Today in the forum to see a post, and finally found out that I have a long time of a puzzle, Android can not achieve the iOS corner mark effect, QQ is how to achieve. Read this post immediately finally lifted my confusion.
First of all, a general idea:
We all know that the Android system does not support the corner label by default. But sometimes you can see the corner mark on many systems, including the Xiaomi phone's MIUI Samsung phone's touchwiz Sony mobile phone; The system applications of these phones can display digital corner labels. This is to be customized for these systems, using their own launcher. So the idea of implementing these systems is to use the private API of these phones to achieve the display of the corner mark. But there's a part of the phone. The implementation method is to create a shortcut to an app with a corner label by using a shortcut. When you need to update the corner label, you can do so by updating the shortcut.
This is how the entire post is implemented. Last attached link: http://www.eoeandroid.com/thread-542394-1-1.html
Android adds digital corner labels to your app