好的,我正在开发一个 AppWidget,它可以检查电池电量并在 TextView 上显示。我的代码如下:
public class BattWidget extends AppWidgetProvider {
private RemoteViews views = new RemoteViews("com.nickavv.cleanwidgets", R.layout.battlayout);
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int appWidgetIds[]) {
final int N = appWidgetIds.length;
context.getApplicationContext().registerReceiver(this,new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
for (int i = 0; i < N; i++) {
int appWidgetId = appWidgetIds[i];
appWidgetManager.updateAppWidget(appWidgetId, views);
}
}
@Override
public void onReceive(Context context, Intent intent) {
super.onReceive(context, intent);
Log.d("onReceive", "Received intent " + intent);
if (intent.getAction().equals(Intent.ACTION_BATTERY_CHANGED)) {
Integer level = intent.getIntExtra("level", -1);
views.setTextViewText(R.id.batteryText, level+"%");
AppWidgetManager myAWM = AppWidgetManager.getInstance(context);
ComponentName cn = new ComponentName(context, AirWidget.class);
onUpdate(context, myAWM, myAWM.getAppWidgetIds(cn));
}
}
}
我开始感到担忧,因为一旦我将小部件放到我的主屏幕上,它就会开始每秒触发约100个这样的日志调用,称它正在接收ACTION_BATTERY_CHANGED。难道这只应该在每百分比降低时广播吗?这实际上导致了整个启动器卡顿,我不得不卸载它。这肯定不对。