我这个是socket接收到的数据，并打印bitmap里面有数据了，长度，宽度，什么的都能获取到，但是就是不动态刷新imageView，这是为什么呢？

package com.freerdp.afreerdp.presentation;



import java.io.ByteArrayOutputStream;

import java.io.DataInputStream;

import java.net.ServerSocket;

import java.net.Socket;



import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.drawable.BitmapDrawable;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;



import com.freerdp.afreerdp.R;



public class SpActivity  extends Activity implements  OnClickListener {



	private ImageView img ;

	private Button btn ;

	@Override

	public void onCreate(Bundle savedInstanceState){



		super.onCreate(savedInstanceState);

		setContentView(R.layout.sp);



		img  = (ImageView)findViewById(R.id.spms);

		btn = (Button)findViewById(R.id.kaishi);



		btn.setOnClickListener(this);

	}



	public  void receiveFile(Socket socket) {

		System.out.println("rrrrrrrrrrrrrrrrrrr11111111111111111");

		DataInputStream dis = null;

		ByteArrayOutputStream bytestream = null;

		try {

			try {

				dis = new DataInputStream(socket.getInputStream());



				final BitmapDrawable bmpDraw=new BitmapDrawable(socket.getInputStream());

				final Bitmap bmp=bmpDraw.getBitmap();

				System.out.println("rrrrrrrrrrrrrrrrrr  bmp==null??"+(bmp==null));

				System.out.println("rrrrrrrrrrrrrrrrrr  bmp==getHeight??"+bmp.getHeight());

				System.out.println("rrrrrrrrrrrrrrrrrr  bmp==getRowBytes??"+bmp.getRowBytes());

				System.out.println("rrrrrrrrrrrrr  run()....");

				SpActivity.this.runOnUiThread(new Runnable() {

					@Override

					public void run() {

						img.setImageBitmap(bmp);

						img.postInvalidate();

					}

				});



				// 如果图片还未回收，先强制回收该图片  

				if (bmpDraw != null && !bmpDraw.getBitmap().isRecycled()){  

					bmpDraw.getBitmap().recycle();  

				}  



			} finally {

				if (bytestream != null)

					bytestream.close();

				if (dis != null)

					dis.close();

				if (socket != null)

					socket.close();

			}

		} catch (Exception e) {



		}

	}



	@Override

	public void onClick(View arg0) {

		if(arg0.getId()==btn.getId()){

			try {

				final ServerSocket server = new ServerSocket(9999);

				Thread th = new Thread(new Runnable() {

					public void run() {

						while (true) {

							try {

								System.out.println("rrrrrrrrrrrrrrrrr开始监听...");

								Socket socket = server.accept();

								System.out.println("rrrrrrrrrrrrrrrrrrrr有链接");

								receiveFile(socket);

							} catch (Exception e) {

							}

						}

					}

				});



				th.run(); //启动线程运行

			} catch (Exception e) {

				e.printStackTrace();

			}

		}

	}



}

打印出来的结果  rrrrrrrrrrrrrrrrrr  bmp==getHeight?? 768 
但是，imageView就是不刷新，为什么呢