<!--访问网络的权限--> 
<uses-permission android:name="android.permission.INTERNET"/> 

/** 
   * 获取网络图片的数据 
   * @param path 网络图片路径 
   * @return 
   * @throws Exception 
   */ 
  public static byte[] getImage(String path) throws Exception { 
    URL url=new URL(path); 
    HttpURLConnection conn=(HttpURLConnection)url.openConnection();//得到基于HTTP协议的连接对象 
    conn.setConnectTimeout(5000);//设置超时时间 
    conn.setRequestMethod("GET");//请求方式 
    if(conn.getResponseCode()==200){//判断是否请求成功 
      InputStream inputStream=conn.getInputStream(); 
      return read(inputStream); 
    } 
    return null; 
  } 
  /** 
   * 读取流中的数据 
   */ 
  public static byte[] read(InputStream inputStream) throws IOException { 
    ByteArrayOutputStream outputStream=new ByteArrayOutputStream(); 
    byte[] b=new byte[1024]; 
    int len=0; 
    while((len=inputStream.read(b))!=-1){ 
      outputStream.write(b); 
    } 
    inputStream.close(); 
    return outputStream.toByteArray(); 
  } 

public class NetimageActivity extends Activity { 
  private EditText pathText; 
  private ImageView imageView; 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
     
    pathText=(EditText)this.findViewById(R.id.imagepath);//图片路径 
    imageView=(ImageView)this.findViewById(R.id.imageView);//显示图片控件 
    Button button=(Button)this.findViewById(R.id.button);//查看图片按钮 
    button.setOnClickListener(new ButtonClickListener());//注册查看图片按钮事件 
  } 
  /** 
   * 处理查看图片按钮事件 
   */ 
  private final class ButtonClickListener implements View.OnClickListener{ 
    @Override 
    public void onClick(View v) { 
      //取得图片路径 
      String path=pathText.getText().toString(); 
      try { 
        //获取图片数据 
        byte[] data=ImageService.getImage(path); 
        //使用数组的所有数据构建位图对象 
        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(); 
      } 
    } 
  } 
}