Android获取网络图片并显示的方法

public class MainActivity extends AppCompatActivity {
  Button button;
  ImageView imageView;
  String url = "http://i4.buimg.com/dccba6282641a9e0.jpg";
  //String textURL = "http://192.168.1.104:8080/add.jsp";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    button = (Button) findViewById(R.id.button);
    imageView = (ImageView) findViewById(R.id.imageView);

    button.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        new Thread(new Runnable() {
          @Override
          public void run() {
            Bitmap bmp = getURLimage(url);
            Message msg = new Message();
            msg.what = 0;
            msg.obj = bmp;
            System.out.println("000");
            handle.sendMessage(msg);
          }
        }).start();
      }
    });
  }

  //在消息队列中实现对控件的更改
  private Handler handle = new Handler() {
    public void handleMessage(Message msg) {
      switch (msg.what) {
        case 0:
          System.out.println("111");
          Bitmap bmp=(Bitmap)msg.obj;
          imageView.setImageBitmap(bmp);
          break;
      }
    };
  };

  //加载图片
  public Bitmap getURLimage(String url) {
    Bitmap bmp = null;
    try {
      URL myurl = new URL(url);
      // 获得连接
      HttpURLConnection cOnn= (HttpURLConnection) myurl.openConnection();
      conn.setConnectTimeout(6000);//设置超时
      conn.setDoInput(true);
      conn.setUseCaches(false);//不缓存
      conn.connect();
      InputStream is = conn.getInputStream();//获得图片的数据流
      bmp = BitmapFactory.decodeStream(is);//读取图像数据
      //读取文本数据
      //byte[] buffer = new byte[100];
      //inputStream.read(buffer);
      //text = new String(buffer);
      is.close();
    } catch (Exception e) {
      e.printStackTrace();
    }
    return bmp;
  }
}