用Handler进行网络取图片

1、新建一个XML和一个Imgview，用来点击获取和显示图片

<span style="font-size:18px;"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
 >

    <ImageView
        android:id="@+id/imgview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"</span>

2,、新建一个Activty继承Activty

<span style="font-size:18px;">package com.example.com.scxh.netimgw.wangqu;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.sql.Connection;

import android.app.Activity;
import android.database.CursorJoiner.Result;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {
  
  private static final String httpUrls = "http://www.jimeise.net/wp-content/uploads/2014/05/IMGP6150.jpg";
  private ImageView mImageView, ImageView2;
  private Button mButton, mButton2;
  Bitmap bitmap = null;
  HttpURLConnection connect = null;
  InputStream is = null;
  private Handler mHandler = new Handler() {
    public void handleMessage(android.os.Message msg) {
      Bitmap bitmap = (Bitmap) msg.obj;
      mImageView.setImageBitmap(bitmap);
    };
  };

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mImageView = (ImageView) findViewById(R.id.imgview);
    mButton = (Button) findViewById(R.id.butn);
    mButton2 = (Button) findViewById(R.id.butns);
    ImageView2 = (ImageView) findViewById(R.id.imgviews);
    //用Handler进行网络取图片
//    mButton.setOnClickListener(new OnClickListener() {

      
//      public void onClick(View v) {
//        new Thread() {
//          public void run() {
//            URL url;
//            try {
//              url = new URL(httpUrls);
//              HttpURLConnection connect = (HttpURLConnection) url
//                  .openConnection();
    
//              InputStream is = connect.getInputStream();
//              Bitmap bitmap = BitmapFactory.decodeStream(is);
//
//              Message msg = Message.obtain();
//              msg.obj = bitmap;
//              mHandler.sendMessage(msg);
//            } catch (MalformedURLException e) {
//              e.printStackTrace();
//            } catch (IOException e) {
//              e.printStackTrace();
//            } finally {
//              if (is != null) {
//                try {
//                  is.close();
//                  if (connect != null) {
//                    connect.disconnect();
//                  }
//                } catch (IOException e) {
//
//                  e.printStackTrace();
//                }
//              }
//            }
//          }
//
//        }.start();
//
//      }
//    });
    </span>

这样就实现了网络取图片