如何在Android上正确关闭HttpURLConnection

概述我正在使用HttpURLConnection查询后端服务器.请求是POST.我的代码如下：InputStreamis=null;HttpURLConnectionconnection=null;try{connection=(HttpURLConnection)newURL(uri).openConnection();connection.setRequestMethod("POST");connection.setR

我正在使用httpURLConnection查询后端服务器.请求是POST.我的代码如下：

inputStream is = null;httpURLConnection connection = null;try {    connection = (httpURLConnection)new URL(uri).openConnection();    connection.setRequestMethod("POST");    connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded; charset=" + ENCoding);    connection.setDoOutput(true);    byte[] content = buildFormUrlEncoded(params);    connection.setRequestProperty("Content-Length", String.valueOf(content.length));    connection.connect();    OutputStream os = null;    try {        os = connection.getoutputStream();        os.write(content);    } finally {        if (os != null) { os.close(); }    }    is = connection.getinputStream();    handle(is);} finally {    if (is != null) { is.close(); }    if (connection != null) { connection.disconnect(); }}

但是我收到此StrictMode错误：

A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoIDing resource leaks.java.lang.Throwable: Explicit termination method 'close' not called    at dalvik.system.CloseGuard.open(CloseGuard.java:184)    at org.apache.harmony.xnet.provIDer.Jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:300)    at org.apache.harmony.xnet.provIDer.Jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:257)    at libcore.net.http.httpconnection.setupSecureSocket(httpconnection.java:210)    at libcore.net.http.httpsURLConnectionImpl$httpsEngine.makeSslConnection(httpsURLConnectionImpl.java:477)    at libcore.net.http.httpsURLConnectionImpl$httpsEngine.connect(httpsURLConnectionImpl.java:432)    at libcore.net.http.httpEngine.sendSocketRequest(httpEngine.java:282)    at libcore.net.http.httpEngine.sendRequest(httpEngine.java:232)    at libcore.net.http.httpURLConnectionImpl.connect(httpURLConnectionImpl.java:80)    at libcore.net.http.httpsURLConnectionImpl.connect(httpsURLConnectionImpl.java:164)

当我调试代码时,将调用os.close(),is.close()和connection.disconnect().

由于连接在池中保持活动状态,是否会发生StrictMode？

编辑

>如果connection.setRequestProperty(“ connection”,“ close”);添加StrictMode错误消失.
>如果使用http URL而不是https URL,则StrictMode错误将消失.
>如果使用BufferedReader,则StrictMode错误的发生频率会降低.

我想保持https的安全性并保持活跃以减少握手开销.

编辑2

看起来这仅在androID 3.x和4.0.x的情况下发生.

解决方法:

我的代码如下所示：

@OverrIDe    protected Boolean doInBackground(VoID... params) {        JsONObject holder = new JsONObject();        try {            Resources res = getResources();            holder.put(res.getString(R.string.str),"");            URL url = new URL(res.getString(R.string.url));            String charset = res.getString(R.string.utf);            httpURLConnection http = null;                httpsURLConnection https = (httpsURLConnection) url.openConnection();                http = https;                http.setRequestMethod(res.getString(R.string.post));                http.setDoinput(true);                http.setDoOutput(true);                http.setRequestProperty(res.getString(R.string.charset), charset);                http.setRequestProperty(res.getString(R.string.content_type), "application/x-www-form-urlencoded;charset=" + charset);                String query = String.format("query1=%s&query2=%s&query3=%s&query4=%s",                      URLEncoder.encode(res.getString(R.string.qu1), charset),                      URLEncoder.encode(res.getString(R.string.qu2), charset),                     URLEncoder.encode(res.getString(R.string.qu3), charset),                     URLEncoder.encode(holder.toString(), charset));                OutputStream output = null;                try {                     output = http.getoutputStream();                     output.write(query.getBytes(charset));                } finally {                     if (output != null) try { output.close(); } catch (IOException logorIgnore) {}                }                //inputStream response = http.getinputStream();                BufferedReader in = new BufferedReader(new inputStreamReader(http.getinputStream()),4800);                 StringBuffer responseBuffer = new StringBuffer();                String line;                while ((line = in.readline()) != null) {                     responseBuffer.append(line);                }                in.close();                answer = new Gson().fromJson(responseBuffer.toString(), Answer.class);                //s = responseBuffer.toString();        } catch (Exception e) {            e.printstacktrace();            getData();        }        return true;    }

我相信您会在那找到答案.

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