Android Vibrate on touch?

please try this :

Button b = (Button) findViewById(R.id.button1);
    b.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // TODO Auto-generated method stub
            Vibrator vb = (Vibrator)   getSystemService(Context.VIBRATOR_SERVICE);
            vb.vibrate(100);
            return false;
        }
    });

and add this permission to manifest.xml

 <uses-permission android:name="android.permission.VIBRATE"/>

According to this answer, you can perform haptic feedback (vibrate) without asking for any extra permissions. Look at performHapticFeedback method.

View view = findViewById(...)
view.performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY);

Note: I have not tested this code.