Question

I’m having some problems using RemoteViews. Simply want to make a widget that shows battery level. I’ve done all other stuffs already.

Here is my class:

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;
        }
    }
}

When i start the app no error and btw no update at R.id.level.

What’s wrong?

Note: api version 7.

Answer 1

Since your service is an inner class, I guess you have not declared it in your Android Manifest, which is needed.
And you shouldn’t use onStart, it is deprecated. Use onStartCommand. And you forgot to unregister your receiver…