            mBindOnResumeCallbacks.clear();
            if (DEBUG_RESUME_TIME) {
                Log.d(TAG, "Time spent processing callbacks in onResume: "
                        + (System.currentTimeMillis() - startTimeCallbacks));
            }
        }
        if (mOnResumeCallbacks.size() > 0) {
            for (int i = 0; i < mOnResumeCallbacks.size(); i++) {
                mOnResumeCallbacks.get(i).run();
            }
            mOnResumeCallbacks.clear();
        }

        // Reset the pressed state of icons that were locked in the press state while activities
        // were launching
        if (mWaitingForResume != null) {
            // Resets the previous workspace icon press state
            mWaitingForResume.setStayPressed(false);
        }

        // It is possible that widgets can receive updates while launcher is not in the foreground.
        // Consequently, the widgets will be inflated in the orientation of the foreground activity
        // (framework issue). On resuming, we ensure that any widgets are inflated for the current
        // orientation.
        getWorkspace().reinflateWidgetsIfNecessary();

        if (DEBUG_RESUME_TIME) {
            Log.d(TAG, "Time spent in onResume: " + (System.currentTimeMillis() - startTime));
        }

        mWorkspace.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        mPaused = true;
        mLastOrientation = getResources().getConfiguration().orientation;
        mDragController.cancelDrag();
        mDragController.resetLastGestureUpTime();
    }

    @Override
    public Object onRetainNonConfigurationInstance() {
        // Flag the loader to stop early before switching
        if (mModel.isCurrentCallbacks(this)) {
            mModel.stopLoader();
        }
        if (mAppsCustomizeContent != null) {
            mAppsCustomizeContent.surrender();
        }
        return Boolean.TRUE;
    }

    // We can't hide the IME if it was forced open.  So don't bother
    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        mHasFocus = hasFocus;
    }

    /**
     * Restores the previous state, if it exists.
     *
     * @param savedState The previous state.
     */
    @SuppressWarnings("unchecked")
    private void restoreState(Bundle savedState) {
        if (savedState == null) {
            return;
        }

        State state = intToState(savedState.getInt(RUNTIME_STATE, State.WORKSPACE.ordinal()));
        if (state == State.APPS_CUSTOMIZE) {
            mOnResumeState = State.APPS_CUSTOMIZE;
        }

        final long pendingAddContainer = savedState.getLong(RUNTIME_STATE_PENDING_ADD_CONTAINER, -1);

        if (pendingAddContainer != ItemInfo.NO_ID) {
            mPendingAddInfo.container = pendingAddContainer;
            mPendingAddInfo.cellX = savedState.getInt(RUNTIME_STATE_PENDING_ADD_CELL_X);
            mPendingAddInfo.cellY = savedState.getInt(RUNTIME_STATE_PENDING_ADD_CELL_Y);
            mPendingAddInfo.spanX = savedState.getInt(RUNTIME_STATE_PENDING_ADD_SPAN_X);
            mPendingAddInfo.spanY = savedState.getInt(RUNTIME_STATE_PENDING_ADD_SPAN_Y);
            mPendingAddWidgetInfo = savedState.getParcelable(RUNTIME_STATE_PENDING_ADD_WIDGET_INFO);
            mPendingAddWidgetId = savedState.getInt(RUNTIME_STATE_PENDING_ADD_WIDGET_ID);
            setWaitingForResult(true);
            mRestoring = true;
        }

        // Restore the AppsCustomize tab
        if (mAppsCustomizeTabHost != null) {
            String curTab = savedState.getString("apps_customize_currentTab");
            if (curTab != null) {
                mAppsCustomizeTabHost
                        .setContentTypeImmediate(mAppsCustomizeTabHost.getContentTypeForTabTag(curTab));
                mAppsCustomizeContent.loadAssociatedPages(mAppsCustomizeContent.getCurrentPage());
            }

            int currentIndex = savedState.getInt("apps_customize_currentIndex");
            mAppsCustomizeContent.restorePageForIndex(currentIndex);
        }
    }

    /**
     * Finds all the views we need and configure them properly.
     */
    private void setupViews() {
        final DragController dragController = mDragController;

        mLauncherView = findViewById(R.id.launcher);
        mDragLayer = (DragLayer) findViewById(R.id.drag_layer);
        mWorkspace = (Workspace) mDragLayer.findViewById(R.id.workspace);

        mLauncherView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
        mWorkspaceBackgroundDrawable = getResources().getDrawable(R.drawable.workspace_bg);

        // Setup the drag layer
        mDragLayer.setup(this, dragController);

        mOverviewPanel = (ViewGroup) findViewById(R.id.overview_panel);
        View widgetButton = findViewById(R.id.widget_button);
        widgetButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                if (!mWorkspace.isSwitchingState()) {
                    onClickAddWidgetButton(arg0);
                }
            }
        });
        widgetButton.setOnTouchListener(getHapticFeedbackTouchListener());

        View wallpaperButton = findViewById(R.id.wallpaper_button);
        wallpaperButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                if (!mWorkspace.isSwitchingState()) {
                    onClickWallpaperPicker(arg0);
                }
            }
        });
        wallpaperButton.setOnTouchListener(getHapticFeedbackTouchListener());

        View settingsButton = findViewById(R.id.settings_button);
        settingsButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View arg0) {
                if (!mWorkspace.isSwitchingState()) {
                    onClickSettingsButton(arg0);
                }
            }
        });
        settingsButton.setOnTouchListener(getHapticFeedbackTouchListener());

        mOverviewPanel.setAlpha(0f);

        // Setup the workspace
        mWorkspace.setHapticFeedbackEnabled(false);
        mWorkspace.setOnLongClickListener(this);
        mWorkspace.setup(dragController);
        dragController.addDragListener(mWorkspace);

        // Get the search/delete bar
        mDeleteDropTargetBar = (DeleteDropTargetBar) mDragLayer.findViewById(R.id.delete_drop_target_bar);

        // Setup AppsCustomize
        mAppsCustomizeTabHost = (AppsCustomizeTabHost) findViewById(R.id.apps_customize_pane);
        mAppsCustomizeContent = (AppsCustomizePagedView) mAppsCustomizeTabHost
                .findViewById(R.id.apps_customize_pane_content);
        mAppsCustomizeContent.setup(this, dragController);

        // Setup the drag controller (drop targets have to be added in reverse order in priority)
        dragController.setScrollView(mDragLayer);
        dragController.setMoveTarget(mWorkspace);
        dragController.addDropTarget(mWorkspace);
        if (mDeleteDropTargetBar != null) {
            mDeleteDropTargetBar.setup(this, dragController);
        }
    }

    public View getAllAppsButton() {
        return mAllAppsButton;
    }

    /**
     * Sets the all apps button. This method is called from {@link Workspace}.
     */
    public void setAllAppsButton(View allAppsButton) {
        mAllAppsButton = allAppsButton;
    }

    /**
     * Creates a view representing a shortcut.
     *
     * @param info The data structure describing the shortcut.
     * @return A View inflated from R.layout.application.
     */
    View createShortcut(ShortcutInfo info) {
        return createShortcut(R.layout.application, mWorkspace.getScreen(), info);
    }

    /**
     * Creates a view representing a shortcut inflated from the specified resource.
     *
     * @param layoutResId The id of the XML layout used to create the shortcut.
     * @param parent      The group the shortcut belongs to.
     * @param info        The data structure describing the shortcut.
     * @return A View inflated from layoutResId.
     */
    View createShortcut(int layoutResId, ViewGroup parent, ShortcutInfo info) {
        BubbleTextView favorite = (BubbleTextView) mInflater.inflate(layoutResId, parent, false);
        favorite.applyFromShortcutInfoFromLauncher(info, mIconCache, true);
        favorite.setOnClickListener(this);
        return favorite;
    }

    /**
     * Add a shortcut to the workspace.
     */
    private void completeAddShortcut(Intent data, long container, int cellX, int cellY) {
        int[] cellXY = mTmpAddItemCellCoordinates;
        int[] touchXY = mPendingAddInfo.dropPos;
        CellLayout layout = mWorkspace.getScreen();

        boolean foundCellSpan = false;

        ShortcutInfo info = mModel.infoFromShortcutIntent(this, data);
        if (info == null) {
            return;
        }
        final View view = createShortcut(info);

        // First we check if we already know the exact location where we want to add this item.
        if (cellX >= 0 && cellY >= 0) {
            cellXY[0] = cellX;
            cellXY[1] = cellY;
            foundCellSpan = true;

            // If appropriate, either create a folder or add to an existing folder
            DragObject dragObject = new DragObject();
            dragObject.dragInfo = info;
        } else if (touchXY != null) {
            // when dragging and dropping, just find the closest free spot
            int[] result = layout.findNearestVacantArea(touchXY[0], touchXY[1], 1, 1, cellXY);
            foundCellSpan = (result != null);
        } else {
            foundCellSpan = layout.findCellForSpan(cellXY, 1, 1);
        }

        if (!foundCellSpan) {
            showOutOfSpaceMessage();
            return;
        }

        LauncherModel.addItemToDatabase(this, info, container, cellXY[0], cellXY[1], false);

        if (!mRestoring) {
            mWorkspace.addInScreen(view, container, cellXY[0], cellXY[1], 1, 1, isWorkspaceLocked());
        }
    }

    /**
     * Add a widget to the workspace.
     */
    private void completeAddAppWidget(final int appWidgetId, long container, AppWidgetHostView hostView,
            AppWidgetProviderInfo appWidgetInfo) {
        if (appWidgetInfo == null) {
            appWidgetInfo = mAppWidgetManager.getAppWidgetInfo(appWidgetId);
        }

        // Calculate the grid spans needed to fit this widget
        CellLayout layout = mWorkspace.getScreen();

        int[] minSpanXY = getMinSpanForWidget(this, appWidgetInfo);
        int[] spanXY = getSpanForWidget(this, appWidgetInfo);

