Notification for android music player

Question

How to control a music player from buttons in notification, and how to listen button action from the notification

Solution

You should use setOnClickPendingIntent() of RemoteViews to listen button action from the notification.

The method setOnClickPendingIntent() will bind a PendingIntent to response the button click event.

The sample code is like this:

private void showControllerInNotification() {       
    PendingIntent pendingIntent = null;
    Intent intent = null;


    //Inflate a remote view with a layout which you want to display in the notification bar.
    if (mRemoteViews == null) {
        mRemoteViews = new RemoteViews(getPackageName(),
                R.layout.notification_control_bar);
    }   

    //Define what you want to do after clicked the button in notification.
    //Here we launcher a service by an action named "ACTION_STOP" which will stop the music play.
    intent = new Intent(ACTION_STOP);       
    pendingIntent = PendingIntent.getService(getApplicationContext(),
            REQUEST_CODE_STOP, intent,
            PendingIntent.FLAG_UPDATE_CURRENT);

    //In R.layout.notification_control_bar,there is a button view identified by bar_btn_stop
    //We bind a pendingIntent with this button view so when user click the button,it will excute the intent action.
    mRemoteViews.setOnClickPendingIntent(R.id.bar_btn_stop,
            pendingIntent);

    //Create the notification instance.
    mNotification = new NotificationCompat.Builder(getApplicationContext())
            .setSmallIcon(R.drawable.ic_launcher).setOngoing(true)
            .setWhen(System.currentTimeMillis())                
            .setContent(mRemoteViews)
            .build();

    //Show the notification in the notification bar.
    mNotifiManager.notify(NOTIFICATION_ID, mNotification);      
}   

update 1:

The service which responses the action is like this:

public class MediaPlayerService extends Service {

    public static final String ACTION_STOP="xxx.yyy.zzz.ACTION_STOP";
    public static final String ACTION_PLAY="xxx.yyy.zzz.ACTION_PLAY";
    public static final String ACTION_PAUSE="xxx.yyy.zzz.ACTION_PAUSE";

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    if (intent != null) {
        String action = intent.getAction();         
        if (!TextUtils.isEmpty(action)) {
            if (action.equals(ACTION_PLAY)) {
                startPlay();
            }else if(action.equals(ACTION_PAUSE)) {
                pausePlay();
            }else if(action.equals(ACTION_STOP)) {
                stopPlay();
            }
        }
    }
    return super.onStartCommand(intent, flags, startId);
}
private void stopPlay(){
    // do the play work here
}
private void stopPause(){
    // do the pause work here
}
private void stopPlay(){
    // do the stop work here
}

}

Register the service in manifest:

    <service
        android:name="xxx.yyy.zzz.MusicPlayService"
        android:exported="false" >
        <intent-filter>
            <action android:name="xxx.yyy.zzz.ACTION_PLAY" />
            <action android:name="xxx.yyy.zzz.ACTION_PAUSE" />
            <action android:name="xxx.yyy.zzz.ACTION_STOP" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </service>

For the music play control,you can copy some useful code sinppets from here.

Comments

[Helal Khan]

@AvatarQing gives me a suggestion. I build a notification big view using RemoteView to control play/pause like this link (stackoverflow.com/questions/14508369/…) All are right but when i click device back button and out from the application click event(Play/Pause/Forward/Close) button doesn't work.Please help me.

[Riki]

Did you do the play/pause controls in Activity,not in Service?

[juztcode]

can you explain the intent filter in the service please?

[Riki]

@juztcode those are your custom actions you could define

[juztcode]

@AvatarQing , these are optional or mandatory? I've followed tutorials and these weren't mentioned

[Riki]

@juztcode the action is correspond to the intent that you pass to PendingIntent.getService() , whether it's necessary or not depends on your need.