android用ImageView显示网络图片

1、权限配置

<</SPAN>uses-permission android:name="android.permission.INTERNET"/> 

2、 从网络获取图片

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();
}
}

3、在ImageView中显示图片

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();
}