how to write word for app on screen

I want do an ap开发者_运维知识库p,i want it look the same as this one:

I don't know how to write the word "writing" as the red mark ,and how to add the app icon on the screen.

The answer is simple and yet annoying: It is not possible using the standard lock screen. Source of Android's lock screen describes where to find the source code of the default lock screen, and if you look into the source code of LockScreen.java you will find out that this information is hard coded. So basically you will have to wait for a new Android version to support this feature or program your own lock screen, which kind of misses the point. :-/

I only found a comment in the docu here that it could be possible to add a widget to the lock screen sometime. Any than this I found some apps that deliver a complete alternative lock screen.

So my guess it, that the clock on your screen is only able to show the info on the lock screen due to an extra (HTC?)-API that is not available for third party developer as suggested here: https://stackoverflow.com/questions/3556430 too.