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Android基本游戏循环实例分析

转载 作者：qq735679552 更新时间：2022-09-27 22:32:09 25 4
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本文实例讲述了Android基本游戏循环。分享给大家供大家参考。具体如下:

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// desired fps
private final static int  MAX_FPS = 50 ;
// maximum number of frames to be skipped
private final static int  MAX_FRAME_SKIPS = 5 ;
// the frame period
private final static int  FRAME_PERIOD = 1000 / MAX_FPS;
@Override
public void run() {
   Canvas canvas;
   Log.d(TAG, "Starting game loop" );
   long beginTime;   // the time when the cycle begun
   long timeDiff;   // the time it took for the cycle to execute
   int sleepTime;   // ms to sleep (<0 if we're behind)
   int framesSkipped; // number of frames being skipped
   sleepTime = 0 ;
   while (running) {
     canvas = null ;
     // try locking the canvas for exclusive pixel editing
     // in the surface
     try {
       canvas = this .surfaceHolder.lockCanvas();
       synchronized (surfaceHolder) {
         beginTime = System.currentTimeMillis();
         framesSkipped = 0 ; // resetting the frames skipped
         // update game state
         this .gamePanel.update();
         // render state to the screen
         // draws the canvas on the panel
         this .gamePanel.render(canvas);
         // calculate how long did the cycle take
         timeDiff = System.currentTimeMillis() - beginTime;
         // calculate sleep time
         sleepTime = ( int )(FRAME_PERIOD - timeDiff);
         if (sleepTime > 0 ) {
           // if sleepTime > 0 we're OK
           try {
             // send the thread to sleep for a short period
             // very useful for battery saving
             Thread.sleep(sleepTime);
           } catch (InterruptedException e) {}
         }
         while (sleepTime < 0 && framesSkipped < MAX_FRAME_SKIPS) {
           // we need to catch up
           // update without rendering
           this .gamePanel.update();
           // add frame period to check if in next frame
           sleepTime += FRAME_PERIOD;
           framesSkipped++;
         }
       }
     } finally {
       // in case of an exception the surface is not left in
       // an inconsistent state
       if (canvas != null ) {
         surfaceHolder.unlockCanvasAndPost(canvas);
       }
     }  // end finally
   }
}

希望本文所述对大家的Android程序设计有所帮助.

最后此篇关于Android基本游戏循环实例分析的文章就讲到这里了,如果你想了解更多关于Android基本游戏循环实例分析的内容请搜索CFSDN的文章或继续浏览相关文章，希望大家以后支持我的博客！ 。

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