Android线程中Handle的使用讲解

public class BallHandler extends Handler{
  ImageView imageview;
  Bitmap bitmap;
  public BallHandler(ImageView imageview,Bitmap bitmap){
    super();
    this.imageview=imageview;
    this.bitmap=bitmap;
  }
  public void handleMessage(Message msg){
      bitmap =(Bitmap)msg.obj;
      imageview.setImageBitmap(bitmap);
  }

Message msg = new Message();
      msg.obj = bitmap;
      handler.sendMessage(msg);