        // Try finding open space on Launcher screen
        // We have saved the position to which the widget was dragged-- this really only matters
        // if we are placing widgets on a "spring-loaded" screen
        int[] cellXY = mTmpAddItemCellCoordinates;
        int[] touchXY = mPendingAddInfo.dropPos;
        int[] finalSpan = new int[2];
        boolean foundCellSpan = false;
        if (mPendingAddInfo.cellX >= 0 && mPendingAddInfo.cellY >= 0) {
            cellXY[0] = mPendingAddInfo.cellX;
            cellXY[1] = mPendingAddInfo.cellY;
            spanXY[0] = mPendingAddInfo.spanX;
            spanXY[1] = mPendingAddInfo.spanY;
            foundCellSpan = true;
        } else if (touchXY != null) {
            // when dragging and dropping, just find the closest free spot
            int[] result = layout.findNearestVacantArea(touchXY[0], touchXY[1], minSpanXY[0], minSpanXY[1],
                    spanXY[0], spanXY[1], cellXY, finalSpan);
            spanXY[0] = finalSpan[0];
            spanXY[1] = finalSpan[1];
            foundCellSpan = (result != null);
        } else {
            foundCellSpan = layout.findCellForSpan(cellXY, minSpanXY[0], minSpanXY[1]);
        }

        if (!foundCellSpan) {
            if (appWidgetId != -1) {
                // Deleting an app widget ID is a void call but writes to disk before returning
                // to the caller...
                new AsyncTask<Void, Void, Void>() {
                    public Void doInBackground(Void... args) {
                        mAppWidgetHost.deleteAppWidgetId(appWidgetId);
                        return null;
                    }
                }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
            }
            showOutOfSpaceMessage();
            return;
        }

        // Build Launcher-specific widget info and save to database
        LauncherAppWidgetInfo launcherInfo = new LauncherAppWidgetInfo(appWidgetId, appWidgetInfo.provider);
        launcherInfo.spanX = spanXY[0];
        launcherInfo.spanY = spanXY[1];
        launcherInfo.minSpanX = mPendingAddInfo.minSpanX;
        launcherInfo.minSpanY = mPendingAddInfo.minSpanY;
        launcherInfo.user = mAppWidgetManager.getUser(appWidgetInfo);

        LauncherModel.addItemToDatabase(this, launcherInfo, container, cellXY[0], cellXY[1], false);

        if (!mRestoring) {
            if (hostView == null) {
                // Perform actual inflation because we're live
                launcherInfo.hostView = mAppWidgetHost.createView(this, appWidgetId, appWidgetInfo);
                launcherInfo.hostView.setAppWidget(appWidgetId, appWidgetInfo);
            } else {
                // The AppWidgetHostView has already been inflated and instantiated
                launcherInfo.hostView = hostView;
            }

            launcherInfo.hostView.setTag(launcherInfo);
            launcherInfo.hostView.setVisibility(View.VISIBLE);
            launcherInfo.notifyWidgetSizeChanged(this);

            mWorkspace.addInScreen(launcherInfo.hostView, container, cellXY[0], cellXY[1], launcherInfo.spanX,
                    launcherInfo.spanY, isWorkspaceLocked());

            addWidgetToAutoAdvanceIfNeeded(launcherInfo.hostView, appWidgetInfo);
        }
        resetAddInfo();
    }

    @Override
    public void onAttachedToWindow() {
        super.onAttachedToWindow();

        // Listen for broadcasts related to user-presence
        final IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        filter.addAction(Intent.ACTION_USER_PRESENT);
        // For handling managed profiles
        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_ADDED);
        filter.addAction(LauncherAppsCompat.ACTION_MANAGED_PROFILE_REMOVED);
        registerReceiver(mReceiver, filter);
        FirstFrameAnimatorHelper.initializeDrawListener(getWindow().getDecorView());
        setupTransparentSystemBarsForLmp();
        mAttached = true;
        mVisible = true;
    }

    /**
     * Sets up transparent navigation and status bars in LMP.
     * This method is a no-op for other platform versions.
     */
    @TargetApi(19)
    private void setupTransparentSystemBarsForLmp() {
        // TODO(sansid): use the APIs directly when compiling against L sdk.
        // Currently we use reflection to access the flags and the API to set the transparency
        // on the System bars.
        if (Utilities.isLmpOrAbove()) {
            try {
                getWindow().getAttributes().systemUiVisibility |= (View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
                getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
                        | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
                Field drawsSysBackgroundsField = WindowManager.LayoutParams.class
                        .getField("FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS");
                getWindow().addFlags(drawsSysBackgroundsField.getInt(null));

                Method setStatusBarColorMethod = Window.class.getDeclaredMethod("setStatusBarColor", int.class);
                Method setNavigationBarColorMethod = Window.class.getDeclaredMethod("setNavigationBarColor",
                        int.class);
                setStatusBarColorMethod.invoke(getWindow(), Color.TRANSPARENT);
                setNavigationBarColorMethod.invoke(getWindow(), Color.TRANSPARENT);
            } catch (NoSuchFieldException e) {
                Log.w(TAG, "NoSuchFieldException while setting up transparent bars");
            } catch (NoSuchMethodException ex) {
                Log.w(TAG, "NoSuchMethodException while setting up transparent bars");
            } catch (IllegalAccessException e) {
                Log.w(TAG, "IllegalAccessException while setting up transparent bars");
            } catch (IllegalArgumentException e) {
                Log.w(TAG, "IllegalArgumentException while setting up transparent bars");
            } catch (InvocationTargetException e) {
                Log.w(TAG, "InvocationTargetException while setting up transparent bars");
            }
        }
    }

    @Override
    public void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        mVisible = false;

        if (mAttached) {
            unregisterReceiver(mReceiver);
            mAttached = false;
        }
        updateRunning();
    }

    public void onWindowVisibilityChanged(int visibility) {
        mVisible = visibility == View.VISIBLE;
        updateRunning();
        // The following code used to be in onResume, but it turns out onResume is called when
        // you're in All Apps and click home to go to the workspace. onWindowVisibilityChanged
        // is a more appropriate event to handle
        if (mVisible) {
            mAppsCustomizeTabHost.onWindowVisible();
        }
    }

    private void sendAdvanceMessage(long delay) {
        mHandler.removeMessages(ADVANCE_MSG);
        Message msg = mHandler.obtainMessage(ADVANCE_MSG);
        mHandler.sendMessageDelayed(msg, delay);
        mAutoAdvanceSentTime = System.currentTimeMillis();
    }

    private void updateRunning() {
        boolean autoAdvanceRunning = mVisible && mUserPresent && !mWidgetsToAdvance.isEmpty();
        if (autoAdvanceRunning != mAutoAdvanceRunning) {
            mAutoAdvanceRunning = autoAdvanceRunning;
            if (autoAdvanceRunning) {
                long delay = mAutoAdvanceTimeLeft == -1 ? mAdvanceInterval : mAutoAdvanceTimeLeft;
                sendAdvanceMessage(delay);
            } else {
                if (!mWidgetsToAdvance.isEmpty()) {
                    mAutoAdvanceTimeLeft = Math.max(0,
                            mAdvanceInterval - (System.currentTimeMillis() - mAutoAdvanceSentTime));
                }
                mHandler.removeMessages(ADVANCE_MSG);
                mHandler.removeMessages(0); // Remove messages sent using postDelayed()
            }
        }
    }

    void addWidgetToAutoAdvanceIfNeeded(View hostView, AppWidgetProviderInfo appWidgetInfo) {
        if (appWidgetInfo == null || appWidgetInfo.autoAdvanceViewId == -1)
            return;
        View v = hostView.findViewById(appWidgetInfo.autoAdvanceViewId);
        if (v instanceof Advanceable) {
            mWidgetsToAdvance.put(hostView, appWidgetInfo);
            ((Advanceable) v).fyiWillBeAdvancedByHostKThx();
            updateRunning();
        }
    }

    void removeWidgetToAutoAdvance(View hostView) {
        if (mWidgetsToAdvance.containsKey(hostView)) {
            mWidgetsToAdvance.remove(hostView);
            updateRunning();
        }
    }

    public void removeAppWidget(LauncherAppWidgetInfo launcherInfo) {
        removeWidgetToAutoAdvance(launcherInfo.hostView);
        launcherInfo.hostView = null;
    }

    void showOutOfSpaceMessage() {
        int strId = R.string.out_of_space;
        Toast.makeText(this, getString(strId), Toast.LENGTH_SHORT).show();
    }

    public DragLayer getDragLayer() {
        return mDragLayer;
    }

    public Workspace getWorkspace() {
        return mWorkspace;
    }

    public ViewGroup getOverviewPanel() {
        return mOverviewPanel;
    }

    public DeleteDropTargetBar getDeleteDropBar() {
        return mDeleteDropTargetBar;
    }

    public LauncherAppWidgetHost getAppWidgetHost() {
        return mAppWidgetHost;
    }

    public LauncherModel getModel() {
        return mModel;
    }

    public void closeSystemDialogs() {
        getWindow().closeAllPanels();

        // Whatever we were doing is hereby canceled.
        setWaitingForResult(false);
    }

    @Override
    protected void onNewIntent(Intent intent) {
        long startTime = 0;
        if (DEBUG_RESUME_TIME) {
            startTime = System.currentTimeMillis();
        }
        super.onNewIntent(intent);

        // Close the menu
        if (Intent.ACTION_MAIN.equals(intent.getAction())) {
            // also will cancel mWaitingForResult.
            closeSystemDialogs();

            final boolean alreadyOnHome = mHasFocus && ((intent.getFlags()
                    & Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT) != Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT);

            if (mWorkspace == null) {
                // Can be cases where mWorkspace is null, this prevents a NPE
                return;
            }
            // In all these cases, only animate if we're already on home
            mWorkspace.exitWidgetResizeMode();
            mWorkspace.requestFocus();

            exitSpringLoadedDragMode();

            // If we are already on home, then just animate back to the workspace,
            // otherwise, just wait until onResume to set the state back to Workspace
            if (alreadyOnHome) {
                showWorkspace(true);
            } else {
                mOnResumeState = State.WORKSPACE;
            }

            final View v = getWindow().peekDecorView();
            if (v != null && v.getWindowToken() != null) {
                InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
                imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
            }

            // Reset the apps customize page
            if (!alreadyOnHome && mAppsCustomizeTabHost != null) {
                mAppsCustomizeTabHost.reset();
            }
        }

        if (DEBUG_RESUME_TIME) {
            Log.d(TAG, "Time spent in onNewIntent: " + (System.currentTimeMillis() - startTime));
        }
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        outState.putInt(RUNTIME_STATE, mState.ordinal());

        if (mPendingAddInfo.container != ItemInfo.NO_ID && mWaitingForResult) {
            outState.putLong(RUNTIME_STATE_PENDING_ADD_CONTAINER, mPendingAddInfo.container);
            outState.putInt(RUNTIME_STATE_PENDING_ADD_CELL_X, mPendingAddInfo.cellX);
            outState.putInt(RUNTIME_STATE_PENDING_ADD_CELL_Y, mPendingAddInfo.cellY);
            outState.putInt(RUNTIME_STATE_PENDING_ADD_SPAN_X, mPendingAddInfo.spanX);
            outState.putInt(RUNTIME_STATE_PENDING_ADD_SPAN_Y, mPendingAddInfo.spanY);
            outState.putParcelable(RUNTIME_STATE_PENDING_ADD_WIDGET_INFO, mPendingAddWidgetInfo);
            outState.putInt(RUNTIME_STATE_PENDING_ADD_WIDGET_ID, mPendingAddWidgetId);
        }

