cocos2d-x在android真机上设置帧率无效的问题

通过setAnimationInterval设置帧频时，发现在android下没有效果的

在Cocos2dxRenderer .java文件里面找到了onDrawFrame这个函数。里面有句注释 ：

FPS controlling algorithm is not accurate, and it will slow down FPS on some devices. So comment FPS controlling code.

这个函数里的大部分代码都被注释掉了

 public void onDrawFrame(final GL10 gl) {

 /*
  * FPS controlling algorithm is not accurate, and it will slow down FPS
  * on some devices. So comment FPS controlling code.
  */

  /*
  final long nowInNanoSeconds = System.nanoTime();
  final long interval = nowInNanoSeconds - this.mLastTickInNanoSeconds; */

  // should render a frame when onDrawFrame() is called or there is a
  // "ghost"
 Cocos2dxRenderer.nativeRender();

  /*
 // fps controlling if (interval < Cocos2dxRenderer.sAnimationInterval) { try {
 // because we render it before, so we should sleep twice time interval
 Thread.sleep((Cocos2dxRenderer.sAnimationInterval - interval) /Cocos2dxRenderer.NANOSECONDSPERMICROSECOND);
 } catch (final Exception e) { }
  }

 this.mLastTickInNanoSeconds = nowInNanoSeconds;
 */

 }

经过google后暂时找到了解决方案，是否有问题需要待测试：

 private long renderingElapsedTime;

 @Override
 public void onDrawFrame(final GL10 gl) {
     /*
      * FPS controlling algorithm is not accurate, and it will slow down FPS
      * on some devices. So comment FPS controlling code.
      */

     try {
         if (renderingElapsedTime< Cocos2dxRenderer.sAnimationInterval) {
             Thread.sleep((Cocos2dxRenderer.sAnimationInterval - renderingElapsedTime) / NANOSECONDSPERMICROSECOND);
         }
     } catch (InterruptedException e) {
         e.printStackTrace();
     }

     // Get the timestamp when rendering started
     long renderingStartedTimestamp = System.nanoTime();

     // should render a frame when onDrawFrame() is called or there is a
     // "ghost"
     Cocos2dxRenderer.nativeRender();

     // Calculate the elapsed time during rendering
     renderingElapsedTime = (System.nanoTime() - renderingStartedTimestamp);
 }