Question

i have an imageview in my xml file and i want to put another image over it where user clicks.
i have used a canvas to place an image where user clicks but i am stuck when it comes to putting the canvas over my imageview.
Or is there any way around when we want to put another image over an imageview while detecting user clicks?
Thanks

Answer 1

Since you’re already overriding a View method, I would say have that draw the image rather than an ImageView. Your onDraw() method would essentially be:

@Override
public void onDraw(Canvas canvas) {
  canvas.drawBitmap(bottomBitmap, xCorner, yCorner, paintObject);
  canvas.drawBitmap(topImage, fingerXCorner, fingerYCorner, paintObject);
}

EDIT:

Alternatively, if you want to keep the ImageView because of the convenient scaletypes, then you can override a FrameLayout. Place the ImageView inside of it, then override the draw() method to draw a bitmap.

@Override
public void draw(Canvas canvas) {
  super.draw(canvas); // draws everything in the FrameLayout
  canvas.drawBitmap(topImage, fingerXCorner, fingerYCorner, paintObject);
}