有关设置的延迟通知已更改

时间:2013-09-27 11:30:37

标签: android stream handler volumes

我有设置流量和服务的方法,其中包含Hadler以检查此更改

设置流的方法:

private setStreams(Context context)
{
   AudioManager am = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
   am.setStreamVolume(AudioManager.STREAM_RING, ringerVol, 0);
   am.setStreamVolume(AudioManager.STREAM_NOTIFICATION, notifVol, 0);
   am.setStreamVolume(AudioManager.STREAM_MUSIC, mediaVol, 0);
   am.setStreamVolume(AudioManager.STREAM_ALARM, alarmVol, 0);
   am.setStreamVolume(AudioManager.STREAM_SYSTEM, systemVol, 0);
   am.setStreamVolume(AudioManager.STREAM_VOICE_CALL, incallVol, 0);
   am.setStreamVolume(6, btVol, 0);  

  //some other code

}

Serivce:

public class SystemSettingsChangeObserverService extends Service {

    private ContentObserver observer;
    private static Context context;




    @Override
    public void onCreate(){
        super.onCreate();
        context = this;   
        observer = new ContentObserver (new Handler()) {

            @Override
            public boolean deliverSelfNotifications() {
                 return super.deliverSelfNotifications(); 
            }


            @Override
            public void onChange(boolean selfChange) {
                super.onChange(selfChange);
                //here I check new values of streams
            }
    }

  ...

问题是,onChange在setStreams方法中的“其他代码”之后调用,而不是在每个流的setStreamVolume之后调用。我需要这个,因为我需要知道我的应用程序内部或其他方式是否更改了卷。谢谢。

1 个答案:

答案 0 :(得分:0)

通过在SharedPreferences中放置布尔键“fromApp”并在SystemSettingsChangeObserverService中检查它来解决,然后将键设置为false