        // Save the current AppsCustomize tab
        if (mAppsCustomizeTabHost != null) {
            AppsCustomizePagedView.ContentType type = mAppsCustomizeContent.getContentType();
            String currentTabTag = mAppsCustomizeTabHost.getTabTagForContentType(type);
            if (currentTabTag != null) {
                outState.putString("apps_customize_currentTab", currentTabTag);
            }
            int currentIndex = mAppsCustomizeContent.getSaveInstanceStateIndex();
            outState.putInt("apps_customize_currentIndex", currentIndex);
        }
        outState.putSerializable(RUNTIME_STATE_VIEW_IDS, mItemIdToViewId);

        super.onSaveInstanceState(outState);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();

        // Remove all pending runnables
        mHandler.removeMessages(ADVANCE_MSG);
        mHandler.removeMessages(0);
        mWorkspace.removeCallbacks(mBuildLayersRunnable);

        // Stop callbacks from LauncherModel
        LauncherAppState app = (LauncherAppState.getInstance());

        // It's possible to receive onDestroy after a new Launcher activity has
        // been created. In this case, don't interfere with the new Launcher.
        if (mModel.isCurrentCallbacks(this)) {
            mModel.stopLoader();
            app.setLauncher(null);
        }

        try {
            mAppWidgetHost.stopListening();
        } catch (NullPointerException ex) {
            Log.w(TAG, "problem while stopping AppWidgetHost during Launcher destruction", ex);
        }
        mAppWidgetHost = null;

        mWidgetsToAdvance.clear();

        TextKeyListener.getInstance().release();

        // Disconnect any of the callbacks and drawables associated with ItemInfos on the workspace
        // to prevent leaking Launcher activities on orientation change.
        if (mModel != null) {
            mModel.unbindItemInfosAndClearQueuedBindRunnables();
        }

        getContentResolver().unregisterContentObserver(mWidgetObserver);
        unregisterReceiver(mCloseSystemDialogsReceiver);

        mDragLayer.clearAllResizeFrames();
        ((ViewGroup) mWorkspace.getParent()).removeAllViews();
        mWorkspace.removeAllWorkspace();
        mWorkspace = null;
        mDragController = null;

        LauncherAnimUtils.onDestroyActivity();

    }

    public DragController getDragController() {
        return mDragController;
    }

    @Override
    public void startActivityForResult(Intent intent, int requestCode) {
        if (requestCode >= 0) {
            setWaitingForResult(true);
        }
        super.startActivityForResult(intent, requestCode);
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        super.onPrepareOptionsMenu(menu);
        // Stop resizing any widgets
        mWorkspace.exitWidgetResizeMode();
        if (!mWorkspace.isInOverviewMode()) {
            // Show the overview mode
            showOverviewMode(true);
        } else {
            showWorkspace(true);
        }
        return false;
    }

    public boolean isWorkspaceLocked() {
        return mWorkspaceLoading || mWaitingForResult;
    }

    public boolean isWorkspaceLoading() {
        return mWorkspaceLoading;
    }

    private void setWorkspaceLoading(boolean value) {
        boolean isLocked = isWorkspaceLocked();
        mWorkspaceLoading = value;
    }

    private void setWaitingForResult(boolean value) {
        boolean isLocked = isWorkspaceLocked();
        mWaitingForResult = value;
    }

    private void resetAddInfo() {
        mPendingAddInfo.container = ItemInfo.NO_ID;
        mPendingAddInfo.cellX = mPendingAddInfo.cellY = -1;
        mPendingAddInfo.spanX = mPendingAddInfo.spanY = -1;
        mPendingAddInfo.minSpanX = mPendingAddInfo.minSpanY = -1;
        mPendingAddInfo.dropPos = null;
    }

    void addAppWidgetImpl(final int appWidgetId, final ItemInfo info, final AppWidgetHostView boundWidget,
            final AppWidgetProviderInfo appWidgetInfo) {
        addAppWidgetImpl(appWidgetId, info, boundWidget, appWidgetInfo, 0);
    }

    void addAppWidgetImpl(final int appWidgetId, final ItemInfo info, final AppWidgetHostView boundWidget,
            final AppWidgetProviderInfo appWidgetInfo, int delay) {
        if (appWidgetInfo.configure != null) {
            mPendingAddWidgetInfo = appWidgetInfo;
            mPendingAddWidgetId = appWidgetId;

            // Launch over to configure widget, if needed
            mAppWidgetManager.startConfigActivity(appWidgetInfo, appWidgetId, this, mAppWidgetHost,
                    REQUEST_CREATE_APPWIDGET);

        } else {
            // Otherwise just add it
            exitSpringLoadedDragModeDelayed(true, EXIT_SPRINGLOADED_MODE_SHORT_TIMEOUT, null);
            completeAddAppWidget(appWidgetId, info.container, boundWidget, appWidgetInfo);
        }
    }

    /**
     * Process a shortcut drop.
     *
     * @param componentName The name of the component
     * @param cell          The cell it should be added to, optional
     */
    void processShortcutFromDrop(ComponentName componentName, long container, int[] cell, int[] loc) {
        resetAddInfo();
        mPendingAddInfo.container = container;
        mPendingAddInfo.dropPos = loc;

        if (cell != null) {
            mPendingAddInfo.cellX = cell[0];
            mPendingAddInfo.cellY = cell[1];
        }

        Intent createShortcutIntent = new Intent(Intent.ACTION_CREATE_SHORTCUT);
        createShortcutIntent.setComponent(componentName);
        processShortcut(createShortcutIntent);
    }

    /**
     * Process a widget drop.
     *
     * @param info The PendingAppWidgetInfo of the widget being added.
     * @param cell The cell it should be added to, optional
     */
    void addAppWidgetFromDrop(PendingAddWidgetInfo info, long container, int[] cell, int[] span, int[] loc) {
        resetAddInfo();
        mPendingAddInfo.container = info.container = container;
        mPendingAddInfo.dropPos = loc;
        mPendingAddInfo.minSpanX = info.minSpanX;
        mPendingAddInfo.minSpanY = info.minSpanY;

        if (cell != null) {
            mPendingAddInfo.cellX = cell[0];
            mPendingAddInfo.cellY = cell[1];
        }
        if (span != null) {
            mPendingAddInfo.spanX = span[0];
            mPendingAddInfo.spanY = span[1];
        }

        AppWidgetHostView hostView = info.boundWidget;
        int appWidgetId;
        if (hostView != null) {
            appWidgetId = hostView.getAppWidgetId();
            addAppWidgetImpl(appWidgetId, info, hostView, info.info);
        } else {
            // In this case, we either need to start an activity to get permission to bind
            // the widget, or we need to start an activity to configure the widget, or both.
            appWidgetId = getAppWidgetHost().allocateAppWidgetId();
            Bundle options = info.bindOptions;

            boolean success = mAppWidgetManager.bindAppWidgetIdIfAllowed(appWidgetId, info.info, options);
            if (success) {
                addAppWidgetImpl(appWidgetId, info, null, info.info);
            } else {
                mPendingAddWidgetInfo = info.info;
                Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_BIND);
                intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
                intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_PROVIDER, info.componentName);
                mAppWidgetManager.getUser(mPendingAddWidgetInfo).addToIntent(intent,
                        AppWidgetManager.EXTRA_APPWIDGET_PROVIDER_PROFILE);
                // TODO: we need to make sure that this accounts for the options bundle.
                // intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_OPTIONS, options);
                startActivityForResult(intent, REQUEST_BIND_APPWIDGET);
            }
        }
    }

    void processShortcut(Intent intent) {
        Utilities.startActivityForResultSafely(this, intent, REQUEST_CREATE_SHORTCUT);
    }

    /**
     * Registers various content observers. The current implementation registers
     * only a favorites observer to keep track of the favorites applications.
     */
    private void registerContentObservers() {
        ContentResolver resolver = getContentResolver();
        resolver.registerContentObserver(LauncherProvider.CONTENT_APPWIDGET_RESET_URI, true, mWidgetObserver);
    }

    @Override
    public void onBackPressed() {
        if (isAllAppsVisible()) {
            if (mAppsCustomizeContent.getContentType() == AppsCustomizePagedView.ContentType.Applications) {
                showWorkspace(true);
            } else {
                showOverviewMode(true);
            }
        } else if (mWorkspace.isInOverviewMode()) {
            mWorkspace.exitOverviewMode(true);
        } else {
            mWorkspace.exitWidgetResizeMode();
        }
    }

    /**
     * Re-listen when widgets are reset.
     */
    private void onAppWidgetReset() {
        if (mAppWidgetHost != null) {
            mAppWidgetHost.startListening();
        }
    }

    /**
     * Launches the intent referred by the clicked shortcut.
     *
     * @param v The view representing the clicked shortcut.
     */
    public void onClick(View v) {
        // Make sure that rogue clicks don't get through while allapps is launching, or after the
        // view has detached (it's possible for this to happen if the view is removed mid touch).
        if (v.getWindowToken() == null) {
            return;
        }

        if (!mWorkspace.isFinishedSwitchingState()) {
            return;
        }

        if (v instanceof CellLayout || v instanceof Workspace) {
            if (mWorkspace.isInOverviewMode()) {
                mWorkspace.exitOverviewMode(true);
                return;
            }
        }

        Object tag = v.getTag();
        if (tag instanceof ShortcutInfo) {
            onClickAppShortcut(v);
        } else if (v == mAllAppsButton) {
            onClickAllAppsButton(v);
        } else if (tag instanceof AppInfo) {
            startAppShortcutOrInfoActivity(v);
        } else if (tag instanceof LauncherAppWidgetInfo) {
            if (v instanceof PendingAppWidgetHostView) {
                onClickPendingWidget((PendingAppWidgetHostView) v);
            }
        }
    }

    public boolean onTouch(View v, MotionEvent event) {
        return false;
    }

    /**
     * Event handler for the app widget view which has not fully restored.
     */
    public void onClickPendingWidget(final PendingAppWidgetHostView v) {
        if (mIsSafeModeEnabled) {
            Toast.makeText(this, R.string.safemode_widget_error, Toast.LENGTH_SHORT).show();
            return;
        }

        final LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) v.getTag();
        if (v.isReadyForClickSetup()) {
            int widgetId = info.appWidgetId;
            AppWidgetProviderInfo appWidgetInfo = mAppWidgetManager.getAppWidgetInfo(widgetId);
            if (appWidgetInfo != null) {
                mPendingAddWidgetInfo = appWidgetInfo;
                mPendingAddInfo.copyFrom(info);
                mPendingAddWidgetId = widgetId;

