HttpImage（网络请求图片）

来源：互联网发布：阿里云服务器屏蔽ip 编辑：程序博客网时间：2024/06/15 12:33

import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
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.Menu;
import android.view.MenuItem;
import android.widget.ImageView;

public class MainActivity extends Activity {

   ImageView iv;

   Handler handler = new Handler(){
       public void handleMessage(android.os.Message msg) {
           iv.setImageBitmap((Bitmap) msg.obj);
       };
   };

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

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

        //http://pic.baike.soso.com/p/20090711/20090711101754-314944703.jpg
        new Thread(new Runnable() {

           @Override
           public void run() {
               getImg();
           }
       }){}.start();
    }

   protected void getImg() {
       try {
           URL url = new URL("http://pic.baike.soso.com/p/20090711/20090711101754-314944703.jpg");
           HttpURLConnection connection = (HttpURLConnection) url.openConnection();
           //默认是get请求   如果想使用post必须指明
           connection.setRequestMethod("GET");
           connection.setReadTimeout(5000);
           connection.setConnectTimeout(5000);

           int code = connection.getResponseCode();
           if(code == 200){
               InputStream inputStream = connection.getInputStream();
               //因为该地址是一个图片的地址，所以返回的数据流就是一个图片的数据流
               //直接用该图片的数据流转换成一个Bitmap
               Bitmap bit = BitmapFactory.decodeStream(inputStream);
               //因为子线程不能更新UI 所以使用Handler完成
               Message message = Message.obtain();
               message.obj = bit;
               handler.sendMessage(message);
           }
       } catch (Exception e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }

   }

}

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