Android how to set transparency to custom part of ImageView

I would like to set a custom part of an image view to be transparent. However, the partial view inside does not have to be a rectangle. It could be parallelogram, triangle, etc... I know I can retrieve the corners of the shape that I want to set to transparent, I just don't know what to do with those inputs.

Any help is appreciated!


You will have to manually manipulate a bitmap that you set to the image view.

Bitmap someBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.someimage);

Code not tested.

Try this imageView.setBackgroundColor(Color.TRANSPARENT);

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