public class cwjView extends SurfaceView implements SurfaceHolder.Callback {  
  
  
 public cwjView(Context context, AttributeSet attrs) {  
 super(context, attrs);  
 SurfaceHolder holder=getHolder();  
 holder.addCallback(this);   
   
 setFocusable(true);  
 }  
  
 public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {  
   
   
 }  
 
 public void surfaceCreated(SurfaceHolder holder) {  
   
   
 }  
 
 public void surfaceDestroyed(SurfaceHolder holder) {  
   
 
   
 }  
  
 @Override 
 public void onWindowFocusChanged(boolean hasWindowFocus) {  
   
 }  
    
}