从javaweb获取一张图片的数据流，方法如下：
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
PrintWriter writer = response.getWriter();
InputStream inputStream = this.getServletContext().getResourceAsStream("/WEB-INF/pics/4.jpg");
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String str;
while((str=bufferedReader.readLine())!=null){
writer.write(str);
System.out.println("str="+str);
}
writer.flush();
writer.close();
然后android客户端获取此数据流，
public static ByteArrayOutputStream readParse(String urlPath) throws Exception {
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] data = new byte[1024];
int len = 0;
URL url = new URL(urlPath);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
Log.i("xin", "conn="+conn);
InputStream inStream = conn.getInputStream();
while ((len = inStream.read(data)) != -1) {
outStream.write(data, 0, len);
}
inStream.close();
return outStream;
}
然后调用上面的方法：
ByteArrayOutputStream readParse = readParse(urlPath);
byte[] byteArray = readParse.toByteArray();
Bitmap bitmap = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
却获得bitmap 为null，经验证从服务器端获取到了数据，byteArray 不为空。
求大神指点一下