| /* |
| * Copyright (C) 2011 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.example.android.widgetdata; |
| |
| import android.app.PendingIntent; |
| import android.appwidget.AppWidgetManager; |
| import android.appwidget.AppWidgetProvider; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.ComponentName; |
| import android.content.ContentValues; |
| import android.content.ContentResolver; |
| import android.content.ContentUris; |
| import android.database.Cursor; |
| import android.database.ContentObserver; |
| import android.net.Uri; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.HandlerThread; |
| import android.widget.RemoteViews; |
| import android.widget.Toast; |
| |
| import java.util.Random; |
| |
| /** |
| * Our data observer just notifies an update for all weather widgets when it detects a change. |
| */ |
| class WeatherDataProviderObserver extends ContentObserver { |
| private AppWidgetManager mAppWidgetManager; |
| private ComponentName mComponentName; |
| |
| WeatherDataProviderObserver(AppWidgetManager mgr, ComponentName cn, Handler h) { |
| super(h); |
| mAppWidgetManager = mgr; |
| mComponentName = cn; |
| } |
| |
| @Override |
| public void onChange(boolean selfChange) { |
| // The data has changed, so notify the widget that the collection view needs to be updated. |
| // In response, the factory's onDataSetChanged() will be called which will requery the |
| // cursor for the new data. |
| mAppWidgetManager.notifyAppWidgetViewDataChanged( |
| mAppWidgetManager.getAppWidgetIds(mComponentName), R.id.weather_list); |
| } |
| } |
| |
| /** |
| * The weather widget's AppWidgetProvider. |
| */ |
| public class WeatherWidgetProvider extends AppWidgetProvider { |
| public static String CLICK_ACTION = "com.example.android.widgetdata.CLICK"; |
| public static String REFRESH_ACTION = "com.example.android.widgetdata.REFRESH"; |
| public static String EXTRA_DAY_ID = "com.example.android.widgetdata.day"; |
| |
| private static HandlerThread sWorkerThread; |
| private static Handler sWorkerQueue; |
| private static WeatherDataProviderObserver sDataObserver; |
| private static final int sMaxDegrees = 96; |
| |
| private boolean mIsLargeLayout = true; |
| private int mHeaderWeatherState = 0; |
| |
| public WeatherWidgetProvider() { |
| // Start the worker thread |
| sWorkerThread = new HandlerThread("WeatherWidgetProvider-worker"); |
| sWorkerThread.start(); |
| sWorkerQueue = new Handler(sWorkerThread.getLooper()); |
| } |
| |
| // XXX: clear the worker queue if we are destroyed? |
| |
| @Override |
| public void onEnabled(Context context) { |
| // Register for external updates to the data to trigger an update of the widget. When using |
| // content providers, the data is often updated via a background service, or in response to |
| // user interaction in the main app. To ensure that the widget always reflects the current |
| // state of the data, we must listen for changes and update ourselves accordingly. |
| final ContentResolver r = context.getContentResolver(); |
| if (sDataObserver == null) { |
| final AppWidgetManager mgr = AppWidgetManager.getInstance(context); |
| final ComponentName cn = new ComponentName(context, WeatherWidgetProvider.class); |
| sDataObserver = new WeatherDataProviderObserver(mgr, cn, sWorkerQueue); |
| r.registerContentObserver(WeatherDataProvider.CONTENT_URI, true, sDataObserver); |
| } |
| } |
| |
| @Override |
| public void onReceive(Context ctx, Intent intent) { |
| final String action = intent.getAction(); |
| if (action.equals(REFRESH_ACTION)) { |
| // BroadcastReceivers have a limited amount of time to do work, so for this sample, we |
| // are triggering an update of the data on another thread. In practice, this update |
| // can be triggered from a background service, or perhaps as a result of user actions |
| // inside the main application. |
| final Context context = ctx; |
| sWorkerQueue.removeMessages(0); |
| sWorkerQueue.post(new Runnable() { |
| @Override |
| public void run() { |
| final ContentResolver r = context.getContentResolver(); |
| final Cursor c = r.query(WeatherDataProvider.CONTENT_URI, null, null, null, |
| null); |
| final int count = c.getCount(); |
| |
| // We disable the data changed observer temporarily since each of the updates |
| // will trigger an onChange() in our data observer. |
| r.unregisterContentObserver(sDataObserver); |
| for (int i = 0; i < count; ++i) { |
| final Uri uri = ContentUris.withAppendedId(WeatherDataProvider.CONTENT_URI, i); |
| final ContentValues values = new ContentValues(); |
| values.put(WeatherDataProvider.Columns.TEMPERATURE, |
| new Random().nextInt(sMaxDegrees)); |
| r.update(uri, values, null, null); |
| } |
| r.registerContentObserver(WeatherDataProvider.CONTENT_URI, true, sDataObserver); |
| |
