Solution 1 :
Android Matrix has a mapPoints method of RectF, it depends on how exactly you have rotated the bitmap, if you have drawn it with drawBitmap with a Matrix you can just re-use that Matrix.
You can getMatix on a View as getting the Matrix from the Canvas is deprecated.
How can i map a RectF bounding box on android if the bitmap is (or not) rotated ?
I already have the RectF on the left image, need to map its coordinates to the right image.
Comment posted by Community
Please provide enough code so others can better understand or reproduce the problem.