                AppWidgetManagerCompat.getInstance(this).startConfigActivity(appWidgetInfo, info.appWidgetId, this,
                        mAppWidgetHost, REQUEST_RECONFIGURE_APPWIDGET);
            }
        } else if (info.installProgress < 0) {
            // The install has not been queued
            startActivitySafely(v, LauncherModel.getMarketIntent(info.providerName.getPackageName()), info);
        } else {
            // Download has started.
            final String packageName = info.providerName.getPackageName();
            startActivitySafely(v, LauncherModel.getMarketIntent(packageName), info);
        }
    }

    /**
     * Event handler for the "grid" button that appears on the home screen, which
     * enters all apps mode.
     *
     * @param v The view that was clicked.
     */
    protected void onClickAllAppsButton(View v) {
        if (LOGD)
            Log.d(TAG, "onClickAllAppsButton");
        if (isAllAppsVisible()) {
            showWorkspace(true);
        } else {
            showAllApps(true, AppsCustomizePagedView.ContentType.Applications, false);
        }
    }

    /**
     * Event handler for an app shortcut click.
     *
     * @param v The view that was clicked. Must be a tagged with a {@link ShortcutInfo}.
     */
    protected void onClickAppShortcut(final View v) {
        if (LOGD)
            Log.d(TAG, "onClickAppShortcut");
        Object tag = v.getTag();
        if (!(tag instanceof ShortcutInfo)) {
            throw new IllegalArgumentException("Input must be a Shortcut");
        }

        // Open shortcut
        final ShortcutInfo shortcut = (ShortcutInfo) tag;

        if (shortcut.isDisabled != 0) {
            int error = R.string.activity_not_available;
            if ((shortcut.isDisabled & ShortcutInfo.FLAG_DISABLED_SAFEMODE) != 0) {
                error = R.string.safemode_shortcut_error;
            }
            Toast.makeText(this, error, Toast.LENGTH_SHORT).show();
            return;
        }

        // Start activities
        startAppShortcutOrInfoActivity(v);
    }

    private void startAppShortcutOrInfoActivity(View v) {
        Object tag = v.getTag();
        final ShortcutInfo shortcut;
        final Intent intent;
        if (tag instanceof ShortcutInfo) {
            shortcut = (ShortcutInfo) tag;
            intent = shortcut.intent;
            int[] pos = new int[2];
            v.getLocationOnScreen(pos);
            intent.setSourceBounds(new Rect(pos[0], pos[1], pos[0] + v.getWidth(), pos[1] + v.getHeight()));

        } else if (tag instanceof AppInfo) {
            shortcut = null;
            intent = ((AppInfo) tag).intent;
        } else {
            throw new IllegalArgumentException("Input must be a Shortcut or AppInfo");
        }

        boolean success = startActivitySafely(v, intent, tag);

        if (success && v instanceof BubbleTextView) {
            mWaitingForResume = (BubbleTextView) v;
            mWaitingForResume.setStayPressed(true);
        }
    }

    /**
     * Event handler for the (Add) Widgets button that appears after a long press
     * on the home screen.
     */
    protected void onClickAddWidgetButton(View view) {
        if (LOGD)
            Log.d(TAG, "onClickAddWidgetButton");
        if (mIsSafeModeEnabled) {
            Toast.makeText(this, R.string.safemode_widget_error, Toast.LENGTH_SHORT).show();
        } else {
            showAllApps(true, AppsCustomizePagedView.ContentType.Widgets, true);
        }
    }

    /**
     * Event handler for the settings button that appears after a long press
     * on the home screen.
     */
    protected void onClickSettingsButton(View v) {
        if (LOGD)
            Log.d(TAG, "onClickSettingsButton");

        final Intent launchSettings = new Intent(this, SettingsActivity.class);
        startActivity(launchSettings);
    }

    /**
     * Event handler for the wallpaper picker button that appears after a long press
     * on the home screen.
     */
    protected void onClickWallpaperPicker(View v) {
        if (LOGD)
            Log.d(TAG, "onClickWallpaperPicker");
        final Intent pickWallpaper = new Intent(Intent.ACTION_SET_WALLPAPER);
        startActivityForResult(pickWallpaper, REQUEST_PICK_WALLPAPER);
    }

    public View.OnTouchListener getHapticFeedbackTouchListener() {
        if (mHapticFeedbackTouchListener == null) {
            mHapticFeedbackTouchListener = new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    if ((event.getAction() & MotionEvent.ACTION_MASK) == MotionEvent.ACTION_DOWN) {
                        v.performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY);
                    }
                    return false;
                }
            };
        }
        return mHapticFeedbackTouchListener;
    }

    public void onDragStarted(View view) {
        moveWorkspaceToDefaultScreen();
    }

    void startApplicationDetailsActivity(ComponentName componentName, UserHandleCompat user) {
        try {
            LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(this);
            launcherApps.showAppDetailsForProfile(componentName, user);
        } catch (SecurityException e) {
            Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
            Log.e(TAG, "Launcher does not have permission to launch settings");
        } catch (ActivityNotFoundException e) {
            Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
            Log.e(TAG, "Unable to launch settings");
        }
    }

    // returns true if the activity was started
    boolean startApplicationUninstallActivity(ComponentName componentName, int flags, UserHandleCompat user) {
        if ((flags & AppInfo.DOWNLOADED_FLAG) == 0) {
            // System applications cannot be installed. For now, show a toast explaining that.
            // We may give them the option of disabling apps this way.
            int messageId = R.string.uninstall_system_app_text;
            Toast.makeText(this, messageId, Toast.LENGTH_SHORT).show();
            return false;
        } else {
            String packageName = componentName.getPackageName();
            String className = componentName.getClassName();
            Intent intent = new Intent(Intent.ACTION_DELETE, Uri.fromParts("package", packageName, className));
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
            if (user != null) {
                user.addToIntent(intent, Intent.EXTRA_USER);
            }
            startActivity(intent);
            return true;
        }
    }

    boolean startActivity(View v, Intent intent, Object tag) {
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        try {
            // Only launch using the new animation if the shortcut has not opted out (this is a
            // private contract between launcher and may be ignored in the future).
            boolean useLaunchAnimation = (v != null) && !intent.hasExtra(INTENT_EXTRA_IGNORE_LAUNCH_ANIMATION);
            LauncherAppsCompat launcherApps = LauncherAppsCompat.getInstance(this);
            UserManagerCompat userManager = UserManagerCompat.getInstance(this);

            UserHandleCompat user = null;
            if (intent.hasExtra(AppInfo.EXTRA_PROFILE)) {
                long serialNumber = intent.getLongExtra(AppInfo.EXTRA_PROFILE, -1);
                user = userManager.getUserForSerialNumber(serialNumber);
            }

            Bundle optsBundle = null;
            if (useLaunchAnimation) {
                ActivityOptions opts = Utilities.isLmpOrAbove()
                        ? ActivityOptions.makeCustomAnimation(this, R.anim.task_open_enter, R.anim.no_anim)
                        : ActivityOptions.makeScaleUpAnimation(v, 0, 0, v.getMeasuredWidth(),
                                v.getMeasuredHeight());
                optsBundle = opts.toBundle();
            }

            if (user == null || user.equals(UserHandleCompat.myUserHandle())) {
                // Could be launching some bookkeeping activity
                startActivity(intent, optsBundle);
            } else {
                // TODO Component can be null when shortcuts are supported for secondary user
                launcherApps.startActivityForProfile(intent.getComponent(), user, intent.getSourceBounds(),
                        optsBundle);
            }
            return true;
        } catch (SecurityException e) {
            Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
            Log.e(TAG, "Launcher does not have the permission to launch " + intent
                    + ". Make sure to create a MAIN intent-filter for the corresponding activity "
                    + "or use the exported attribute for this activity. " + "tag=" + tag + " intent=" + intent, e);
        }
        return false;
    }

    boolean startActivitySafely(View v, Intent intent, Object tag) {
        boolean success = false;
        if (mIsSafeModeEnabled && !Utilities.isSystemApp(this, intent)) {
            Toast.makeText(this, R.string.safemode_shortcut_error, Toast.LENGTH_SHORT).show();
            return false;
        }
        try {
            success = startActivity(v, intent, tag);
        } catch (ActivityNotFoundException e) {
            Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
            Log.e(TAG, "Unable to launch. tag=" + tag + " intent=" + intent, e);
        }
        return success;
    }

    public boolean onLongClick(View v) {
        if (!isDraggingEnabled())
            return false;
        if (isWorkspaceLocked())
            return false;
        if (mState != State.WORKSPACE)
            return false;

        if (v instanceof Workspace) {
            if (!mWorkspace.isInOverviewMode()) {
                if (mWorkspace.enterOverviewMode()) {
                    mWorkspace.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS,
                            HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING);
                    return true;
                } else {
                    return false;
                }
            } else {
                return false;
            }
        }

        CellLayout.CellInfo longClickCellInfo = null;
        View itemUnderLongClick = null;
        if (v.getTag() instanceof ItemInfo) {
            ItemInfo info = (ItemInfo) v.getTag();
            longClickCellInfo = new CellLayout.CellInfo(v, info);
            itemUnderLongClick = longClickCellInfo.cell;
            resetAddInfo();
        }

        if (!mDragController.isDragging()) {
            if (itemUnderLongClick == null) {
                // User long pressed on empty space
                mWorkspace.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS,
                        HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING);
                if (!mWorkspace.isInOverviewMode()) {
                    mWorkspace.enterOverviewMode();
                }
            } else {
                // User long pressed on an item
                mWorkspace.startDrag(longClickCellInfo);
            }
        }
        return true;
    }

    public boolean isAllAppsVisible() {
        return (mState == State.APPS_CUSTOMIZE) || (mOnResumeState == State.APPS_CUSTOMIZE);
    }

    private void setWorkspaceBackground(boolean workspace) {
        mLauncherView.setBackground(workspace ? mWorkspaceBackgroundDrawable : null);
    }

    private void dispatchOnLauncherTransitionPrepare(View v, boolean animated, boolean toWorkspace) {
        if (v instanceof LauncherTransitionable) {
            ((LauncherTransitionable) v).onLauncherTransitionPrepare(this, animated, toWorkspace);
        }
    }

    private void dispatchOnLauncherTransitionStart(View v, boolean animated, boolean toWorkspace) {
        if (v instanceof LauncherTransitionable) {
            ((LauncherTransitionable) v).onLauncherTransitionStart(this, animated, toWorkspace);
        }