| final AppWidgetManager mgr = AppWidgetManager.getInstance(context); |
| final ComponentName cn = new ComponentName(context, WeatherWidgetProvider.class); |
| mgr.notifyAppWidgetViewDataChanged(mgr.getAppWidgetIds(cn), R.id.weather_list); |
| } |
| }); |
| |
| final int appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, |
| AppWidgetManager.INVALID_APPWIDGET_ID); |
| } else if (action.equals(CLICK_ACTION)) { |
| // Show a toast |
| final int appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, |
| AppWidgetManager.INVALID_APPWIDGET_ID); |
| final String day = intent.getStringExtra(EXTRA_DAY_ID); |
| final String formatStr = ctx.getResources().getString(R.string.toast_format_string); |
| Toast.makeText(ctx, String.format(formatStr, day), Toast.LENGTH_SHORT).show(); |
| } |
| |
| super.onReceive(ctx, intent); |
| } |
| |
| private RemoteViews buildLayout(Context context, int appWidgetId, boolean largeLayout) { |
| RemoteViews rv; |
| if (largeLayout) { |
| // Specify the service to provide data for the collection widget. Note that we need to |
| // embed the appWidgetId via the data otherwise it will be ignored. |
| final Intent intent = new Intent(context, WeatherWidgetService.class); |
| intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId); |
| intent.setData(Uri.parse(intent.toUri(Intent.URI_INTENT_SCHEME))); |
| rv = new RemoteViews(context.getPackageName(), R.layout.widget_layout); |
| rv.setRemoteAdapter(appWidgetId, R.id.weather_list, intent); |
| |
| // Set the empty view to be displayed if the collection is empty. It must be a sibling |
| // view of the collection view. |
| rv.setEmptyView(R.id.weather_list, R.id.empty_view); |
| |
| // Bind a click listener template for the contents of the weather list. Note that we |
| // need to update the intent's data if we set an extra, since the extras will be |
| // ignored otherwise. |
| final Intent onClickIntent = new Intent(context, WeatherWidgetProvider.class); |
| onClickIntent.setAction(WeatherWidgetProvider.CLICK_ACTION); |
| onClickIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId); |
| onClickIntent.setData(Uri.parse(onClickIntent.toUri(Intent.URI_INTENT_SCHEME))); |
| final PendingIntent onClickPendingIntent = PendingIntent.getBroadcast(context, 0, |
| onClickIntent, PendingIntent.FLAG_UPDATE_CURRENT); |
| rv.setPendingIntentTemplate(R.id.weather_list, onClickPendingIntent); |
| |
| // Bind the click intent for the refresh button on the widget |
| final Intent refreshIntent = new Intent(context, WeatherWidgetProvider.class); |
| refreshIntent.setAction(WeatherWidgetProvider.REFRESH_ACTION); |
| final PendingIntent refreshPendingIntent = PendingIntent.getBroadcast(context, 0, |
| refreshIntent, PendingIntent.FLAG_UPDATE_CURRENT); |
| rv.setOnClickPendingIntent(R.id.refresh, refreshPendingIntent); |
| |
| // Restore the minimal header |
| rv.setTextViewText(R.id.city_name, context.getString(R.string.city_name)); |
| } else { |
| rv = new RemoteViews(context.getPackageName(), R.layout.widget_layout_small); |
| |
| // Update the header to reflect the weather for "today" |
| Cursor c = context.getContentResolver().query(WeatherDataProvider.CONTENT_URI, null, |
| null, null, null); |
| if (c.moveToPosition(0)) { |
| int tempColIndex = c.getColumnIndex(WeatherDataProvider.Columns.TEMPERATURE); |
| int temp = c.getInt(tempColIndex); |
| String formatStr = context.getResources().getString(R.string.header_format_string); |
| String header = String.format(formatStr, temp, |
| context.getString(R.string.city_name)); |
| rv.setTextViewText(R.id.city_name, header); |
| } |
| c.close(); |
| } |
| return rv; |
| } |
| |
| @Override |
| public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) { |
| // Update each of the widgets with the remote adapter |
| for (int i = 0; i < appWidgetIds.length; ++i) { |
| RemoteViews layout = buildLayout(context, appWidgetIds[i], mIsLargeLayout); |
| appWidgetManager.updateAppWidget(appWidgetIds[i], layout); |
| } |
| super.onUpdate(context, appWidgetManager, appWidgetIds); |
| } |
| |
| @Override |
| public void onAppWidgetOptionsChanged(Context context, AppWidgetManager appWidgetManager, |
| int appWidgetId, Bundle newOptions) { |
| |
| int minWidth = newOptions.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH); |
| int maxWidth = newOptions.getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH); |
| int minHeight = newOptions.getInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT); |
| int maxHeight = newOptions.getInt(AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT); |
| |
| RemoteViews layout; |
| if (minHeight < 100) { |
| mIsLargeLayout = false; |
| } else { |
| mIsLargeLayout = true; |
| } |
| layout = buildLayout(context, appWidgetId, mIsLargeLayout); |
| appWidgetManager.updateAppWidget(appWidgetId, layout); |
| } |
| } |