How to press physical buttons of android programatically

Question

I want to press volume button programatically. In Java it is possible using the robot class, but in Android there is no robot class.

I am wondering how to achieve this in Android.

Answer 1

I would suggest you to increase/decrease the volume programmatically which would be a tad bit easier, however if you want to use it for some other process then you can check the code below - EDIT - The snippet I gave before doesn't work, but this one does. It uses a runnable so the try catch block is necessary.

 new Thread(new Runnable() {         
            @Override
            public void run() {
                try {
                    Instrumentation inst = new Instrumentation();
                    //This is for Volume Down, change to 
                    //KEYCODE_VOLUME_UP for Volume Up.
                    inst.sendKeyDownUpSync(KeyEvent.KEYCODE_VOLUME_DOWN);
                }catch(InterruptedException e){}
            }   
        }).start();