SDLActivity.java

// Key events
    @Override
    public boolean onKey(View  v, int keyCode, KeyEvent event) {
    
    // Dispatch the different events depending on where they come from
        // Some SOURCE_DPAD or SOURCE_GAMEPAD are also SOURCE_KEYBOARD
        // So, we try to process them as DPAD or GAMEPAD events first, if that fails we try them as KEYBOARD
		if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
			keyCode = KeyEvent.KEYCODE_ENTER;
		}
        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            //Log.v("SDL", "key down: " + keyCode);
            SDLActivity.onNativeKeyDown(keyCode);
            return true;
        }
		if (event.getAction() == KeyEvent.ACTION_UP) {
            //Log.v("SDL", "key up: " + keyCode);
            SDLActivity.onNativeKeyUp(keyCode);
            return true;
        }
		if (true) {
			return false;
		}
    
        // Dispatch the different events depending on where they come from
        // Some SOURCE_DPAD or SOURCE_GAMEPAD are also SOURCE_KEYBOARD
        // So, we try to process them as DPAD or GAMEPAD events first, if that fails we try them as KEYBOARD

        if ( (event.getSource() & 0x00000401) != 0 || /* API 12: SOURCE_GAMEPAD */
                   (event.getSource() & InputDevice.SOURCE_DPAD) != 0 ) {
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                if (SDLActivity.onNativePadDown(event.getDeviceId(), keyCode) == 0) {
                    return true;
                }
            } else if (event.getAction() == KeyEvent.ACTION_UP) {
                if (SDLActivity.onNativePadUp(event.getDeviceId(), keyCode) == 0) {
                    return true;
                }
            }
        }

        if( (event.getSource() & InputDevice.SOURCE_KEYBOARD) != 0) {
            if (event.getAction() == KeyEvent.ACTION_DOWN) {
                //Log.v("SDL", "key down: " + keyCode);
                SDLActivity.onNativeKeyDown(keyCode);
                return true;
            }
            else if (event.getAction() == KeyEvent.ACTION_UP) {
                //Log.v("SDL", "key up: " + keyCode);
                SDLActivity.onNativeKeyUp(keyCode);
                return true;
            }
        }

        return false;
    }