新版本下载时，downloadtask.java 接收到的 count 值是-1 about appupdate HOT 3 CLOSED

{"versionCode":2,"versionName":"1.4.12","content":"1.优化功能#2.增加功能","minSupport":1,"url":"http://47.97.213.223:8080/services/download/testDownload/app.apk"}

from appupdate.

这个请求返回为-1 ，在6.0 版本里，大师有解决办法没？
string mDownLoadUrl ="http://47.97.213.223:8080/services/download/testDownload/yn.apk";
URL url = new URL(mDownLoadUrl);
connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(5000); //
connection.setReadTimeout(5000);

            connection.setRequestProperty("Connection", "Keep-Alive");

// connection.setRequestProperty("Keep-Alive", "header");
connection.setRequestMethod("GET");
connection.setRequestProperty("Accept-Encoding", "identity");

            connection.connect();

            int fileLength = connection.getContentLength();
            Log.i(TAG,"文件大小为："+fileLength+"btye");

from appupdate.

已经解决，在服务器中设置response.setContentLength(
);
String fullPath = "E:/" + id +".rmvb";
File downloadFile = new File(fullPath);
response.setContentLength((int) downloadFile.length());
客户端增加
connection.setRequestMethod("GET");
connection.setRequestProperty("Accept-Encoding", "identity");

connection.connect();

from appupdate.