Android button ontouch fadeout effect

AlphaAnimation alphaDown,alphaUp;

 

_button = (Button)findViewById(R.id.button1);

//set animation

alphaDown = new AlphaAnimation(1.0f, 0.5f);

alphaUp = new AlphaAnimation(0.5f, 1.0f);

alphaDown.setDuration(100);

alphaUp.setDuration(100);

alphaDown.setFillAfter(true);

alphaUp.setFillAfter(true);

 

//set OnTouchListener

_button.setOnTouchListener(new View.OnTouchListener() {

   @Override

   public boolean onTouch(View v, MotionEvent event) {

   // TODO Auto-generated method stub

    if(event.getAction()==MotionEvent.ACTION_DOWN)

        _button.startAnimation(alphaDown);

    if(event.getAction()==MotionEvent.ACTION_UP)

        _button.startAnimation(alphaUp);

    return false;

     }

});

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