        // Update the workspace transition step as well
        dispatchOnLauncherTransitionStep(v, 0f);
    }

    private void dispatchOnLauncherTransitionStep(View v, float t) {
        if (v instanceof LauncherTransitionable) {
            ((LauncherTransitionable) v).onLauncherTransitionStep(this, t);
        }
    }

    /**
     * Things to test when changing the following seven functions.
     *   - Home from workspace
     *          - from center screen
     *          - from other screens
     *   - Home from all apps
     *          - from center screen
     *          - from other screens
     *   - Back from all apps
     *          - from center screen
     *          - from other screens
     *   - Launch app from workspace and quit
     *          - with back
     *          - with home
     *   - Launch app from all apps and quit
     *          - with back
     *          - with home
     *   - Go to a screen that's not the default, then all
     *     apps, and launch and app, and go back
     *          - with back
     *          -with home
     *   - On workspace, long press power and go back
     *          - with back
     *          - with home
     *   - On all apps, long press power and go back
     *          - with back
     *          - with home
     *   - On workspace, power off
     *   - On all apps, power off
     *   - Launch an app and turn off the screen while in that app
     *          - Go back with home key
     *          - Go back with back key  TODO: make this not go to workspace
     *          - From all apps
     *          - From workspace
     *   - Enter and exit car mode (becuase it causes an extra configuration changed)
     *          - From all apps
     *          - From the center workspace
     *          - From another workspace
     */

    private void dispatchOnLauncherTransitionEnd(View v, boolean animated, boolean toWorkspace) {
        if (v instanceof LauncherTransitionable) {
            ((LauncherTransitionable) v).onLauncherTransitionEnd(this, animated, toWorkspace);
        }

        // Update the workspace transition step as well
        dispatchOnLauncherTransitionStep(v, 1f);
    }

    /**
     * Zoom the camera out from the workspace to reveal 'toView'.
     * Assumes that the view to show is anchored at either the very top or very bottom
     * of the screen.
     */
    private void showAppsCustomizeHelper(final boolean animated, final boolean springLoaded) {
        AppsCustomizePagedView.ContentType contentType = mAppsCustomizeContent.getContentType();
        showAppsCustomizeHelper(animated, springLoaded, contentType);
    }

    private void showAppsCustomizeHelper(final boolean animated, final boolean springLoaded,
            final AppsCustomizePagedView.ContentType contentType) {
        if (mStateAnimation != null) {
            mStateAnimation.setDuration(0);
            mStateAnimation.cancel();
            mStateAnimation = null;
        }

        boolean material = Utilities.isLmpOrAbove();

        final Resources res = getResources();

        final int revealDuration = res.getInteger(R.integer.config_appsCustomizeRevealTime);
        final int itemsAlphaStagger = res.getInteger(R.integer.config_appsCustomizeItemsAlphaStagger);

        final View fromView = mWorkspace;
        final AppsCustomizeTabHost toView = mAppsCustomizeTabHost;

        final ArrayList<View> layerViews = new ArrayList<View>();

        Workspace.State workspaceState = contentType == AppsCustomizePagedView.ContentType.Widgets
                ? Workspace.State.OVERVIEW_HIDDEN
                : Workspace.State.NORMAL_HIDDEN;
        Animator workspaceAnim = mWorkspace.getChangeStateAnimation(workspaceState, animated, layerViews);
        // Set the content type for the all apps/widgets space
        mAppsCustomizeTabHost.setContentTypeImmediate(contentType);

        // If for some reason our views aren't initialized, don't animate
        boolean initialized = getAllAppsButton() != null;

        if (animated && initialized) {
            mStateAnimation = LauncherAnimUtils.createAnimatorSet();
            final AppsCustomizePagedView content = (AppsCustomizePagedView) toView
                    .findViewById(R.id.apps_customize_pane_content);

            final View page = content.getPageAt(content.getCurrentPage());
            final View revealView = toView.findViewById(R.id.fake_page);

            final boolean isWidgetTray = contentType == AppsCustomizePagedView.ContentType.Widgets;
            revealView.setBackgroundColor(getResources().getColor(R.color.widget_text_panel));

            // Hide the real page background, and swap in the fake one
            content.setPageBackgroundsVisible(false);
            revealView.setVisibility(View.VISIBLE);
            // We need to hide this view as the animation start will be posted.
            revealView.setAlpha(0);

            int width = revealView.getMeasuredWidth();
            int height = revealView.getMeasuredHeight();
            float revealRadius = (float) Math.sqrt((width * width) / 4 + (height * height) / 4);

            revealView.setTranslationY(0);
            revealView.setTranslationX(0);

            // Get the y delta between the center of the page and the center of the all apps button
            int[] allAppsToPanelDelta = Utilities.getCenterDeltaInScreenSpace(revealView, getAllAppsButton(), null);

            float alpha = 0;
            float xDrift = 0;
            float yDrift = 0;
            if (material) {
                alpha = isWidgetTray ? 0.3f : 1f;
                yDrift = isWidgetTray ? height / 2 : allAppsToPanelDelta[1];
                xDrift = isWidgetTray ? 0 : allAppsToPanelDelta[0];
            } else {
                yDrift = 2 * height / 3;
                xDrift = 0;
            }
            final float initAlpha = alpha;

            revealView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
            layerViews.add(revealView);
            PropertyValuesHolder panelAlpha = PropertyValuesHolder.ofFloat("alpha", initAlpha, 1f);
            PropertyValuesHolder panelDriftY = PropertyValuesHolder.ofFloat("translationY", yDrift, 0);
            PropertyValuesHolder panelDriftX = PropertyValuesHolder.ofFloat("translationX", xDrift, 0);

            ObjectAnimator panelAlphaAndDrift = ObjectAnimator.ofPropertyValuesHolder(revealView, panelAlpha,
                    panelDriftY, panelDriftX);

            panelAlphaAndDrift.setDuration(revealDuration);
            panelAlphaAndDrift.setInterpolator(new LogDecelerateInterpolator(100, 0));

            mStateAnimation.play(panelAlphaAndDrift);

            if (page != null) {
                page.setVisibility(View.VISIBLE);
                page.setLayerType(View.LAYER_TYPE_HARDWARE, null);
                layerViews.add(page);

                ObjectAnimator pageDrift = ObjectAnimator.ofFloat(page, "translationY", yDrift, 0);
                page.setTranslationY(yDrift);
                pageDrift.setDuration(revealDuration);
                pageDrift.setInterpolator(new LogDecelerateInterpolator(100, 0));
                pageDrift.setStartDelay(itemsAlphaStagger);
                mStateAnimation.play(pageDrift);

                page.setAlpha(0f);
                ObjectAnimator itemsAlpha = ObjectAnimator.ofFloat(page, "alpha", 0f, 1f);
                itemsAlpha.setDuration(revealDuration);
                itemsAlpha.setInterpolator(new AccelerateInterpolator(1.5f));
                itemsAlpha.setStartDelay(itemsAlphaStagger);
                mStateAnimation.play(itemsAlpha);
            }

            View pageIndicators = toView.findViewById(R.id.apps_customize_page_indicator);
            pageIndicators.setAlpha(0.01f);
            ObjectAnimator indicatorsAlpha = ObjectAnimator.ofFloat(pageIndicators, "alpha", 1f);
            indicatorsAlpha.setDuration(revealDuration);
            mStateAnimation.play(indicatorsAlpha);

            if (material) {
                final View allApps = getAllAppsButton();
                int allAppsButtonSize = LauncherAppState.getInstance().getDynamicGrid()
                        .getDeviceProfile().allAppsButtonVisualSize;
                float startRadius = isWidgetTray ? 0 : allAppsButtonSize / 2;
                Animator reveal = ViewAnimationUtils.createCircularReveal(revealView, width / 2, height / 2,
                        startRadius, revealRadius);
                reveal.setDuration(revealDuration);
                reveal.setInterpolator(new LogDecelerateInterpolator(100, 0));

                reveal.addListener(new AnimatorListenerAdapter() {
                    public void onAnimationStart(Animator animation) {
                        if (!isWidgetTray) {
                            allApps.setVisibility(View.INVISIBLE);
                        }
                    }

                    public void onAnimationEnd(Animator animation) {
                        if (!isWidgetTray) {
                            allApps.setVisibility(View.VISIBLE);
                        }
                    }
                });
                mStateAnimation.play(reveal);
            }

            mStateAnimation.addListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationEnd(Animator animation) {
                    dispatchOnLauncherTransitionEnd(fromView, animated, false);
                    dispatchOnLauncherTransitionEnd(toView, animated, false);

                    revealView.setVisibility(View.INVISIBLE);
                    revealView.setLayerType(View.LAYER_TYPE_NONE, null);
                    if (page != null) {
                        page.setLayerType(View.LAYER_TYPE_NONE, null);
                    }
                    content.setPageBackgroundsVisible(true);

                    // This can hold unnecessary references to views.
                    mStateAnimation = null;
                }

            });

            if (workspaceAnim != null) {
                mStateAnimation.play(workspaceAnim);
            }

            dispatchOnLauncherTransitionPrepare(fromView, animated, false);
            dispatchOnLauncherTransitionPrepare(toView, animated, false);
            final AnimatorSet stateAnimation = mStateAnimation;
            final Runnable startAnimRunnable = new Runnable() {
                public void run() {
                    // Check that mStateAnimation hasn't changed while
                    // we waited for a layout/draw pass
                    if (mStateAnimation != stateAnimation)
                        return;
                    dispatchOnLauncherTransitionStart(fromView, animated, false);
                    dispatchOnLauncherTransitionStart(toView, animated, false);

                    revealView.setAlpha(initAlpha);
                    if (Utilities.isLmpOrAbove()) {
                        for (int i = 0; i < layerViews.size(); i++) {
                            View v = layerViews.get(i);
                            if (v != null) {
                                if (Utilities.isViewAttachedToWindow(v))
                                    v.buildLayer();
                            }
                        }
                    }
                    mStateAnimation.start();
                }
            };
            toView.bringToFront();
            toView.setVisibility(View.VISIBLE);
            toView.post(startAnimRunnable);
        } else {
            toView.setTranslationX(0.0f);
            toView.setTranslationY(0.0f);
            toView.setScaleX(1.0f);
            toView.setScaleY(1.0f);
            toView.setVisibility(View.VISIBLE);
            toView.bringToFront();

            dispatchOnLauncherTransitionPrepare(fromView, animated, false);
            dispatchOnLauncherTransitionStart(fromView, animated, false);
            dispatchOnLauncherTransitionEnd(fromView, animated, false);
            dispatchOnLauncherTransitionPrepare(toView, animated, false);
            dispatchOnLauncherTransitionStart(toView, animated, false);
            dispatchOnLauncherTransitionEnd(toView, animated, false);
        }
    }

