package com.example.urlimage;    import java.io.InputStream;  import java.net.HttpURLConnection;  import java.net.URL;    import android.app.Activity;  import android.graphics.Bitmap;  import android.graphics.BitmapFactory;  import android.os.Bundle;  import android.os.Handler;  import android.os.Message;  import android.view.View;  import android.widget.Button;  import android.widget.ImageView;    public class MainActivity extends Activity {        //声明地址      private Button btn;      private ImageView img;      private String url = "http://imgstore04.cdn.sogou.com/app/a/100520024/877e990117d6a7ebc68f46c5e76fc47a";        //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;                  img.setImageBitmap(bmp);                  break;              }          };      };        @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);            btn = (Button) findViewById(R.id.btn);          img = (ImageView) findViewById(R.id.img);            btn.setOnClickListener(new View.OnClickListener() {                @Override              public void onClick(View v) {                  //新建线程加载图片信息，发送到消息队列中                  new Thread(new Runnable() {                        @Override                      public void run() {                          // TODO Auto-generated method stub                          Bitmap bmp = getURLimage(url);                          Message msg = new Message();                          msg.what = 0;                          msg.obj = bmp;                          System.out.println("000");                          handle.sendMessage(msg);                      }                  }).start();              }          });      }        //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);              is.close();          } catch (Exception e) {              e.printStackTrace();          }          return bmp;      }  }