Android:BatteryLevel小部件不更新

Question

我在使用RemoteView时遇到了一些问题.只想制作一个显示电池电量的小部件.我已经完成了所有其他的事情.

这是我的班级:

public class BatteryLevel extends AppWidgetProvider{

    public void onUpdate( Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds ){
        context.startService(new Intent(context, BatteryMonitorReceiver.class));
    }

    public static class BatteryMonitorReceiver extends Service{
        private int currentBatteryLevel = 0;

        private BroadcastReceiver batteryReceiver = new BroadcastReceiver(){
            @Override
            public void onReceive( Context context, Intent intent ){
                currentBatteryLevel = intent.getIntExtra( "level", 0 );
            }
        };

        @Override
        public void onStart (Intent intent, int startId) {          
            registerReceiver( this.batteryReceiver, new IntentFilter( Intent.ACTION_BATTERY_CHANGED ) );
            RemoteViews updateViews = new RemoteViews( getPackageName(), R.layout.main );
            updateViews.setTextViewText( R.id.level, String.valueOf(currentBatteryLevel));

            ComponentName thisWidget = new ComponentName( this, BatteryLevel.class );
            AppWidgetManager manager = AppWidgetManager.getInstance( this );
            manager.updateAppWidget(thisWidget, updateViews);
        }

        @Override
        public IBinder onBind( Intent intent ){
            return null;
        }
    }
}

当我启动应用程序时没有错误,并且在R.id.level没有更新.

怎么了？

注意:api版本7.

Answer 1

由于你的服务是一个内部类，我猜你还没有在你的Android清单中声明它，这是需要的。而且您不应该使用onStart，它已被弃用。使用onStartCommand。而且您忘记取消注册您的接收器......