下载网络图片

 Activity  设置图片

String[] urlPathContent = host.getPicId();
try{
byte[] data = ImageService.getImage(urlPathContent[0]);
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
head.setImageBitmap(bitmap);
} catch(IOException e) {
Toast.makeText(Me.this, "网络不稳定连接超时", Toast.LENGTH_SHORT).show();
}

//ImageService.java

package com.chen.android_petlove.http;

import java.io.IOException;
import java.io.InputStream;
import java.io.StreamTokenizer;
import java.net.HttpURLConnection;
import java.net.URL;

public class ImageService {
public static byte[] getImage(String path) throws IOException{
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setReadTimeout(5000);
InputStream inputStream = conn.getInputStream();
byte[] data = StreamTool.readInputStream(inputStream);
return data;
}
}

//StreamTool.java

package com.chen.android_petlove.http;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class StreamTool {
public static byte[] readInputStream(InputStream inputStream) throws IOException{
byte[] buffer = new byte[1024];
int len = 0;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
while((len = inputStream.read(buffer)) != -1){
bos.write(buffer,0,len);
}
bos.close();
return bos.toByteArray();
}
}