android清除数据后widget无法更新问题修改

清除数据时会发送ACTION_PACKAGE_DATA_CLEARED广播，在widgetProvider里面监听该广播并进行处理就可以了

 

 

public static class PackageDataClearedReceiver extends BroadcastReceiver {
       private static final String ACTION_PACKAGE_DATA_CLEARED = "com.mediatek.intent.action.SETTINGS_PACKAGE_DATA_CLEARED";

       public void onReceive(Context context, Intent intent) {
           if (!ACTION_PACKAGE_DATA_CLEARED.equals(intent.getAction())) {
               return;
           }
           String pkgName = intent.getStringExtra("packageName");
           MusicLogUtils.v(TAG, "PackageDataClearedReceiver recevied pkgName = " + pkgName);
           if (pkgName != null && pkgName.equals(context.getPackageName())) {
               MediaAppWidgetProvider mediaAppWidgetProvider = MediaAppWidgetProvider
                       .getInstance();
               if (mediaAppWidgetProvider == null) {
                   MusicLogUtils.v(TAG, "mediaAppWidgetProvider is null ");
                   return;
               }
               mediaAppWidgetProvider.defaultAppWidget(context, null);
           }
       }

   }

 

defaultAppWidget()函数会重新加载widget信息和布局文件，这样就可以恢复默认值了。
最后别忘了在AndroidManefest.xml里面加上：

 

<receiver android:name="com.android.music.MediaAppWidgetProvider$PackageDataClearedReceiver" >
    <intent-filter>
        <action android:name="com.mediatek.intent.action.SETTINGS_PACKAGE_DATA_CLEARED" />
        <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
</receiver>

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