android清除資料後widget無法更新問題修改

標籤：android   blog   io   ar   java   檔案   資料   on   2014   

清除資料時會發送ACTION_PACKAGE_DATA_CLEARED廣播，在widgetProvider裡面監聽該廣播並進行處理就可以了

 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()函數會重新載入widget資訊和布局檔案，這樣就可以恢複預設值了。
最後別忘了在AndroidManefest.xml裡面加上：

        <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>

android清除資料後widget無法更新問題修改