title: Canvas to ImageView problem in Android
body: <p>I want to display Canvas contents on ImageView in android,</p>
  
  <p>but ImageView displaying blank.</p>
  
  <pre><code>Bitmap imgBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.image);
  Canvas canvas = new Canvas();
  Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
  
  canvas.drawBitmap(imgBitmap, 0, 0, paint);
  
  paint.setColor(Color.BLACK);
  paint.setAlpha(100);
  canvas.drawRect(0, 0, 100, 100, paint); // transparent black on image
  
  imgView.draw(canvas);
  </code></pre>
  
  <p>what is the problem? and what should I do?</p>