首先，进入到引擎目录的cocos\platform\android\java\src\org\cocos2dx\lib，打开Cocos2dxGLSurfaceView.java文件，
找到onKeyDown方法，方法如下：
public boolean onKeyDown(final int pKeyCode, final KeyEvent pKeyEvent) { switch (pKeyCode) { case KeyEvent.KEYCODE_BACK: Cocos2dxVideoHelper.mVideoHandler.sendEmptyMessage(Cocos2dxVideoHelper.KeyEventBack); case KeyEvent.KEYCODE_MENU: case KeyEvent.KEYCODE_DPAD_LEFT: case KeyEvent.KEYCODE_DPAD_RIGHT: case KeyEvent.KEYCODE_DPAD_UP: case KeyEvent.KEYCODE_DPAD_DOWN: case KeyEvent.KEYCODE_ENTER: case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE: case KeyEvent.KEYCODE_DPAD_CENTER: this.queueEvent(new Runnable() { @Override public void run() { Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleKeyDown(pKeyCode); } }); return true; default: return super.onKeyDown(pKeyCode, pKeyEvent); } }
修改为：
public boolean onKeyDown(final int pKeyCode, final KeyEvent pKeyEvent) { switch (pKeyCode) { case KeyEvent.KEYCODE_BACK: return false; //Cocos2dxVideoHelper.mVideoHandler.sendEmptyMessage(Cocos2dxVideoHelper.KeyEventBack); case KeyEvent.KEYCODE_MENU: case KeyEvent.KEYCODE_DPAD_LEFT: case KeyEvent.KEYCODE_DPAD_RIGHT: case KeyEvent.KEYCODE_DPAD_UP: case KeyEvent.KEYCODE_DPAD_DOWN: case KeyEvent.KEYCODE_ENTER: case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE: case KeyEvent.KEYCODE_DPAD_CENTER: this.queueEvent(new Runnable() { @Override public void run() { Cocos2dxGLSurfaceView.this.mCocos2dxRenderer.handleKeyDown(pKeyCode); } }); return true; default: return super.onKeyDown(pKeyCode, pKeyEvent); } }
然后在主Activity里面重写onKeyDown方法，在游戏中点击返回按钮，就可以进入到重写的onKeyDown方法里面了。
在cocos2dx的android项目中，怎么让onKeyDown方法执行
原文：http://www.cnblogs.com/Colored-Mr/p/4959787.html