How to add button to notifications in android?

Question

My app plays music and when users open notifications screen by swiping from the top of the screen ( or generally from the bottom right of the screen on tablets ), I want to

Answer 1

tested, working code with android Pie. These all go inside the same service class.

Show a notification:

public void setNotification() {

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
    {
    NotificationChannel channel = new NotificationChannel("a", "status", NotificationManager.IMPORTANCE_DEFAULT);
    channel.setDescription("notifications");
    notificationManager = getSystemService(NotificationManager.class);
    notificationManager.createNotificationChannel(channel);

    }
else
    notificationManager =  (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);


Receiver.service = this;
Notification.MediaStyle style = new Notification.MediaStyle();

notification = new Notification.Builder(this)
        .setSmallIcon(R.mipmap.ic_launcher)
        .setContentTitle("Notification")
        .addAction(R.drawable.close_icon,  "quit_action", makePendingIntent("quit_action"))
        .setStyle(style);

style.setShowActionsInCompactView(0);

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
    {
    notification.setChannelId("a");
    }

// notificationManager.notify(123 , notification.build()); // pre-oreo
startForeground(126, notification.getNotification());
}

Helper function:

public PendingIntent makePendingIntent(String name)
    {
    Intent intent = new Intent(this, FloatingViewService.Receiver.class);
    intent.setAction(name);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
    return pendingIntent;
    }

To handle the actions:

static public class Receiver extends BroadcastReceiver {
static FloatingViewService service;

@Override
public void onReceive(Context context, Intent intent)
    {

    String whichAction = intent.getAction();

    switch (whichAction)
        {

        case "quit_action":
            service.stopForeground(true);
            service.stopSelf();
            return;

        }

    }
}

You'll need to update your manifest too: