SurfaceViewTest.java

package de.objectcode;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.Window;
import android.view.WindowManager;

public class SurfaceViewTest extends Activity {      
    FastRenderView renderView;            
        
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                             WindowManager.LayoutParams.FLAG_FULLSCREEN);
        renderView = new FastRenderView(this);
        setContentView(renderView);
    }      
    
    protected void onResume() {
        super.onResume();
        renderView.resume();
    }
    
    protected void onPause() {
        super.onPause();         
        renderView.pause();
    }    
    
    class FastRenderView extends SurfaceView implements Runnable {
        Thread renderThread = null;
        SurfaceHolder holder;
        volatile boolean running = false;
        
        public FastRenderView(Context context) {
            super(context);           
            holder = getHolder();            
        }

        public void resume() {          
            running = true;
            renderThread = new Thread(this);
            renderThread.start();         
        }
        
        public void pause() {        
            running = false;                        
            while(true) {
                try {
                    renderThread.join();
                    break;
                } catch (InterruptedException e) {
                    // retry
                }
            }
            renderThread = null;        
        }
        
        public void run() {
            while(running) {  
                if(!holder.getSurface().isValid())
                    continue;
                
                Canvas canvas = holder.lockCanvas();            
                drawSurface(canvas);                                           
                holder.unlockCanvasAndPost(canvas);            
            }
        }        
        
        private void drawSurface(Canvas canvas) {
            canvas.drawRGB(255, 0, 0);
        }
    }   
}