I'm drawing a graph, and for this I am using a Class that extends from SurfaceView .
The screen where it will be drawn has a background image.
So, to make SurfaceView transparent, I did the following:
setBackgroundColor(Color.TRANSPARENT);
setZOrderOnTop(true);
surfaceHolder = getHolder();
surfaceHolder.setFormat(PixelFormat.TRANSPARENT);
It worked! the area of SurfaceView was transparent, but when I scroll on the screen, SurfaceView is above Toolbar .
I think it's due to the following line:
setZOrderOnTop(true);
But if I remove, or hedge like false the background turns black!
How can I make a SurfaceView transparent and keep Z below Toolbar ?