在三星S4上带有自签名证书的https请求失败

Question

我尝试在我的Android应用中执行HTTPS POST请求。首先，我尝试使用通用的okHttp客户端发出请求，并收到SSLHandshakeException。为了防止这种情况，我开始使用带有以下代码的自签名证书：

public class SelfSignedTrustManager implements X509TrustManager {
    @Override
    public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
    }

    @Override
    public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
    }

    @Override
    public java.security.cert.X509Certificate[] getAcceptedIssuers() {
        return new java.security.cert.X509Certificate[]{};
    }
}

public static void setUnsafeHttpsSettings(OkHttpClient.Builder builder) {
        try {
            // Create a trust manager that does not validate certificate chains
            final TrustManager[] trustAllCerts = new SelfSignedTrustManager[] {
                    new SelfSignedTrustManager()
            };

            // Install the all-trusting trust manager
            final SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, trustAllCerts, new java.security.SecureRandom());

            // Create an ssl socket factory with our all-trusting manager
            final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();

            builder.sslSocketFactory(sslSocketFactory, (X509TrustManager)trustAllCerts[0]);
            builder.hostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }


class ApiClass {
    private val httpClient: OkHttpClient

        constructor() {
            val builder = OkHttpClient().newBuilder()
            Utils.setUnsafeHttpsSettings(builder)
            httpClient = builder.build()
        }

    fun post(url: String): ResponseBody? {
            val request = Request.Builder()
                    .url(url)
                    .build()
            val response = httpClient.newCall(request).execute()
            return response.body()
        }
}

private class FetchAsyncTask : AsyncTask<Void, Void, String>() {
    override fun doInBackground(vararg params: Void): String? {
        try {
            val result = ApiClass()
                    .post(url)
            return result?.string()
        } catch (ioe: Exception) {
            ioe.printStackTrace()
        }
        return null
    }

    override fun onPostExecute(result: String?) {
        Log.i(TAG, "Fetched contents of URL: $result")
    }
}

除三星s4（Android版本-5.0.1）外，所有智能手机均可完美兼容。使用它我得到一个错误：

06-29 17:53:18.066 20818-20848/com.example.yashchenkovv.testingurlsamsung W/System.err:     at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:121)
        at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:200)
        at okhttp3.RealCall.execute(RealCall.java:77)
        at com.example.yashchenkovv.testingurlsamsung.ApiClass.post(MainActivity.kt:68)
        at com.example.yashchenkovv.testingurlsamsung.FetchAsyncTask.doInBackground(MainActivity.kt:34)
        at com.example.yashchenkovv.testingurlsamsung.FetchAsyncTask.doInBackground(MainActivity.kt:29)
        at android.os.AsyncTask$2.call(AsyncTask.java:288)
        at java.util.concurrent.FutureTask.run(FutureTask.java:237)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)

有什么想法为什么不起作用？