Triangle Shaped Imageview With Drag, Scroll & Zoom Ontouch Android

I've added three different bitmap to one ImageView as shown in picture below. But the problem is that I cannot edit it after the Bitmap is set to ImageView. I want to drag, scroll

Solution 1:

here is a link for source example of how to mask image

https://github.com/hotveryspicy/MaskImage

ref from this question

Masking(crop) image in frame

EDIT

for individual zoom in and zoom out you want these three bitmaps in different layout (you need to make custom image view ) so try below URL that describe how to make your own custom layout (image view in triangle shape) etc.

https://github.com/thecodepath/android_guides/wiki/Defining-Custom-Views