cocos2d-x编译安卓版本时实现“再按一次退出程序”的效果(2)

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package com.planefight.org;

import org.cocos2dx.lib.Cocos2dxActivity;
import org.cocos2dx.lib.Cocos2dxGLSurfaceView;

import android.os.Bundle;
import android.view.KeyEvent;
import android.widget.Toast;

public class PlaneFight extends Cocos2dxActivity{
	private long exitTime = 0;
    protected void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceState);	
	}

    public Cocos2dxGLSurfaceView onCreateView() {
    	Cocos2dxGLSurfaceView glSurfaceView = new Cocos2dxGLSurfaceView(this);
    	// PlaneFight should create stencil buffer
    	glSurfaceView.setEGLConfigChooser(5, 6, 5, 0, 16, 8);
    	
    	return glSurfaceView;
    }
    
    
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) 
    {
	     if(keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN)
	     {    
				if((System.currentTimeMillis()-exitTime) > 2000)  //System.currentTimeMillis()无论何时调用，肯定大于2000
			     {
			      Toast.makeText(getApplicationContext(), "再按一次退出程序",Toast.LENGTH_SHORT).show();                                
			      exitTime = System.currentTimeMillis();
			     }
			     else
			     {
			         finish();
			         System.exit(0);
			     }
			             
			     return true;
	     }
	     return super.onKeyDown(keyCode, event);
    }
    

    static {
        System.loadLibrary("cocos2dcpp");
    }     
}

这样，就实现了在安卓应用任何页面按返回键均有提示“再按一次退出程序”；

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