Java tutorial
/* * Copyright (C) 2010 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.android.calendar.selectcalendars; import android.support.v4.app.FragmentManager; import android.content.Context; import android.content.res.Configuration; import android.content.res.Resources; import android.database.Cursor; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.provider.CalendarContract.Calendars; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.TouchDelegate; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.widget.BaseAdapter; import android.widget.CheckBox; import android.widget.ListAdapter; import android.widget.TextView; import com.android.calendar.CalendarColorPickerDialog; import com.congenialmobile.calendar.R; import com.android.calendar.Utils; import com.android.calendar.selectcalendars.CalendarColorCache.OnCalendarColorsLoadedListener; public class SelectCalendarsSimpleAdapter extends BaseAdapter implements ListAdapter, OnCalendarColorsLoadedListener { private static final String TAG = "SelectCalendarsAdapter"; private static final String COLOR_PICKER_DIALOG_TAG = "ColorPickerDialog"; private static int BOTTOM_ITEM_HEIGHT = 64; private static int NORMAL_ITEM_HEIGHT = 48; private static final int IS_SELECTED = 1 << 0; private static final int IS_TOP = 1 << 1; private static final int IS_BOTTOM = 1 << 2; private static final int IS_BELOW_SELECTED = 1 << 3; private CalendarColorPickerDialog mColorPickerDialog; private LayoutInflater mInflater; Resources mRes; private int mLayout; private int mOrientation; private CalendarRow[] mData; private Cursor mCursor; private int mRowCount = 0; private FragmentManager mFragmentManager; private boolean mIsTablet; private int mColorViewTouchAreaIncrease; private int mIdColumn; private int mNameColumn; private int mColorColumn; private int mVisibleColumn; private int mOwnerAccountColumn; private int mAccountNameColumn; private int mAccountTypeColumn; private static float mScale = 0; private int mColorCalendarVisible; private int mColorCalendarHidden; private int mColorCalendarSecondaryVisible; private int mColorCalendarSecondaryHidden; private CalendarColorCache mCache; private class CalendarRow { long id; String displayName; String ownerAccount; String accountName; String accountType; int color; boolean selected; } public SelectCalendarsSimpleAdapter(Context context, int layout, Cursor c, FragmentManager fm) { super(); mLayout = layout; mOrientation = context.getResources().getConfiguration().orientation; initData(c); mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); mRes = context.getResources(); mColorCalendarVisible = mRes.getColor(R.color.calendar_visible); mColorCalendarHidden = mRes.getColor(R.color.calendar_hidden); mColorCalendarSecondaryVisible = mRes.getColor(R.color.calendar_secondary_visible); mColorCalendarSecondaryHidden = mRes.getColor(R.color.calendar_secondary_hidden); if (mScale == 0) { mScale = mRes.getDisplayMetrics().density; BOTTOM_ITEM_HEIGHT *= mScale; NORMAL_ITEM_HEIGHT *= mScale; } mCache = new CalendarColorCache(context, this); mFragmentManager = fm; mColorPickerDialog = (CalendarColorPickerDialog) fm.findFragmentByTag(COLOR_PICKER_DIALOG_TAG); mIsTablet = Utils.getConfigBool(context, R.bool.tablet_config); mColorViewTouchAreaIncrease = context.getResources() .getDimensionPixelSize(R.dimen.color_view_touch_area_increase); } private static class TabletCalendarItemBackgrounds { static private int[] mBackgrounds = null; /** * Sets up the background drawables for the calendars list * * @param res The context's resources */ static int[] getBackgrounds() { // Not thread safe. Ok if called only from main thread if (mBackgrounds != null) { return mBackgrounds; } mBackgrounds = new int[16]; mBackgrounds[0] = R.drawable.calname_unselected; mBackgrounds[IS_SELECTED] = R.drawable.calname_select_underunselected; mBackgrounds[IS_SELECTED | IS_BOTTOM] = R.drawable.calname_bottom_select_underunselected; mBackgrounds[IS_SELECTED | IS_BOTTOM | IS_BELOW_SELECTED] = R.drawable.calname_bottom_select_underselect; mBackgrounds[IS_SELECTED | IS_TOP | IS_BOTTOM | IS_BELOW_SELECTED] = mBackgrounds[IS_SELECTED | IS_BOTTOM | IS_BELOW_SELECTED]; mBackgrounds[IS_SELECTED | IS_TOP | IS_BOTTOM] = mBackgrounds[IS_SELECTED | IS_BOTTOM | IS_BELOW_SELECTED]; mBackgrounds[IS_SELECTED | IS_BELOW_SELECTED] = R.drawable.calname_select_underselect; mBackgrounds[IS_SELECTED | IS_TOP | IS_BELOW_SELECTED] = mBackgrounds[IS_SELECTED | IS_BELOW_SELECTED]; mBackgrounds[IS_SELECTED | IS_TOP] = mBackgrounds[IS_SELECTED | IS_BELOW_SELECTED]; mBackgrounds[IS_BOTTOM] = R.drawable.calname_bottom_unselected; mBackgrounds[IS_BOTTOM | IS_BELOW_SELECTED] = R.drawable.calname_bottom_unselected_underselect; mBackgrounds[IS_TOP | IS_BOTTOM | IS_BELOW_SELECTED] = mBackgrounds[IS_BOTTOM | IS_BELOW_SELECTED]; mBackgrounds[IS_TOP | IS_BOTTOM] = mBackgrounds[IS_BOTTOM | IS_BELOW_SELECTED]; mBackgrounds[IS_BELOW_SELECTED] = R.drawable.calname_unselected_underselect; mBackgrounds[IS_TOP | IS_BELOW_SELECTED] = mBackgrounds[IS_BELOW_SELECTED]; mBackgrounds[IS_TOP] = mBackgrounds[IS_BELOW_SELECTED]; return mBackgrounds; } } private void initData(Cursor c) { if (mCursor != null && c != mCursor) { mCursor.close(); } if (c == null) { mCursor = c; mRowCount = 0; mData = null; return; } // TODO create a broadcast listener for ACTION_PROVIDER_CHANGED to update the cursor mCursor = c; mIdColumn = c.getColumnIndexOrThrow(Calendars._ID); mNameColumn = c.getColumnIndexOrThrow(Calendars.CALENDAR_DISPLAY_NAME); mColorColumn = c.getColumnIndexOrThrow(Calendars.CALENDAR_COLOR); mVisibleColumn = c.getColumnIndexOrThrow(Calendars.VISIBLE); mOwnerAccountColumn = c.getColumnIndexOrThrow(Calendars.OWNER_ACCOUNT); mAccountNameColumn = c.getColumnIndexOrThrow(Calendars.ACCOUNT_NAME); mAccountTypeColumn = c.getColumnIndexOrThrow(Calendars.ACCOUNT_TYPE); mRowCount = c.getCount(); mData = new CalendarRow[(c.getCount())]; c.moveToPosition(-1); int p = 0; while (c.moveToNext()) { mData[p] = new CalendarRow(); mData[p].id = c.getLong(mIdColumn); mData[p].displayName = c.getString(mNameColumn); mData[p].color = c.getInt(mColorColumn); mData[p].selected = c.getInt(mVisibleColumn) != 0; mData[p].ownerAccount = c.getString(mOwnerAccountColumn); mData[p].accountName = c.getString(mAccountNameColumn); mData[p].accountType = c.getString(mAccountTypeColumn); p++; } } public void changeCursor(Cursor c) { initData(c); notifyDataSetChanged(); } @Override public View getView(final int position, View convertView, ViewGroup parent) { if (position >= mRowCount) { return null; } String name = mData[position].displayName; boolean selected = mData[position].selected; int color = Utils.getDisplayColorFromColor(mData[position].color); View view; if (convertView == null) { view = mInflater.inflate(mLayout, parent, false); final View delegate = view.findViewById(R.id.color); final View delegateParent = (View) delegate.getParent(); delegateParent.post(new Runnable() { @Override public void run() { final Rect r = new Rect(); delegate.getHitRect(r); r.top -= mColorViewTouchAreaIncrease; r.bottom += mColorViewTouchAreaIncrease; r.left -= mColorViewTouchAreaIncrease; r.right += mColorViewTouchAreaIncrease; delegateParent.setTouchDelegate(new TouchDelegate(r, delegate)); } }); } else { view = convertView; } TextView calendarName = (TextView) view.findViewById(R.id.calendar); calendarName.setText(name); View colorView = view.findViewById(R.id.color); colorView.setBackgroundColor(color); colorView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // Purely for sanity check--view should be disabled if account has no more colors if (!hasMoreColors(position)) { return; } if (mColorPickerDialog == null) { mColorPickerDialog = CalendarColorPickerDialog.newInstance(mData[position].id, mIsTablet); } else { mColorPickerDialog.setCalendarId(mData[position].id); } mFragmentManager.executePendingTransactions(); if (!mColorPickerDialog.isAdded()) { mColorPickerDialog.show(mFragmentManager, COLOR_PICKER_DIALOG_TAG); } } }); int textColor; if (selected) { textColor = mColorCalendarVisible; } else { textColor = mColorCalendarHidden; } calendarName.setTextColor(textColor); CheckBox syncCheckBox = (CheckBox) view.findViewById(R.id.sync); if (syncCheckBox != null) { // Full screen layout syncCheckBox.setChecked(selected); colorView.setEnabled(hasMoreColors(position)); LayoutParams layoutParam = calendarName.getLayoutParams(); TextView secondaryText = (TextView) view.findViewById(R.id.status); if (!TextUtils.isEmpty(mData[position].ownerAccount) && !mData[position].ownerAccount.equals(name) && !mData[position].ownerAccount.endsWith("calendar.google.com")) { int secondaryColor; if (selected) { secondaryColor = mColorCalendarSecondaryVisible; } else { secondaryColor = mColorCalendarSecondaryHidden; } secondaryText.setText(mData[position].ownerAccount); secondaryText.setTextColor(secondaryColor); secondaryText.setVisibility(View.VISIBLE); layoutParam.height = LayoutParams.WRAP_CONTENT; } else { secondaryText.setVisibility(View.GONE); layoutParam.height = LayoutParams.MATCH_PARENT; } calendarName.setLayoutParams(layoutParam); } else { // Tablet layout view.findViewById(R.id.color).setEnabled(selected && hasMoreColors(position)); view.setBackgroundDrawable(getBackground(position, selected)); ViewGroup.LayoutParams newParams = view.getLayoutParams(); if (position == mData.length - 1) { newParams.height = BOTTOM_ITEM_HEIGHT; } else { newParams.height = NORMAL_ITEM_HEIGHT; } view.setLayoutParams(newParams); CheckBox visibleCheckBox = (CheckBox) view.findViewById(R.id.visible_check_box); if (visibleCheckBox != null) { visibleCheckBox.setChecked(selected); } } view.invalidate(); return view; } private boolean hasMoreColors(int position) { return mCache.hasColors(mData[position].accountName, mData[position].accountType); } /** * @param position position of the calendar item * @param selected whether it is selected or not * @return the drawable to use for this view */ protected Drawable getBackground(int position, boolean selected) { int bg; bg = selected ? IS_SELECTED : 0; bg |= (position == 0 && mOrientation == Configuration.ORIENTATION_LANDSCAPE) ? IS_TOP : 0; bg |= position == mData.length - 1 ? IS_BOTTOM : 0; bg |= (position > 0 && mData[position - 1].selected) ? IS_BELOW_SELECTED : 0; return mRes.getDrawable(TabletCalendarItemBackgrounds.getBackgrounds()[bg]); } @Override public int getCount() { return mRowCount; } @Override public Object getItem(int position) { if (position >= mRowCount) { return null; } CalendarRow item = mData[position]; return item; } @Override public long getItemId(int position) { if (position >= mRowCount) { return 0; } return mData[position].id; } public void setVisible(int position, int visible) { mData[position].selected = visible != 0; notifyDataSetChanged(); } public int getVisible(int position) { return mData[position].selected ? 1 : 0; } @Override public boolean hasStableIds() { return true; } @Override public void onCalendarColorsLoaded() { notifyDataSetChanged(); } }