3.3.1 update causes text to render weirdly with alpha effected by view background about materialtaptargetprompt

[peterdk]

I did some tinkering with the code, and instead of the Xtransfermode in the PromptText, I just clip the text in MaterialTapTargetPrompt class with a new property of PromptBackground that supplies the background's path. Now hardware layer works as well, and no weird effects. I would say that is a better approach.

 //Draw the text
            Path backgroundPath = mPromptOptions.getPromptBackground().getPath();
            if (backgroundPath != null) {
                canvas.save();

                canvas.clipPath(backgroundPath, Region.Op.INTERSECT );
            }
            mPromptOptions.getPromptText().draw(canvas);
            if (backgroundPath != null) {
                canvas.restore();
            }

I can make a more official PR for it, and testing with the other backgrounds as well and implementing the path for them.

[peterdk]

I created a PR, it fixes the issue. Let me know if it is acceptable or needs changing.

[danilodanicomendes]

Damn, seems like I only thought of my use case with that xfermode change. Sorry about that.
To fix this, keeping PorterDuff, would definitely add a lot of complexity (if fixable at all)

I looked at your PR and I do agree that this is a better approach and more bullet proof for other use cases.

[peterdk]

No problem, it was nice seeing someone having the same intent to fix the issue! You can't account for all cases, and I assume it worked for your case.