1/* 2 * Copyright (C) 2009 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 17package com.android.launcher3; 18 19import android.appwidget.AppWidgetHost; 20import android.appwidget.AppWidgetHostView; 21import android.appwidget.AppWidgetProviderInfo; 22import android.content.Context; 23import android.util.SparseArray; 24import android.view.LayoutInflater; 25 26import java.util.ArrayList; 27 28 29/** 30 * Specific {@link AppWidgetHost} that creates our {@link LauncherAppWidgetHostView} 31 * which correctly captures all long-press events. This ensures that users can 32 * always pick up and move widgets. 33 */ 34public class LauncherAppWidgetHost extends AppWidgetHost { 35 36 private final ArrayList<Runnable> mProviderChangeListeners = new ArrayList<Runnable>(); 37 private final SparseArray<LauncherAppWidgetHostView> mViews = new SparseArray<>(); 38 39 private Launcher mLauncher; 40 41 public LauncherAppWidgetHost(Launcher launcher, int hostId) { 42 super(launcher, hostId); 43 mLauncher = launcher; 44 } 45 46 @Override 47 protected LauncherAppWidgetHostView onCreateView(Context context, int appWidgetId, 48 AppWidgetProviderInfo appWidget) { 49 LauncherAppWidgetHostView view = new LauncherAppWidgetHostView(context); 50 mViews.put(appWidgetId, view); 51 return view; 52 } 53 54 @Override 55 public void startListening() { 56 try { 57 super.startListening(); 58 } catch (Exception e) { 59 if (!Utilities.isBinderSizeError(e)) { 60 throw new RuntimeException(e); 61 } 62 // We're willing to let this slide. The exception is being caused by the list of 63 // RemoteViews which is being passed back. The startListening relationship will 64 // have been established by this point, and we will end up populating the 65 // widgets upon bind anyway. See issue 14255011 for more context. 66 } 67 } 68 69 public void addProviderChangeListener(Runnable callback) { 70 mProviderChangeListeners.add(callback); 71 } 72 73 public void removeProviderChangeListener(Runnable callback) { 74 mProviderChangeListeners.remove(callback); 75 } 76 77 protected void onProvidersChanged() { 78 if (!mProviderChangeListeners.isEmpty()) { 79 for (Runnable callback : new ArrayList<>(mProviderChangeListeners)) { 80 callback.run(); 81 } 82 } 83 84 if (Utilities.ATLEAST_MARSHMALLOW) { 85 mLauncher.notifyWidgetProvidersChanged(); 86 } 87 } 88 89 public AppWidgetHostView createView(Context context, int appWidgetId, 90 LauncherAppWidgetProviderInfo appWidget) { 91 if (appWidget.isCustomWidget) { 92 LauncherAppWidgetHostView lahv = new LauncherAppWidgetHostView(context); 93 LayoutInflater inflater = (LayoutInflater) 94 context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 95 inflater.inflate(appWidget.initialLayout, lahv); 96 lahv.setAppWidget(0, appWidget); 97 lahv.updateLastInflationOrientation(); 98 return lahv; 99 } else { 100 try { 101 return super.createView(context, appWidgetId, appWidget); 102 } catch (Exception e) { 103 if (!Utilities.isBinderSizeError(e)) { 104 throw new RuntimeException(e); 105 } 106 107 // If the exception was thrown while fetching the remote views, let the view stay. 108 // This will ensure that if the widget posts a valid update later, the view 109 // will update. 110 LauncherAppWidgetHostView view = mViews.get(appWidgetId); 111 if (view == null) { 112 view = onCreateView(mLauncher, appWidgetId, appWidget); 113 } 114 view.setAppWidget(appWidgetId, appWidget); 115 view.switchToErrorView(); 116 return view; 117 } 118 } 119 } 120 121 /** 122 * Called when the AppWidget provider for a AppWidget has been upgraded to a new apk. 123 */ 124 @Override 125 protected void onProviderChanged(int appWidgetId, AppWidgetProviderInfo appWidget) { 126 LauncherAppWidgetProviderInfo info = LauncherAppWidgetProviderInfo.fromProviderInfo( 127 mLauncher, appWidget); 128 super.onProviderChanged(appWidgetId, info); 129 // The super method updates the dimensions of the providerInfo. Update the 130 // launcher spans accordingly. 131 info.initSpans(mLauncher); 132 } 133 134 @Override 135 public void deleteAppWidgetId(int appWidgetId) { 136 super.deleteAppWidgetId(appWidgetId); 137 mViews.remove(appWidgetId); 138 } 139 140 @Override 141 protected void clearViews() { 142 super.clearViews(); 143 mViews.clear(); 144 } 145} 146