Invoke keypress event in android?

问题

I need to invoke a key press event in android . Any suggestions ?????

回答1:

You need to use the instrumentation class :

Instrumentation i = new Instrumentation();
i.sendKeyDownUpSync(KeyEvent.KEYCODE_A);

This should be equivalent to a A pressed on the keyboard.

回答2:

The following example shows how to invoke Key Back key event:

KeyEvent eventDown = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_BACK);
KeyEvent eventUp = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_BACK);
dispatchKeyEvent(eventDown);
dispatchKeyEvent(eventUp);

来源：https://stackoverflow.com/questions/3361281/invoke-keypress-event-in-android