Question

How do you convert Matrix to Bitmap/Drawable?

Answer 1

Actually I do not understand your question. But if you want to resize a image then this might be helpful for you:

 Bitmap bmap = BitmapFactory.decodeStream(getClass().getResourceAsStream("Your image path"));
int oldHeight= ..
int newHeight = ..
int oldWidth = ..
int newWidth = ..
scaleheight= newHeight/oldHeight
scaleWidth = newWidth/oldWidth
 Matrix matrix = new Matrix();
 matrix.postScale(scaleWidth, scaleHeight);
    // recreate the new Bitmap and set it back
    Bitmap resizedBatteryImage = Bitmap.createBitmap(bmap, 0, 0,oldWidth, oldHeight, matrix, true);