<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" ><TextViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:text="@string/imagepath" /><EditTextandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:text="http://10.191.92.7:8080/web/xiaoxiao.jpg"android:id="@+id/imagepath"/><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/button"android:id="@+id/button"/><ImageView android:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/imageView"/></LinearLayout>

package ygc.yxb.image;import ygc.yxb.service.ImageService;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;public class MainActivity extends Activity {private EditText pathText;private ImageView imageView;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);//获得图片路径pathText=(EditText) this.findViewById(R.id.imagepath);//获得要显示的imageViewimageView=(ImageView) this.findViewById(R.id.imageView);//获得button按钮 Button button=(Button) this.findViewById(R.id.button);//注册button按钮的点击事件button.setOnClickListener(new ButtonClickListener());}private final class ButtonClickListener implements View.OnClickListener{@Overridepublic void onClick(View v) {String path=pathText.getText().toString();try {//业务逻辑层：ImageService类的getImage方法用以获取网络图片byte[] data = ImageService.getImage(path);//用字节数组所有信息生成位图对象Bitmap bitmap =BitmapFactory.decodeByteArray(data, 0, data.length);imageView.setImageBitmap(bitmap);//显示图片} catch (Exception e) {e.printStackTrace();Toast.makeText(getApplicationContext(), R.string.error, 1).show();}}}
}

package ygc.yxb.service;import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;import ygc.yxb.utils.StreamTool;public class ImageService {/*** 获取网络图片的数据* @param path 网络图片路径* @return*/public static byte[] getImage(String path) throws Exception {URL url = new URL(path);HttpURLConnection conn=(HttpURLConnection)url.openConnection();    //基于HTTP协议的连接对象conn.setConnectTimeout(5000);//5秒conn.setRequestMethod("GET");//请求方式//判断请求是否成功if(conn.getResponseCode()==200){//定义输入流InputStream inStream = conn.getInputStream();return StreamTool.read(inStream);}return null;}}

package ygc.yxb.utils;import java.io.ByteArrayOutputStream;
import java.io.InputStream;public class StreamTool {/*** 读取流中的数据* @param inStream* @return* @throws Exception*/public static byte[] read(InputStream inStream) throws Exception {ByteArrayOutputStream outputStream = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len = 0;//如果字节流中的数据不等于-1，就说明一直有，然后循环读出while( (len=inStream.read(buffer)) !=-1){//将读出的数据放入内存中
            outputStream.write(buffer);}inStream.close();return outputStream.toByteArray();}}