A little bit in the launcher

Recently in the launcher to see the source code, should be able to learn something, bit by bit, think of what is what

First, there's a code to work with.

Https://github.com/callerge/AtoZLauncher Read the Readme will know how to do, declare launcher, remove invalid permissions, plus version 17-20

1.onKeyDown There is a such a way of writing = "Long press the Menu key, long press the home button these can do something!"

        // Eat The long press event so that the keyboard doesn ' t come up.        if (KeyCode = = Keyevent.keycode_menu && event.islongpress ())            {returntrue;        }

A little bit in the launcher