该活动的其余动作与前面所述的SnapShot示例基本相同。

public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {

     camera.startPreview();

} 

public void surfaceCreated(SurfaceHolder holder) { 

     camera = Camera.open();

     try {

           camera.setPreviewDisplay(holder);

           Camera.Parameters parameters = camera.getParameters();

           if (this.getResources().getConfiguration().orientation !=

             Configuration.ORIENTATION_LANDSCAPE) 

           {

                parameters.set("orientation", "portrait");

                // 对于Android 2.2及以上版本

                camera.setDisplayOrientation(90);

                // 对于Android 2.0及以上版本

                parameters.setRotation(90);

           } 

           camera.setParameters(parameters);

     } 

     catch (IOException exception) 

     { 

          camera.release();

     } 

} 

public void surfaceDestroyed(SurfaceHolder holder) { 

   camera.stopPreview();

     camera.release();

}