content: /*
   * Copyright (C) 2009 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.lb.launcher;
  
  import android.appwidget.AppWidgetHost;
  import android.appwidget.AppWidgetHostView;
  import android.appwidget.AppWidgetProviderInfo;
  import android.content.Context;
  import android.os.TransactionTooLargeException;
  
  import java.util.ArrayList;
  
  /**
   * Specific {@link AppWidgetHost} that creates our {@link LauncherAppWidgetHostView}
   * which correctly captures all long-press events. This ensures that users can
   * always pick up and move widgets.
   */
  public class LauncherAppWidgetHost extends AppWidgetHost {
  
      private final ArrayList<Runnable> mProviderChangeListeners = new ArrayList<Runnable>();
  
      Launcher mLauncher;
  
      public LauncherAppWidgetHost(Launcher launcher, int hostId) {
          super(launcher, hostId);
          mLauncher = launcher;
      }
  
      @Override
      protected AppWidgetHostView onCreateView(Context context, int appWidgetId,
              AppWidgetProviderInfo appWidget) {
          return new LauncherAppWidgetHostView(context);
      }
  
      @Override
      public void startListening() {
          try {
              super.startListening();
          } catch (Exception e) {
              if (e.getCause() instanceof TransactionTooLargeException) {
                  // We're willing to let this slide. The exception is being caused by the list of
                  // RemoteViews which is being passed back. The startListening relationship will
                  // have been established by this point, and we will end up populating the
                  // widgets upon bind anyway. See issue 14255011 for more context.
              } else {
                  throw new RuntimeException(e);
              }
          }
      }
  
      @Override
      public void stopListening() {
          super.stopListening();
          clearViews();
      }
  
      public void addProviderChangeListener(Runnable callback) {
          mProviderChangeListeners.add(callback);
      }
  
      public void removeProviderChangeListener(Runnable callback) {
          mProviderChangeListeners.remove(callback);
      }
  
      protected void onProvidersChanged() {
          // Once we get the message that widget packages are updated, we need to rebind items
          // in AppsCustomize accordingly.
          mLauncher.bindPackagesUpdated(LauncherModel.getSortedWidgetsAndShortcuts(mLauncher));
  
          for (Runnable callback : mProviderChangeListeners) {
              callback.run();
          }
      }
  }
  