问题 The support for TLS v1.2 was added in Android 4.2, but it wasn't enabled by default. This issue was quite easy to fix with OkHttp 3.x by providing a custom SSLSocketFactory implementation to the OkHttp client: OkHttpClient okHttpClient = new OkHttpClient(); okHttpClient.setSocketFactory(new MySSLSocketFactory()); In my case the custom socket factory was setting the enabled protocols like this: private static final String[] TLS_PROTOCOLS = new String[]{ "TLSv1.1", "TLSv1.2" }; public