After the Android mobile phone is set to untitled, the program fails to solve the problem (how to set the full screen untitled mobile phone with the simplest statement)

After the phone is set to untitled, it will always go down. At first it was thought that it was a layout problem. If it was changed, it was still not in progress. Then we created a new project and found that it was still not in progress! What's going on? I used to do this. I used to set full screen without title. These statements must be located before setcontentview! Remember! I am still not familiar with this knowledge, so I wrote this article and reviewed it!

Set no title + full screen:

Requestwindowfeature (window. feature_no_title );
Int flag = windowmanager. layoutparams. flag_fullscreen;
Window mywindow = This. getwindow ();
Mywindow. setflags (flag, flag );

These four statements are very short and better than the methods I have previously set!