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

    // It shows buttons on lock screen (notification).

Notification notification = new Notification.Builder(context)
    .setVisibility(Notification.VISIBILITY_PUBLIC)
    .setSmallIcon(R.drawable.NotIcon)
    .addAction(R.drawable.ic_prev, "button1",ButtonOneScreen) 
    .addAction(R.drawable.ic_pause, "button2", ButtonTwoScreen)  
   .....
    .setStyle(new Notification.MediaStyle()
    .setShowActionsInCompactView(1)
    .setMediaSession(mMediaSession.getSessionToken())
    .setContentTitle("your choice")
    .setContentText("Again your choice")
    .setLargeIcon(buttonIcon)
    .build();

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