1 /* 2 * Copyright (C) 2014 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.android.systemui.recents; 18 19 import android.appwidget.AppWidgetHost; 20 import android.appwidget.AppWidgetHostView; 21 import android.appwidget.AppWidgetProviderInfo; 22 import android.content.Context; 23 24 /** Our special app widget host for the Search widget */ 25 public class RecentsAppWidgetHost extends AppWidgetHost { 26 27 /* Callbacks to notify when an app package changes */ 28 interface RecentsAppWidgetHostCallbacks { refreshSearchWidgetView()29 void refreshSearchWidgetView(); 30 } 31 32 RecentsAppWidgetHostCallbacks mCb; 33 boolean mIsListening; 34 RecentsAppWidgetHost(Context context, int hostId)35 public RecentsAppWidgetHost(Context context, int hostId) { 36 super(context, hostId); 37 } 38 startListening(RecentsAppWidgetHostCallbacks cb)39 public void startListening(RecentsAppWidgetHostCallbacks cb) { 40 mCb = cb; 41 if (!mIsListening) { 42 mIsListening = true; 43 super.startListening(); 44 } 45 } 46 47 @Override stopListening()48 public void stopListening() { 49 if (mIsListening) { 50 super.stopListening(); 51 } 52 // Ensure that we release any references to the callbacks 53 mCb = null; 54 mIsListening = false; 55 } 56 57 @Override onCreateView(Context context, int appWidgetId, AppWidgetProviderInfo appWidget)58 protected AppWidgetHostView onCreateView(Context context, int appWidgetId, 59 AppWidgetProviderInfo appWidget) { 60 return new RecentsAppWidgetHostView(context); 61 } 62 63 /** 64 * Note: this is only called for packages that have updated, not removed. 65 */ 66 @Override onProviderChanged(int appWidgetId, AppWidgetProviderInfo appWidgetInfo)67 protected void onProviderChanged(int appWidgetId, AppWidgetProviderInfo appWidgetInfo) { 68 super.onProviderChanged(appWidgetId, appWidgetInfo); 69 if (mIsListening && mCb != null) { 70 mCb.refreshSearchWidgetView(); 71 } 72 } 73 } 74