android清除数据后widget无法更新问题修改

来源：互联网发布：第十届网络作家榜编辑：程序博客网时间：2024/06/06 02:08

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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