关于android奇怪问题的ssl

我正在尝试使用ssl将文件上传到某个URL.我使用此代码设置信任管理器 -

public static void trustAll () {
    TrustManage[] trustEverythingTrustManager = new TrustManager[] {
        new X509TrustManager() {

            public void checkClientTrusted(X509Certificate[] chain,
            String authType) throws CertificateException {
            // TODO Auto-generated method stub
            }

            public void checkServerTrusted(X509Certificate[] chain,
            String authType) throws CertificateException {
            // TODO Auto-generated method stub

            }

            public X509Certificate[] getAcceptedIssuers() {
            // TODO Auto-generated method stub
            return null;
            }

        }
    };

    SSLContext sc;
    try {
        sc = SSLContext.getInstance("TLS");
        sc.init(null, trustEverythingTrustManager, new SecureRandom());
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    } catch (Exception e) {
    }
}

这一个设置主机名验证 -

public static HostnameVerifier DO_NOT_VERIFY = new HostnameVerifier() {

    public boolean verify(String hostname, SSLSession session) {
        return true;
    }
};

然后我打开这样的连接 -

URL url = new URL("some_url");
HttpURLConnection connection = null;
// check if this is https or just http
if (url.getProtocol().toLowerCase().equals("https")) {
    trustAll();
    HttpsURLConnection https = (HttpsURLConnection) url.openConnection();
    https.setHostnameVerifier(DO_NOT_VERIFY);
    connection = https;
} else {
    connection = (HttpURLConnection) url.openConnection();
}

在我获得连接后,我使用它来上传数据.我使用http一切正常但是当我尝试https时我得到以下异常 -

写入错误:系统调用期间的I/O错误,断开管道java.io.IOException:写入错误:系统调用期间的I/O错误,org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.nativewrite中的管道损坏(本机方法)org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.access $ 600(OpenSSLSocketImpl.java:55)at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl $ SSLOutputStream.write(OpenSSLSocketImpl.java:565 )java的org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnection $ HttpOutputStream.write(HttpURLConnection.java:652)中的java.io.OutputStream.write(OutputStream.java:82). io.DataOutputStream.write(DataOutputStream.java:101)

奇怪的是,我不会一直得到例外.当我尝试上传小文件(200K)它工作正常或它崩溃非常罕见,但当我尝试上传更大的(超过1MB)我几乎每次都得到异常.

有任何想法吗 ？