Question

我正在开发一款带有服务的音乐播放器。目前专注于   通知和按钮......

现在我在通知栏上有按钮播放，下一个，上一个..我想要   如果媒体正在播放，则显示暂停按钮如果不是播放按钮   打...

错误是当我在通知.addction中添加If条件时，它显示红线..

我完成了显示错误的代码......

服务代码是......

Foreground.java（班级名称）..

public class ForegroundService extends Service {
    private static final String LOG_TAG = "ForegroundService";
    public static boolean IS_SERVICE_RUNNING = false;
    final MediaPlayer mp=new MediaPlayer();

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        if (intent.getAction().equals(Constants.ACTION.STARTFOREGROUND_ACTION)) {
            Log.i(LOG_TAG, "Received Start Foreground Intent ");
            showNotification();
            //-------------------------------------------

            try{
                //you can change the path, here path is external directory(e.g. sdcard) /Music/maine.mp3
                mp.setDataSource(Environment.getExternalStorageDirectory().getPath()+"/downloadedfile.mp3");

                mp.prepare();
            }catch(Exception e){e.printStackTrace();}


            mp.start();


            //-------------------------------------
            Toast.makeText(this, "Service Started!", Toast.LENGTH_SHORT).show();

        } else if (intent.getAction().equals(Constants.ACTION.PREV_ACTION)) {
            Log.i(LOG_TAG, "Clicked Previous");

            Toast.makeText(this, "Clicked Previous!", Toast.LENGTH_SHORT)
                    .show();
        } else if (intent.getAction().equals(Constants.ACTION.PAUSE_ACTION)) {
            Log.i(LOG_TAG, "Clicked Play");


            Toast.makeText(this, "Clicked Play!", Toast.LENGTH_SHORT).show();
        } else if (intent.getAction().equals(Constants.ACTION.NEXT_ACTION)) {
            Log.i(LOG_TAG, "Clicked Next");

            Toast.makeText(this, "Clicked Next!", Toast.LENGTH_SHORT).show();
        } else if (intent.getAction().equals(
                Constants.ACTION.STOPFOREGROUND_ACTION)) {
            Log.i(LOG_TAG, "Received Stop Foreground Intent");
            stopForeground(true);
            stopSelf();
        }
        return START_STICKY;
    }

    private void showNotification() {

        Intent notificationIntent = new Intent(this, MainActivity.class);
        notificationIntent.setAction(Constants.ACTION.MAIN_ACTION);
        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
                | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
                notificationIntent, 0);

        Intent previousIntent = new Intent(this, ForegroundService.class);
        previousIntent.setAction(Constants.ACTION.PREV_ACTION);
        PendingIntent ppreviousIntent = PendingIntent.getService(this, 0,
                previousIntent, 0);

        Intent playIntent = new Intent(this, ForegroundService.class);
        playIntent.setAction(Constants.ACTION.PLAY_ACTION);
        PendingIntent pplayIntent = PendingIntent.getService(this, 0,
                playIntent, 0);


//---------------------------------------------------------------------------------
        Intent pauseIntent = new Intent(this, ForegroundService.class);
        pauseIntent.setAction(Constants.ACTION.PAUSE_ACTION);
        PendingIntent ppauseIntent = PendingIntent.getService(this, 0,
                playIntent, 0);
//------------------------------------------------------------------------


        Intent nextIntent = new Intent(this, ForegroundService.class);
        nextIntent.setAction(Constants.ACTION.NEXT_ACTION);
        PendingIntent pnextIntent = PendingIntent.getService(this, 0,
                nextIntent, 0);

        Bitmap icon = BitmapFactory.decodeResource(getResources(),
                R.drawable.aa);

        Notification notification = new NotificationCompat.Builder(this)
                .setContentTitle("TutorialsFace Music Player")
                .setTicker("TutorialsFace Music Player")
                .setContentText("My song")
                .setSmallIcon(R.drawable.aa)
                .setLargeIcon(Bitmap.createScaledBitmap(icon, 128, 128, false))
                .setContentIntent(pendingIntent)
                .setOngoing(true)
                .addAction(android.R.drawable.ic_media_previous, "Previous",
                        ppreviousIntent)
//---------------------------------------------------------------------------
                if(mp.isPlaying()){
                    .addAction(android.R.drawable.ic_media_play, "Play",
                            pplayIntent)
                }
        else{
                    .addAction(android.R.drawable.ic_media_pause, "Pause",
                            pplayIntent)
                }

//------------------------------------------------------------------------------------------------

                .addAction(android.R.drawable.ic_media_next, "Next",
                        pnextIntent).build();
        startForeground(Constants.NOTIFICATION_ID.FOREGROUND_SERVICE,
                notification);

    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.i(LOG_TAG, "In onDestroy");
        Toast.makeText(this, "Service Detroyed!", Toast.LENGTH_SHORT).show();
    }

    @Override
    public IBinder onBind(Intent intent) {
        // Used only in case if services are bound (Bound Services).
        return null;
    }
}

我添加的代码是Put Inside the Line .....

任何人都可以建议我使用精确代码或Displayig播放和暂停按钮Simultaneoisly ??谢谢

Answer 1

我建议你需要为媒体播放器使用自定义视图。 Here这是一个教程，你如何做到这一点。 简而言之：您需要使用：

notification = new Notification.Builder(this).build();
notification.contentView = views;
notification.bigContentView = bigViews;

提供自定义和展开的自定义视图。

接下来，您不仅需要在开始显示通知时更新通知，还需要在按播放或暂停按钮的任何时候更新通知。所以你需要改变：

} else if (intent.getAction().equals(Constants.ACTION.PAUSE_ACTION)) {
    Log.i(LOG_TAG, "Clicked Play");
    Toast.makeText(this, "Clicked Play!", Toast.LENGTH_SHORT).show();
}

在

} else if (intent.getAction().equals(Constants.ACTION.PAUSE_ACTION)) {
    Log.i(LOG_TAG, "Clicked Pause");
    mp.pause();
    showNotification();
    Toast.makeText(this, "Clicked Pause!", Toast.LENGTH_SHORT).show();
} else if (intent.getAction().equals(Constants.ACTION.PLAY_ACTION)) {
    Log.i(LOG_TAG, "Clicked Play");
    mp.start();
    showNotification();
    Toast.makeText(this, "Clicked Play!", Toast.LENGTH_SHORT).show();
}

这样的事情。希望你有主意。

Answer 2

在if之前放置一个半冒号，然后使用通知对象将操作设置如下：

if（mp.isPlaying（））notification.addAction（android.R.drawable.ic_media_play，＆＃34; Play＆＃34;， pplayIntent）; 其他通知.addAction（android.R.drawable.ic_media_pause，＆＃34; Pause＆＃34;， pplayIntent）;

我想这会做你的工作

Android：音乐播放器上的通知错误。？

2 个答案: