Java tutorial
/* * Copyright (C) 2008 The Android Open Source Project * * 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.llf.android.launcher3; import java.util.ArrayList; import java.util.HashSet; import java.util.Iterator; import java.util.Set; import org.json.JSONObject; import org.json.JSONStringer; import org.json.JSONTokener; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.ActivityInfo; import android.content.pm.PackageManager; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.util.Base64; import android.util.Log; import android.widget.Toast; import com.llf.launcher.R; public class InstallShortcutReceiver extends BroadcastReceiver { private static final String TAG = "InstallShortcutReceiver"; private static final boolean DBG = false; public static final String ACTION_INSTALL_SHORTCUT = "com.android.launcher.action.INSTALL_SHORTCUT"; public static final String DATA_INTENT_KEY = "intent.data"; public static final String LAUNCH_INTENT_KEY = "intent.launch"; public static final String NAME_KEY = "name"; public static final String ICON_KEY = "icon"; public static final String ICON_RESOURCE_NAME_KEY = "iconResource"; public static final String ICON_RESOURCE_PACKAGE_NAME_KEY = "iconResourcePackage"; // The set of shortcuts that are pending install public static final String APPS_PENDING_INSTALL = "apps_to_install"; public static final int NEW_SHORTCUT_BOUNCE_DURATION = 450; public static final int NEW_SHORTCUT_STAGGER_DELAY = 85; private static final int INSTALL_SHORTCUT_SUCCESSFUL = 0; private static final int INSTALL_SHORTCUT_IS_DUPLICATE = -1; // A mime-type representing shortcut data public static final String SHORTCUT_MIMETYPE = "com.android.launcher3/shortcut"; private static Object sLock = new Object(); private static void addToStringSet(SharedPreferences sharedPrefs, SharedPreferences.Editor editor, String key, String value) { Set<String> strings = sharedPrefs.getStringSet(key, null); if (strings == null) { strings = new HashSet<String>(0); } else { strings = new HashSet<String>(strings); } strings.add(value); editor.putStringSet(key, strings); } private static void addToInstallQueue(SharedPreferences sharedPrefs, PendingInstallShortcutInfo info) { synchronized (sLock) { try { JSONStringer json = new JSONStringer().object().key(DATA_INTENT_KEY).value(info.data.toUri(0)) .key(LAUNCH_INTENT_KEY).value(info.launchIntent.toUri(0)).key(NAME_KEY).value(info.name); if (info.icon != null) { byte[] iconByteArray = ItemInfo.flattenBitmap(info.icon); json = json.key(ICON_KEY) .value(Base64.encodeToString(iconByteArray, 0, iconByteArray.length, Base64.DEFAULT)); } if (info.iconResource != null) { json = json.key(ICON_RESOURCE_NAME_KEY).value(info.iconResource.resourceName); json = json.key(ICON_RESOURCE_PACKAGE_NAME_KEY).value(info.iconResource.packageName); } json = json.endObject(); SharedPreferences.Editor editor = sharedPrefs.edit(); if (DBG) Log.d(TAG, "Adding to APPS_PENDING_INSTALL: " + json); addToStringSet(sharedPrefs, editor, APPS_PENDING_INSTALL, json.toString()); editor.commit(); } catch (org.json.JSONException e) { Log.d(TAG, "Exception when adding shortcut: " + e); } } } public static void removeFromInstallQueue(SharedPreferences sharedPrefs, ArrayList<String> packageNames) { synchronized (sLock) { Set<String> strings = sharedPrefs.getStringSet(APPS_PENDING_INSTALL, null); if (DBG) { Log.d(TAG, "APPS_PENDING_INSTALL: " + strings + ", removing packages: " + packageNames); } if (strings != null) { Set<String> newStrings = new HashSet<String>(strings); Iterator<String> newStringsIter = newStrings.iterator(); while (newStringsIter.hasNext()) { String json = newStringsIter.next(); try { JSONObject object = (JSONObject) new JSONTokener(json).nextValue(); Intent launchIntent = Intent.parseUri(object.getString(LAUNCH_INTENT_KEY), 0); String pn = launchIntent.getPackage(); if (pn == null) { pn = launchIntent.getComponent().getPackageName(); } if (packageNames.contains(pn)) { newStringsIter.remove(); } } catch (org.json.JSONException e) { Log.d(TAG, "Exception reading shortcut to remove: " + e); } catch (java.net.URISyntaxException e) { Log.d(TAG, "Exception reading shortcut to remove: " + e); } } sharedPrefs.edit().putStringSet(APPS_PENDING_INSTALL, new HashSet<String>(newStrings)).commit(); } } } private static ArrayList<PendingInstallShortcutInfo> getAndClearInstallQueue(SharedPreferences sharedPrefs) { synchronized (sLock) { Set<String> strings = sharedPrefs.getStringSet(APPS_PENDING_INSTALL, null); if (DBG) Log.d(TAG, "Getting and clearing APPS_PENDING_INSTALL: " + strings); if (strings == null) { return new ArrayList<PendingInstallShortcutInfo>(); } ArrayList<PendingInstallShortcutInfo> infos = new ArrayList<PendingInstallShortcutInfo>(); for (String json : strings) { try { JSONObject object = (JSONObject) new JSONTokener(json).nextValue(); Intent data = Intent.parseUri(object.getString(DATA_INTENT_KEY), 0); Intent launchIntent = Intent.parseUri(object.getString(LAUNCH_INTENT_KEY), 0); String name = object.getString(NAME_KEY); String iconBase64 = object.optString(ICON_KEY); String iconResourceName = object.optString(ICON_RESOURCE_NAME_KEY); String iconResourcePackageName = object.optString(ICON_RESOURCE_PACKAGE_NAME_KEY); if (iconBase64 != null && !iconBase64.isEmpty()) { byte[] iconArray = Base64.decode(iconBase64, Base64.DEFAULT); Bitmap b = BitmapFactory.decodeByteArray(iconArray, 0, iconArray.length); data.putExtra(Intent.EXTRA_SHORTCUT_ICON, b); } else if (iconResourceName != null && !iconResourceName.isEmpty()) { Intent.ShortcutIconResource iconResource = new Intent.ShortcutIconResource(); iconResource.resourceName = iconResourceName; iconResource.packageName = iconResourcePackageName; data.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, iconResource); } data.putExtra(Intent.EXTRA_SHORTCUT_INTENT, launchIntent); PendingInstallShortcutInfo info = new PendingInstallShortcutInfo(data, name, launchIntent); infos.add(info); } catch (org.json.JSONException e) { Log.d(TAG, "Exception reading shortcut to add: " + e); } catch (java.net.URISyntaxException e) { Log.d(TAG, "Exception reading shortcut to add: " + e); } } sharedPrefs.edit().putStringSet(APPS_PENDING_INSTALL, new HashSet<String>()).commit(); return infos; } } // Determines whether to defer installing shortcuts immediately until // processAllPendingInstalls() is called. private static boolean mUseInstallQueue = false; private static class PendingInstallShortcutInfo { Intent data; Intent launchIntent; String name; Bitmap icon; Intent.ShortcutIconResource iconResource; public PendingInstallShortcutInfo(Intent rawData, String shortcutName, Intent shortcutIntent) { data = rawData; name = shortcutName; launchIntent = shortcutIntent; } } @Override public void onReceive(Context context, Intent data) { if (!ACTION_INSTALL_SHORTCUT.equals(data.getAction())) { return; } if (DBG) Log.d(TAG, "Got INSTALL_SHORTCUT: " + data.toUri(0)); Intent intent = data.getParcelableExtra(Intent.EXTRA_SHORTCUT_INTENT); if (intent == null) { return; } // This name is only used for comparisons and notifications, so fall // back to activity name // if not supplied String name = data.getStringExtra(Intent.EXTRA_SHORTCUT_NAME); if (name == null) { try { PackageManager pm = context.getPackageManager(); ActivityInfo info = pm.getActivityInfo(intent.getComponent(), 0); name = info.loadLabel(pm).toString(); } catch (PackageManager.NameNotFoundException nnfe) { return; } } Bitmap icon = data.getParcelableExtra(Intent.EXTRA_SHORTCUT_ICON); Intent.ShortcutIconResource iconResource = data.getParcelableExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE); // Queue the item up for adding if launcher has not loaded properly yet LauncherAppState.setApplicationContext(context.getApplicationContext()); LauncherAppState app = LauncherAppState.getInstance(); boolean launcherNotLoaded = (app.getDynamicGrid() == null); PendingInstallShortcutInfo info = new PendingInstallShortcutInfo(data, name, intent); info.icon = icon; info.iconResource = iconResource; String spKey = LauncherAppState.getSharedPreferencesKey(); SharedPreferences sp = context.getSharedPreferences(spKey, Context.MODE_PRIVATE); addToInstallQueue(sp, info); if (!mUseInstallQueue && !launcherNotLoaded) { flushInstallQueue(context); } } static void enableInstallQueue() { mUseInstallQueue = true; } static void disableAndFlushInstallQueue(Context context) { mUseInstallQueue = false; flushInstallQueue(context); } static void flushInstallQueue(Context context) { String spKey = LauncherAppState.getSharedPreferencesKey(); SharedPreferences sp = context.getSharedPreferences(spKey, Context.MODE_PRIVATE); ArrayList<PendingInstallShortcutInfo> installQueue = getAndClearInstallQueue(sp); if (!installQueue.isEmpty()) { Iterator<PendingInstallShortcutInfo> iter = installQueue.iterator(); ArrayList<ItemInfo> addShortcuts = new ArrayList<ItemInfo>(); int result = INSTALL_SHORTCUT_SUCCESSFUL; String duplicateName = ""; while (iter.hasNext()) { final PendingInstallShortcutInfo pendingInfo = iter.next(); // final Intent data = pendingInfo.data; final Intent intent = pendingInfo.launchIntent; final String name = pendingInfo.name; final boolean exists = LauncherModel.shortcutExists(context, name, intent); // final boolean allowDuplicate = // data.getBooleanExtra(Launcher.EXTRA_SHORTCUT_DUPLICATE, // true); // TODO-XXX: Disable duplicates for now if (!exists /* && allowDuplicate */) { // Generate a shortcut info to add into the model ShortcutInfo info = getShortcutInfo(context, pendingInfo.data, pendingInfo.launchIntent); addShortcuts.add(info); } /* * else if (exists && !allowDuplicate) { result = * INSTALL_SHORTCUT_IS_DUPLICATE; duplicateName = name; } */ } // Notify the user once if we weren't able to place any duplicates if (result == INSTALL_SHORTCUT_IS_DUPLICATE) { Toast.makeText(context, context.getString(R.string.shortcut_duplicate, duplicateName), Toast.LENGTH_SHORT).show(); } // Add the new apps to the model and bind them if (!addShortcuts.isEmpty()) { LauncherAppState app = LauncherAppState.getInstance(); app.getModel().addAndBindAddedApps(context, addShortcuts, null); } } } private static ShortcutInfo getShortcutInfo(Context context, Intent data, Intent launchIntent) { if (launchIntent.getAction() == null) { launchIntent.setAction(Intent.ACTION_VIEW); } else if (launchIntent.getAction().equals(Intent.ACTION_MAIN) && launchIntent.getCategories() != null && launchIntent.getCategories().contains(Intent.CATEGORY_LAUNCHER)) { launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED); } LauncherAppState app = LauncherAppState.getInstance(); return app.getModel().infoFromShortcutIntent(context, data, null); } }