Android Open Source - Space.Sprint Render Thread

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License

The source code is released under:

GNU General Public License

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Java Source Code

package com.obisapps.spacerun;
//ww  w  .j a va 2s .  c  o  m
import android.graphics.Canvas; 
import android.view.SurfaceHolder;

public class RenderThread extends Thread{
  
  //private static final String TAG = RenderThread.class.getSimpleName();
  
  private final static int maxFPS = 50;
  private final static int maxFrameSkips = 5;
  private final static int framePeriod = 1000 / maxFPS;
  
  private SurfaceHolder surfaceHolder;
  
  private GameView gameView;
  
  private boolean running;
  
  
  public void setRunning(boolean running) {
    this.running = running;
  }
  
  public RenderThread(SurfaceHolder surfaceHolder, GameView gameView) {
    super();
    
    this.surfaceHolder = surfaceHolder;
    
    this.gameView = gameView;
  
  }

    @Override
    public void run() {
      Canvas canvas;
      //Log.d(TAG, "Starting Game Loop");
      
      long beginTime;
      long timeDiff;
      int sleepTime;
      int framesSkipped;
      
      sleepTime = 0;
      
      while (running) {
        canvas = null;
        
        try {
          canvas = this.surfaceHolder.lockCanvas();
            
            synchronized (surfaceHolder) {
            
              beginTime = System.currentTimeMillis();
              framesSkipped = 0;
            
                //Log.d(TAG, "Running Update");
              this.gameView.update(canvas, System.currentTimeMillis());
              //Log.d(TAG, "Running Render");
              this.gameView.render(canvas);
              
              timeDiff = (System.currentTimeMillis() - beginTime);  
              sleepTime = (int) (framePeriod - timeDiff);
              
              
              if (sleepTime > 0) {          
                try {            
                  Thread.sleep(sleepTime);            
                } catch (InterruptedException e) {
          
                }
      
              }  
              while (sleepTime < 0 && framesSkipped < maxFrameSkips) {    
                this.gameView.update(canvas, System.currentTimeMillis());
                sleepTime += framePeriod;
                framesSkipped ++;  
              }      
            }           
          } finally {
            if (canvas != null) {      
              surfaceHolder.unlockCanvasAndPost(canvas);        
            }      
          }    
        }  
        }

}

Java Source Code List