相关疑难解决方法(0)

我试图在android中运行以下代码

URLConnection l_connection = null;
        // Create connection
        uzip=new UnZipData(mContext);
        l_url = new URL(serverurl);

        if ("https".equals(l_url.getProtocol())) {
            System.out.println("<<<<<<<<<<<<< Before TLS >>>>>>>>>>>>");
            sslcontext = SSLContext.getInstance("TLS");
            System.out.println("<<<<<<<<<<<<< After TLS >>>>>>>>>>>>");
            sslcontext.init(null,
                    new TrustManager[] { new CustomTrustManager()},
                    new java.security.SecureRandom());
            HttpsURLConnection
                    .setDefaultHostnameVerifier(new CustomHostnameVerifier());
            HttpsURLConnection.setDefaultSSLSocketFactory(sslcontext
                    .getSocketFactory());

            l_connection = (HttpsURLConnection) l_url.openConnection();
            ((HttpsURLConnection) l_connection).setRequestMethod("POST");
        } else {
            l_connection = (HttpURLConnection) l_url.openConnection();
            ((HttpURLConnection) l_connection).setRequestMethod("POST");
        }
        /*System.setProperty("http.agent", "Android_Phone");*/


        l_connection.setConnectTimeout(10000);
        l_connection.setRequestProperty("Content-Language", "en-US");
        l_connection.setUseCaches(false);
        l_connection.setDoInput(true);
        l_connection.setDoOutput(true);
        System.out.println("<<<<<<<<<<<<< Before Connection >>>>>>>>>>>>");
        l_connection.connect();

在l_connection.connect(),它给出了这个SSLhandshakeException.有时候它有效,但大部分时间它都有例外.它只发生在Android 4.0模拟器上.我在Android 4.4和5.0上测试过,它运行正常.可能是什么原因造成的？请帮忙

堆栈跟踪

    04-28 15:51:13.143: W/System.err(2915): javax.net.ssl.SSLHandshakeException: …

按照Android中的文档SSLSocket和SSLContext,TLS v1.1和v1.2的协议API等级16+的支持,但默认不启用. http://developer.android.com/reference/javax/net/ssl/SSLSocket.html http://developer.android.com/reference/javax/net/ssl/SSLContext.html

如何在运行Android 4.1或更高版本(但低于5.0)的设备上启用它？

我已经尝试创建一个自定义的SSLSocketFactory,它可以在Socket创建时启用所有支持的协议,并在以后使用我的自定义实现:

HttpsURLConnection.setDefaultSSLSocketFactory(new MySSLSocketFactory());

public class MySSLSocketFactory extends SSLSocketFactory {

        private SSLContext sc;
        private SSLSocketFactory ssf;  

        public MySSLSocketFactory() {
            try {
                sc = SSLContext.getInstance("TLS");
                sc.init(null, null, null);
                ssf = sc.getSocketFactory();

            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            } catch (KeyManagementException e) {
                e.printStackTrace();
            }  
        }

        @Override
        public Socket createSocket(Socket s, String host, int port, boolean autoClose)
                throws IOException {
            SSLSocket ss = (SSLSocket) ssf.createSocket(s, host, port, autoClose);
            ss.setEnabledProtocols(ss.getSupportedProtocols());
            ss.setEnabledCipherSuites(ss.getSupportedCipherSuites());
            return …