Android Wear：时钟下的Peek卡背景

Question

I am trying to build an analog version of "Simple" watch face. Example code is clear enough, I based my code on SweepWatchFaceService.java, but when I set .setBackgroundVisibility(WatchFaceStyle.BACKGROUND_VISIBILITY_PERSISTENT) on surface holder, it covers the clocks (canvas). Is there a simple way to render peek card background as a surface holder (watch face) background?

Answer 1

It is not possible.

The watch face is rendered as a wallpaper, while the notification backgrounds are rendered inside the top activity. As a results, the backgrounds are always over the watch face.

The reason you can show the digital watch face (if you set the WatchFaceStyle option) is because the top activity also renders that.