package cn.jgw.service;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

import cn.jgw.utils.StreamTool;

public class ImageService {

    public static byte[] getImage(String path) throws Exception{

        URL url = new URL(path);

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();//基于HTTP协议连接对象

        conn.setConnectTimeout(5000);

        conn.setRequestMethod("GET");

        if(conn.getResponseCode() == 200){

            InputStream inStream = conn.getInputStream();

            return StreamTool.read(inStream);

        }

        return null;

    }

}

package cn.jgw.utils;

import java.io.ByteArrayOutputStream;

import java.io.InputStream;

public class StreamTool {

public static byte[] read(InputStream inStream) throws Exception{

ByteArrayOutputStream outStream = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int len = 0;

while( (len = inStream.read(buffer)) != -1){

outStream.write(buffer, 0, len);

}

inStream.close();

return outStream.toByteArray();

}

}

try{

                byte[] data = ImageService.getImage(path);

                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();

}