title: show hide image in android
body: <p>i have a code like this
  Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.correct);
  newImg = (ImageView)findViewById(R.id.rwans);
  newImg.setImageBitmap(bm);</p>
  
  <p>but i want after a second, image should fade out or it display nothing or as previous state.
  thank you</p>