    /**
     * Zoom the camera back into the workspace, hiding 'fromView'.
     * This is the opposite of showAppsCustomizeHelper.
     *
     * @param animated If true, the transition will be animated.
     */
    private void hideAppsCustomizeHelper(Workspace.State toState, final boolean animated,
            final boolean springLoaded, final Runnable onCompleteRunnable) {

        if (mStateAnimation != null) {
            mStateAnimation.setDuration(0);
            mStateAnimation.cancel();
            mStateAnimation = null;
        }

        boolean material = Utilities.isLmpOrAbove();
        Resources res = getResources();

        final int revealDuration = res.getInteger(R.integer.config_appsCustomizeConcealTime);
        final int itemsAlphaStagger = res.getInteger(R.integer.config_appsCustomizeItemsAlphaStagger);

        final View fromView = mAppsCustomizeTabHost;
        final View toView = mWorkspace;
        Animator workspaceAnim = null;
        final ArrayList<View> layerViews = new ArrayList<View>();

        if (toState == Workspace.State.NORMAL) {
            workspaceAnim = mWorkspace.getChangeStateAnimation(toState, animated, layerViews);
        } else if (toState == Workspace.State.SPRING_LOADED || toState == Workspace.State.OVERVIEW) {
            workspaceAnim = mWorkspace.getChangeStateAnimation(toState, animated, layerViews);
        }

        // If for some reason our views aren't initialized, don't animate
        boolean initialized = getAllAppsButton() != null;

        if (animated && initialized) {
            mStateAnimation = LauncherAnimUtils.createAnimatorSet();
            if (workspaceAnim != null) {
                mStateAnimation.play(workspaceAnim);
            }

            final AppsCustomizePagedView content = (AppsCustomizePagedView) fromView
                    .findViewById(R.id.apps_customize_pane_content);

            final View page = content.getPageAt(content.getNextPage());

            // We need to hide side pages of the Apps / Widget tray to avoid some ugly edge cases
            int count = content.getChildCount();
            for (int i = 0; i < count; i++) {
                View child = content.getChildAt(i);
                if (child != page) {
                    child.setVisibility(View.INVISIBLE);
                }
            }
            final View revealView = fromView.findViewById(R.id.fake_page);

            // hideAppsCustomizeHelper is called in some cases when it is already hidden
            // don't perform all these no-op animations. In particularly, this was causing
            // the all-apps button to pop in and out.
            if (fromView.getVisibility() == View.VISIBLE) {
                AppsCustomizePagedView.ContentType contentType = content.getContentType();
                final boolean isWidgetTray = contentType == AppsCustomizePagedView.ContentType.Widgets;

                revealView.setBackgroundColor(getResources().getColor(R.color.widget_text_panel));

                int width = revealView.getMeasuredWidth();
                int height = revealView.getMeasuredHeight();
                float revealRadius = (float) Math.sqrt((width * width) / 4 + (height * height) / 4);

                // Hide the real page background, and swap in the fake one
                revealView.setVisibility(View.VISIBLE);
                content.setPageBackgroundsVisible(false);

                final View allAppsButton = getAllAppsButton();
                revealView.setTranslationY(0);
                int[] allAppsToPanelDelta = Utilities.getCenterDeltaInScreenSpace(revealView, allAppsButton, null);

                float xDrift = 0;
                float yDrift = 0;
                if (material) {
                    yDrift = isWidgetTray ? height / 2 : allAppsToPanelDelta[1];
                    xDrift = isWidgetTray ? 0 : allAppsToPanelDelta[0];
                } else {
                    yDrift = 2 * height / 3;
                    xDrift = 0;
                }

                revealView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
                TimeInterpolator decelerateInterpolator = material ? new LogDecelerateInterpolator(100, 0)
                        : new DecelerateInterpolator(1f);

                // The vertical motion of the apps panel should be delayed by one frame
                // from the conceal animation in order to give the right feel. We correpsondingly
                // shorten the duration so that the slide and conceal end at the same time.
                ObjectAnimator panelDriftY = LauncherAnimUtils.ofFloat(revealView, "translationY", 0, yDrift);
                panelDriftY.setDuration(revealDuration - SINGLE_FRAME_DELAY);
                panelDriftY.setStartDelay(itemsAlphaStagger + SINGLE_FRAME_DELAY);
                panelDriftY.setInterpolator(decelerateInterpolator);
                mStateAnimation.play(panelDriftY);

                ObjectAnimator panelDriftX = LauncherAnimUtils.ofFloat(revealView, "translationX", 0, xDrift);
                panelDriftX.setDuration(revealDuration - SINGLE_FRAME_DELAY);
                panelDriftX.setStartDelay(itemsAlphaStagger + SINGLE_FRAME_DELAY);
                panelDriftX.setInterpolator(decelerateInterpolator);
                mStateAnimation.play(panelDriftX);

                if (isWidgetTray || !material) {
                    float finalAlpha = material ? 0.4f : 0f;
                    revealView.setAlpha(1f);
                    ObjectAnimator panelAlpha = LauncherAnimUtils.ofFloat(revealView, "alpha", 1f, finalAlpha);
                    panelAlpha.setDuration(material ? revealDuration : 150);
                    panelAlpha.setInterpolator(decelerateInterpolator);
                    panelAlpha.setStartDelay(material ? 0 : itemsAlphaStagger + SINGLE_FRAME_DELAY);
                    mStateAnimation.play(panelAlpha);
                }

                if (page != null) {
                    page.setLayerType(View.LAYER_TYPE_HARDWARE, null);

                    ObjectAnimator pageDrift = LauncherAnimUtils.ofFloat(page, "translationY", 0, yDrift);
                    page.setTranslationY(0);
                    pageDrift.setDuration(revealDuration - SINGLE_FRAME_DELAY);
                    pageDrift.setInterpolator(decelerateInterpolator);
                    pageDrift.setStartDelay(itemsAlphaStagger + SINGLE_FRAME_DELAY);
                    mStateAnimation.play(pageDrift);

                    page.setAlpha(1f);
                    ObjectAnimator itemsAlpha = LauncherAnimUtils.ofFloat(page, "alpha", 1f, 0f);
                    itemsAlpha.setDuration(100);
                    itemsAlpha.setInterpolator(decelerateInterpolator);
                    mStateAnimation.play(itemsAlpha);
                }

                View pageIndicators = fromView.findViewById(R.id.apps_customize_page_indicator);
                pageIndicators.setAlpha(1f);
                ObjectAnimator indicatorsAlpha = LauncherAnimUtils.ofFloat(pageIndicators, "alpha", 0f);
                indicatorsAlpha.setDuration(revealDuration);
                indicatorsAlpha.setInterpolator(new DecelerateInterpolator(1.5f));
                mStateAnimation.play(indicatorsAlpha);

                width = revealView.getMeasuredWidth();

                if (material) {
                    if (!isWidgetTray) {
                        allAppsButton.setVisibility(View.INVISIBLE);
                    }
                    int allAppsButtonSize = LauncherAppState.getInstance().getDynamicGrid()
                            .getDeviceProfile().allAppsButtonVisualSize;
                    float finalRadius = isWidgetTray ? 0 : allAppsButtonSize / 2;
                    Animator reveal = LauncherAnimUtils.createCircularReveal(revealView, width / 2, height / 2,
                            revealRadius, finalRadius);
                    reveal.setInterpolator(new LogDecelerateInterpolator(100, 0));
                    reveal.setDuration(revealDuration);
                    reveal.setStartDelay(itemsAlphaStagger);

                    reveal.addListener(new AnimatorListenerAdapter() {
                        public void onAnimationEnd(Animator animation) {
                            revealView.setVisibility(View.INVISIBLE);
                            if (!isWidgetTray) {
                                allAppsButton.setVisibility(View.VISIBLE);
                            }
                        }
                    });

                    mStateAnimation.play(reveal);
                }

                dispatchOnLauncherTransitionPrepare(fromView, animated, true);
                dispatchOnLauncherTransitionPrepare(toView, animated, true);
                mAppsCustomizeContent.stopScrolling();
            }

            mStateAnimation.addListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationEnd(Animator animation) {
                    fromView.setVisibility(View.GONE);
                    dispatchOnLauncherTransitionEnd(fromView, animated, true);
                    dispatchOnLauncherTransitionEnd(toView, animated, true);
                    if (onCompleteRunnable != null) {
                        onCompleteRunnable.run();
                    }

                    revealView.setLayerType(View.LAYER_TYPE_NONE, null);
                    if (page != null) {
                        page.setLayerType(View.LAYER_TYPE_NONE, null);
                    }
                    content.setPageBackgroundsVisible(true);
                    // Unhide side pages
                    int count = content.getChildCount();
                    for (int i = 0; i < count; i++) {
                        View child = content.getChildAt(i);
                        child.setVisibility(View.VISIBLE);
                    }

                    // Reset page transforms
                    if (page != null) {
                        page.setTranslationX(0);
                        page.setTranslationY(0);
                        page.setAlpha(1);
                    }
                    content.setCurrentPage(content.getNextPage());

                    mAppsCustomizeContent.updateCurrentPageScroll();

                    // This can hold unnecessary references to views.
                    mStateAnimation = null;
                }
            });

            final AnimatorSet stateAnimation = mStateAnimation;
            final Runnable startAnimRunnable = new Runnable() {
                public void run() {
                    // Check that mStateAnimation hasn't changed while
                    // we waited for a layout/draw pass
                    if (mStateAnimation != stateAnimation)
                        return;
                    dispatchOnLauncherTransitionStart(fromView, animated, false);
                    dispatchOnLauncherTransitionStart(toView, animated, false);

                    if (Utilities.isLmpOrAbove()) {
                        for (int i = 0; i < layerViews.size(); i++) {
                            View v = layerViews.get(i);
                            if (v != null) {
                                if (Utilities.isViewAttachedToWindow(v))
                                    v.buildLayer();
                            }
                        }
                    }
                    mStateAnimation.start();
                }
            };
            fromView.post(startAnimRunnable);
        } else {
            fromView.setVisibility(View.GONE);
            dispatchOnLauncherTransitionPrepare(fromView, animated, true);
            dispatchOnLauncherTransitionStart(fromView, animated, true);
            dispatchOnLauncherTransitionEnd(fromView, animated, true);
            dispatchOnLauncherTransitionPrepare(toView, animated, true);
            dispatchOnLauncherTransitionStart(toView, animated, true);
            dispatchOnLauncherTransitionEnd(toView, animated, true);
        }
    }

