Android——获取网络图片

布局

<RelativeLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.basillee.asus.demo.MainActivity3">

<ImageView
    android:id="@+id/imageView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
></ImageView>
</RelativeLayout>

后台代码

package com.basillee.asus.demo;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.widget.ImageView;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;


public class MainActivity3 extends ActionBarActivity {

    private ImageView imageView=null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_activity3);
        imageView= (ImageView) findViewById(R.id.imageView);
        new Thread(new Runnable() {
            @Override
            public void run() {
                final Bitmap bitmap=getPicture("http://h.hiphotos.baidu.com/news/q%3D100/sign=be8e90f30cfa513d57aa68de0d6d554c/c75c10385343fbf29d10a30cb47eca8065388fe4.jpg");
                try {
                    Thread.sleep(2000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                imageView.post(new Runnable() {
                    @Override
                    public void run() {
                        imageView.setImageBitmap(bitmap);
                    }
                });
            }
        }).start();
    }

    public Bitmap getPicture(String path){
        Bitmap bm=null;
        try{
            URL url=new URL(path);
            URLConnection connection=url.openConnection();
            connection.connect();
            InputStream inputStream=connection.getInputStream();
            bm= BitmapFactory.decodeStream(inputStream);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return  bm;
    }
}

更多介绍请看android系列经验： http://jingyan.baidu.com/article/48b558e3372fae7f38c09a1d.html