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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.example.android.stackwidget;
     18 
     19 import android.app.PendingIntent;
     20 import android.appwidget.AppWidgetManager;
     21 import android.appwidget.AppWidgetProvider;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.net.Uri;
     25 import android.widget.RemoteViews;
     26 import android.widget.Toast;
     27 
     28 public class StackWidgetProvider extends AppWidgetProvider {
     29     public static final String TOAST_ACTION = "com.example.android.stackwidget.TOAST_ACTION";
     30     public static final String EXTRA_ITEM = "com.example.android.stackwidget.EXTRA_ITEM";
     31 
     32     @Override
     33     public void onDeleted(Context context, int[] appWidgetIds) {
     34         super.onDeleted(context, appWidgetIds);
     35     }
     36 
     37     @Override
     38     public void onDisabled(Context context) {
     39         super.onDisabled(context);
     40     }
     41 
     42     @Override
     43     public void onEnabled(Context context) {
     44         super.onEnabled(context);
     45     }
     46 
     47     @Override
     48     public void onReceive(Context context, Intent intent) {
     49         AppWidgetManager mgr = AppWidgetManager.getInstance(context);
     50         if (intent.getAction().equals(TOAST_ACTION)) {
     51             int appWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
     52                     AppWidgetManager.INVALID_APPWIDGET_ID);
     53             int viewIndex = intent.getIntExtra(EXTRA_ITEM, 0);
     54             Toast.makeText(context, "Touched view " + viewIndex, Toast.LENGTH_SHORT).show();
     55         }
     56         super.onReceive(context, intent);
     57     }
     58 
     59     @Override
     60     public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
     61         // update each of the widgets with the remote adapter
     62         for (int i = 0; i < appWidgetIds.length; ++i) {
     63 
     64             // Here we setup the intent which points to the StackViewService which will
     65             // provide the views for this collection.
     66             Intent intent = new Intent(context, StackWidgetService.class);
     67             intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetIds[i]);
     68             // When intents are compared, the extras are ignored, so we need to embed the extras
     69             // into the data so that the extras will not be ignored.
     70             intent.setData(Uri.parse(intent.toUri(Intent.URI_INTENT_SCHEME)));
     71             RemoteViews rv = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
     72             rv.setRemoteAdapter(appWidgetIds[i], R.id.stack_view, intent);
     73 
     74             // The empty view is displayed when the collection has no items. It should be a sibling
     75             // of the collection view.
     76             rv.setEmptyView(R.id.stack_view, R.id.empty_view);
     77 
     78             // Here we setup the a pending intent template. Individuals items of a collection
     79             // cannot setup their own pending intents, instead, the collection as a whole can
     80             // setup a pending intent template, and the individual items can set a fillInIntent
     81             // to create unique before on an item to item basis.
     82             Intent toastIntent = new Intent(context, StackWidgetProvider.class);
     83             toastIntent.setAction(StackWidgetProvider.TOAST_ACTION);
     84             toastIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetIds[i]);
     85             intent.setData(Uri.parse(intent.toUri(Intent.URI_INTENT_SCHEME)));
     86             PendingIntent toastPendingIntent = PendingIntent.getBroadcast(context, 0, toastIntent,
     87                     PendingIntent.FLAG_UPDATE_CURRENT);
     88             rv.setPendingIntentTemplate(R.id.stack_view, toastPendingIntent);
     89 
     90             appWidgetManager.updateAppWidget(appWidgetIds[i], rv);
     91         }
     92         super.onUpdate(context, appWidgetManager, appWidgetIds);
     93     }
     94 }