    @Override
    public void onTrimMemory(int level) {
        super.onTrimMemory(level);
        if (level >= ComponentCallbacks2.TRIM_MEMORY_UI_HIDDEN) {
            // The widget preview db can result in holding onto over
            // 3MB of memory for caching which isn't necessary.
            SQLiteDatabase.releaseMemory();

            // This clears all widget bitmaps from the widget tray
            if (mAppsCustomizeTabHost != null) {
                mAppsCustomizeTabHost.trimMemory();
            }
        }
    }

    protected void showWorkspace(boolean animated) {
        showWorkspace(animated, null);
    }

    void showWorkspace(boolean animated, Runnable onCompleteRunnable) {
        if (mState != State.WORKSPACE || mWorkspace.getState() != Workspace.State.NORMAL) {
            mWorkspace.setVisibility(View.VISIBLE);
            hideAppsCustomizeHelper(Workspace.State.NORMAL, animated, false, onCompleteRunnable);

            // Set focus to the AppsCustomize button
            if (mAllAppsButton != null) {
                mAllAppsButton.requestFocus();
            }
        }

        // Change the state *after* we've called all the transition code
        mState = State.WORKSPACE;

        // Resume the auto-advance of widgets
        mUserPresent = true;
        updateRunning();

        // Send an accessibility event to announce the context change
        getWindow().getDecorView().sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);

        onWorkspaceShown(animated);
    }

    void showOverviewMode(boolean animated) {
        mWorkspace.setVisibility(View.VISIBLE);
        hideAppsCustomizeHelper(Workspace.State.OVERVIEW, animated, false, null);
        mState = State.WORKSPACE;
        onWorkspaceShown(animated);
    }

    public void onWorkspaceShown(boolean animated) {
    }

    void showAllApps(boolean animated, AppsCustomizePagedView.ContentType contentType, boolean resetPageToZero) {
        if (mState != State.WORKSPACE)
            return;

        if (resetPageToZero) {
            mAppsCustomizeTabHost.reset();
        }
        showAppsCustomizeHelper(animated, false, contentType);
        mAppsCustomizeTabHost.post(new Runnable() {
            @Override
            public void run() {
                // We post this in-case the all apps view isn't yet constructed.
                mAppsCustomizeTabHost.requestFocus();
            }
        });

        // Change the state *after* we've called all the transition code
        mState = State.APPS_CUSTOMIZE;

        // Pause the auto-advance of widgets until we are out of AllApps
        mUserPresent = false;
        updateRunning();

        // Send an accessibility event to announce the context change
        getWindow().getDecorView().sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
    }

    void enterSpringLoadedDragMode() {
        if (isAllAppsVisible()) {
            hideAppsCustomizeHelper(Workspace.State.SPRING_LOADED, true, true, null);
            mState = State.APPS_CUSTOMIZE_SPRING_LOADED;
        }
    }

    void exitSpringLoadedDragModeDelayed(final boolean successfulDrop, int delay,
            final Runnable onCompleteRunnable) {
        if (mState != State.APPS_CUSTOMIZE_SPRING_LOADED)
            return;

        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                if (successfulDrop) {
                    // Before we show workspace, hide all apps again because
                    // exitSpringLoadedDragMode made it visible. This is a bit hacky; we should
                    // clean up our state transition functions
                    mAppsCustomizeTabHost.setVisibility(View.GONE);
                    showWorkspace(true, onCompleteRunnable);
                } else {
                    exitSpringLoadedDragMode();
                }
            }
        }, delay);
    }

    void exitSpringLoadedDragMode() {
        if (mState == State.APPS_CUSTOMIZE_SPRING_LOADED) {
            final boolean animated = true;
            final boolean springLoaded = true;
            showAppsCustomizeHelper(animated, springLoaded);
            mState = State.APPS_CUSTOMIZE;
        }
        // Otherwise, we are not in spring loaded mode, so don't do anything.
    }

    @Override
    public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
        final boolean result = super.dispatchPopulateAccessibilityEvent(event);
        final List<CharSequence> text = event.getText();
        text.clear();
        // Populate event with a fake title based on the current state.
        if (mState == State.APPS_CUSTOMIZE) {
            text.add(mAppsCustomizeTabHost.getContentTag());
        } else {
            text.add(getString(R.string.all_apps_home_button_label));
        }
        return result;
    }

    /**
     * If the activity is currently paused, signal that we need to run the passed Runnable
     * in onResume.
     * <p/>
     * This needs to be called from incoming places where resources might have been loaded
     * while we are paused.  That is becaues the Configuration might be wrong
     * when we're not running, and if it comes back to what it was when we
     * were paused, we are not restarted.
     * <p/>
     * Implementation of the method from LauncherModel.Callbacks.
     *
     * @return true if we are currently paused.  The caller might be able to
     * skip some work in that case since we will come back again.
     */
    private boolean waitUntilResume(Runnable run, boolean deletePreviousRunnables) {
        if (mPaused) {
            Log.i(TAG, "Deferring update until onResume");
            if (deletePreviousRunnables) {
                while (mBindOnResumeCallbacks.remove(run)) {
                }
            }
            mBindOnResumeCallbacks.add(run);
            return true;
        } else {
            return false;
        }
    }

    private boolean waitUntilResume(Runnable run) {
        return waitUntilResume(run, false);
    }

    public void addOnResumeCallback(Runnable run) {
        mOnResumeCallbacks.add(run);
    }

    /**
     * If the activity is currently paused, signal that we need to re-run the loader
     * in onResume.
     * <p/>
     * This needs to be called from incoming places where resources might have been loaded
     * while we are paused.  That is becaues the Configuration might be wrong
     * when we're not running, and if it comes back to what it was when we
     * were paused, we are not restarted.
     * <p/>
     * Implementation of the method from LauncherModel.Callbacks.
     *
     * @return true if we are currently paused.  The caller might be able to
     * skip some work in that case since we will come back again.
     */
    public boolean setLoadOnResume() {
        if (mPaused) {
            Log.i(TAG, "setLoadOnResume");
            mOnResumeNeedsLoad = true;
            return true;
        } else {
            return false;
        }
    }

    /**
     * Refreshes the shortcuts shown on the workspace.
     * <p/>
     * Implementation of the method from LauncherModel.Callbacks.
     */
    public void startBinding() {
        setWorkspaceLoading(true);

        // If we're starting binding all over again, clear any bind calls we'd postponed in
        // the past (see waitUntilResume) -- we don't need them since we're starting binding
        // from scratch again
        mBindOnResumeCallbacks.clear();

        // Clear the workspace because it's going to be rebound
        mWorkspace.clearDropTargets();
        mWorkspace.removeAllWorkspace();

        mWidgetsToAdvance.clear();
    }

    @Override
    public void bindDefaultScreen() {
        // Log to disk
        Log.d(TAG, "11683562 - bindDefaultScreen()");
        mWorkspace.addNewWorkspace();
    }

    public void bindAppsAdded(final long newScreen, final ArrayList<ItemInfo> addNotAnimated,
            final ArrayList<ItemInfo> addAnimated, final ArrayList<AppInfo> addedApps) {
        Runnable r = new Runnable() {
            public void run() {
                bindAppsAdded(newScreen, addNotAnimated, addAnimated, addedApps);
            }
        };
        if (waitUntilResume(r)) {
            return;
        }

        // Add the new screen
        bindDefaultScreen();

        // We add the items without animation on non-visible pages, and with
        // animations on the new page (which we will try and snap to).
        if (addNotAnimated != null && !addNotAnimated.isEmpty()) {
            bindItems(addNotAnimated, 0, addNotAnimated.size(), false);
        }
        if (addAnimated != null && !addAnimated.isEmpty()) {
            bindItems(addAnimated, 0, addAnimated.size(), true);
        }

        if (addedApps != null && mAppsCustomizeContent != null) {
            mAppsCustomizeContent.addApps(addedApps);
        }
    }

    /**
     * Bind the items start-end from the list.
     * <p/>
     * Implementation of the method from LauncherModel.Callbacks.
     */
    public void bindItems(final ArrayList<ItemInfo> shortcuts, final int start, final int end,
            final boolean forceAnimateIcons) {
        Runnable r = new Runnable() {
            public void run() {
                bindItems(shortcuts, start, end, forceAnimateIcons);
            }
        };
        if (waitUntilResume(r)) {
            return;
        }

        Workspace workspace = mWorkspace;
        for (int i = start; i < end; i++) {
            final ItemInfo item = shortcuts.get(i);

            switch (item.itemType) {
            case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION:
            case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:
                ShortcutInfo info = (ShortcutInfo) item;
                View shortcut = createShortcut(info);

                workspace.addInScreenFromBind(shortcut, item.container, item.cellX, item.cellY, 1, 1);
                break;
            default:
                throw new RuntimeException("Invalid Item Type");
            }
        }

        workspace.requestLayout();
    }

    /**
     * Add the views for a widget to the workspace.
     * <p/>
     * Implementation of the method from LauncherModel.Callbacks.
     */
    public void bindAppWidget(final LauncherAppWidgetInfo item) {
        Runnable r = new Runnable() {
            public void run() {
                bindAppWidget(item);
            }
        };
        if (waitUntilResume(r)) {
            return;
        }

        final long start = DEBUG_WIDGETS ? SystemClock.uptimeMillis() : 0;
        if (DEBUG_WIDGETS) {
            Log.d(TAG, "bindAppWidget: " + item);
        }
        final Workspace workspace = mWorkspace;

        AppWidgetProviderInfo appWidgetInfo;
        if (!mIsSafeModeEnabled && ((item.restoreStatus & LauncherAppWidgetInfo.FLAG_PROVIDER_NOT_READY) == 0)
                && ((item.restoreStatus & LauncherAppWidgetInfo.FLAG_ID_NOT_VALID) != 0)) {

            appWidgetInfo = LauncherModel.findAppWidgetProviderInfoWithComponent(this, item.providerName);
            if (appWidgetInfo == null) {
                if (DEBUG_WIDGETS) {
                    Log.d(TAG, "Removing restored widget: id=" + item.appWidgetId + " belongs to component "
                            + item.providerName + ", as the povider is null");
                }
                LauncherModel.deleteItemFromDatabase(this, item);
                return;
            }
            // Note: This assumes that the id remap broadcast is received before this step.
            // If that is not the case, the id remap will be ignored and user may see the
            // click to setup view.
            PendingAddWidgetInfo pendingInfo = new PendingAddWidgetInfo(appWidgetInfo, null, null);
            pendingInfo.spanX = item.spanX;
            pendingInfo.spanY = item.spanY;
            pendingInfo.minSpanX = item.minSpanX;
            pendingInfo.minSpanY = item.minSpanY;
            Bundle options = AppsCustomizePagedView.getDefaultOptionsForWidget(this, pendingInfo);

            int newWidgetId = mAppWidgetHost.allocateAppWidgetId();
            boolean success = mAppWidgetManager.bindAppWidgetIdIfAllowed(newWidgetId, appWidgetInfo, options);

            // TODO consider showing a permission dialog when the widget is clicked.
            if (!success) {
                mAppWidgetHost.deleteAppWidgetId(newWidgetId);
                if (DEBUG_WIDGETS) {
                    Log.d(TAG, "Removing restored widget: id=" + item.appWidgetId + " belongs to component "
                            + item.providerName + ", as the launcher is unable to bing a new widget id");
                }
                LauncherModel.deleteItemFromDatabase(this, item);
                return;
            }

            item.appWidgetId = newWidgetId;

            // If the widget has a configure activity, it is still needs to set it up, otherwise
            // the widget is ready to go.
            item.restoreStatus = (appWidgetInfo.configure == null) ? LauncherAppWidgetInfo.RESTORE_COMPLETED
                    : LauncherAppWidgetInfo.FLAG_UI_NOT_READY;

            LauncherModel.updateItemInDatabase(this, item);
        }

        if (!mIsSafeModeEnabled && item.restoreStatus == LauncherAppWidgetInfo.RESTORE_COMPLETED) {
            final int appWidgetId = item.appWidgetId;
            appWidgetInfo = mAppWidgetManager.getAppWidgetInfo(appWidgetId);
            if (DEBUG_WIDGETS) {
                Log.d(TAG, "bindAppWidget: id=" + item.appWidgetId + " belongs to component "
                        + appWidgetInfo.provider);
            }

            item.hostView = mAppWidgetHost.createView(this, appWidgetId, appWidgetInfo);
        } else {
            appWidgetInfo = null;
            PendingAppWidgetHostView view = new PendingAppWidgetHostView(this, item, mIsSafeModeEnabled);
            view.updateIcon(mIconCache);
            item.hostView = view;
            item.hostView.updateAppWidget(null);
            item.hostView.setOnClickListener(this);
        }

        item.hostView.setTag(item);
        item.onBindAppWidget(this);

        workspace.addInScreen(item.hostView, item.container, item.cellX, item.cellY, item.spanX, item.spanY, false);
        addWidgetToAutoAdvanceIfNeeded(item.hostView, appWidgetInfo);

        workspace.requestLayout();

        if (DEBUG_WIDGETS) {
            Log.d(TAG,
                    "bound widget id=" + item.appWidgetId + " in " + (SystemClock.uptimeMillis() - start) + "ms");
        }
    }

    /**
     * Restores a pending widget.
     *
     * @param appWidgetId The app widget id
     */
    private void completeRestoreAppWidget(final int appWidgetId) {
        LauncherAppWidgetHostView view = mWorkspace.getWidgetForAppWidgetId(appWidgetId);
        if ((view == null) || !(view instanceof PendingAppWidgetHostView)) {
            Log.e(TAG, "Widget update called, when the widget no longer exists.");
            return;
        }

        LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) view.getTag();
        info.restoreStatus = LauncherAppWidgetInfo.RESTORE_COMPLETED;

        mWorkspace.reinflateWidgetsIfNecessary();
        LauncherModel.updateItemInDatabase(this, info);
    }

    /**
     * Callback saying that there aren't any more items to bind.
     * <p/>
     * Implementation of the method from LauncherModel.Callbacks.
     */
    public void finishBindingItems() {
        Runnable r = new Runnable() {
            public void run() {
                finishBindingItems();
            }
        };
        if (waitUntilResume(r)) {
            return;
        }
        if (mSavedState != null) {
            if (!mWorkspace.hasFocus()) {
                mWorkspace.requestFocus();
            }
            mSavedState = null;
        }

        setWorkspaceLoading(false);

        // If we received the result of any pending adds while the loader was running (e.g. the
        // widget configuration forced an orientation change), process them now.
        if (sPendingAddItem != null) {
            completeAdd(sPendingAddItem);
            sPendingAddItem = null;
        }
    }

    /**
     * Add the icons for all apps.
     * <p/>
     * Implementation of the method from LauncherModel.Callbacks.
     */
    public void bindAllApplications(final ArrayList<AppInfo> apps) {
        Runnable r = new Runnable() {
            public void run() {
                bindAllApplications(apps);
            }
        };
        if (waitUntilResume(r)) {
            return;
        }

        if (mAppsCustomizeContent != null) {
            mAppsCustomizeContent.setApps(apps);
            mAppsCustomizeContent.onPackagesUpdated(LauncherModel.getSortedWidgets(this));
        }
    }

    /**
     * A package was updated.
     * <p/>
     * Implementation of the method from LauncherModel.Callbacks.
     */
    public void bindAppsUpdated(final ArrayList<AppInfo> apps) {
        Runnable r = new Runnable() {
            public void run() {
                bindAppsUpdated(apps);
            }
        };
        if (waitUntilResume(r)) {
            return;
        }

        if (mAppsCustomizeContent != null) {
            mAppsCustomizeContent.updateApps(apps);
        }
    }

    @Override
    public void bindWidgetsRestored(final ArrayList<LauncherAppWidgetInfo> widgets) {
        Runnable r = new Runnable() {
            public void run() {
                bindWidgetsRestored(widgets);
            }
        };
        if (waitUntilResume(r)) {
            return;
        }
        mWorkspace.widgetsRestored(widgets);
    }

    /**
     * Some shortcuts were updated in the background.
     * <p/>
     * Implementation of the method from LauncherModel.Callbacks.
     */
    @Override
    public void bindShortcutsChanged(final ArrayList<ShortcutInfo> updated, final ArrayList<ShortcutInfo> removed,
            final UserHandleCompat user) {
        Runnable r = new Runnable() {
            public void run() {
                bindShortcutsChanged(updated, removed, user);
            }
        };
        if (waitUntilResume(r)) {
            return;
        }

        if (updated != null && !updated.isEmpty()) {
            mWorkspace.updateShortcuts(updated);
        }

        if (removed != null && !removed.isEmpty()) {
            HashSet<ComponentName> removedComponents = new HashSet<ComponentName>();
            for (ShortcutInfo si : removed) {
                removedComponents.add(si.getTargetComponent());
            }
            mWorkspace.removeItemsByComponentName(removedComponents, user);
            // Notify the drag controller
            mDragController.onAppsRemoved(new ArrayList<String>(), removedComponents);
        }
    }

    /**
     * A package was uninstalled.  We take both the super set of packageNames
     * in addition to specific applications to remove, the reason being that
     * this can be called when a package is updated as well.  In that scenario,
     * we only remove specific components from the workspace, where as
     * package-removal should clear all items by package name.
     *
     * @param reason if non-zero, the icons are not permanently removed, rather marked as disabled.
     *               Implementation of the method from LauncherModel.Callbacks.
     */
    @Override
    public void bindComponentsRemoved(final ArrayList<String> packageNames, final ArrayList<AppInfo> appInfos,
            final UserHandleCompat user, final int reason) {
        Runnable r = new Runnable() {
            public void run() {
                bindComponentsRemoved(packageNames, appInfos, user, reason);
            }
        };
        if (waitUntilResume(r)) {
            return;
        }

        if (reason == 0) {
            HashSet<ComponentName> removedComponents = new HashSet<ComponentName>();
            for (AppInfo info : appInfos) {
                removedComponents.add(info.componentName);
            }
            if (!packageNames.isEmpty()) {
                mWorkspace.removeItemsByPackageName(packageNames, user);
            }
            if (!removedComponents.isEmpty()) {
                mWorkspace.removeItemsByComponentName(removedComponents, user);
            }
            // Notify the drag controller
            mDragController.onAppsRemoved(packageNames, removedComponents);

        } else {
            mWorkspace.disableShortcutsByPackageName(packageNames, user, reason);
        }

        // Update AllApps
        if (mAppsCustomizeContent != null) {
            mAppsCustomizeContent.removeApps(appInfos);
        }
    }

    public void bindPackagesUpdated(final ArrayList<Object> widgetsAndShortcuts) {
        if (waitUntilResume(mBindPackagesUpdatedRunnable, true)) {
            mWidgetsAndShortcuts = widgetsAndShortcuts;
            return;
        }

        // Update the widgets pane
        if (mAppsCustomizeContent != null) {
            mAppsCustomizeContent.onPackagesUpdated(widgetsAndShortcuts);
        }
    }

    public void lockScreenOrientation(int orientation) {
        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.JELLY_BEAN_MR2) {
            setRequestedOrientation(orientation);
        } else {
            //noinspection ResourceType
            setRequestedOrientation(orientation | ActivityInfo.SCREEN_ORIENTATION_LOCKED);
        }
    }

    public void unlockScreenOrientation(boolean immediate) {
        if (Utilities.isRotationEnabled(this)) {
            if (immediate) {
                setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
            } else {
                int restoreScreenOrientationDelay = 500;
                mHandler.postDelayed(new Runnable() {
                    public void run() {
                        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
                    }
                }, restoreScreenOrientationDelay);
            }
        } else {
            lockScreenOrientation(mLastOrientation);
        }
    }

    protected void moveWorkspaceToDefaultScreen() {
        mWorkspace.requestFocus();
    }

    /**
     * The different states that Launcher can be in.
     */
    private enum State {
        NONE, WORKSPACE, APPS_CUSTOMIZE, APPS_CUSTOMIZE_SPRING_LOADED
    }

    private static class PendingAddArguments {
        int requestCode;
        Intent intent;
        long container;
        int cellX;
        int cellY;
        int appWidgetId;
    }

    private static class LocaleConfiguration {
        public String locale;
        public int mcc = -1;
        public int mnc = -1;
    }

    /**
     * Receives notifications when system dialogs are to be closed.
     */
    private class CloseSystemDialogsIntentReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            closeSystemDialogs();
        }
    }

    /**
     * Receives notifications whenever the appwidgets are reset.
     */
    private class AppWidgetResetObserver extends ContentObserver {
        public AppWidgetResetObserver() {
            super(new Handler());
        }

        @Override
        public void onChange(boolean selfChange) {
            onAppWidgetReset();
        }
    }
}