No such method error setEndpointIdentificationAlgorithm

Introduction

Even though Android is not our main focus, we still try to be as compatible as possible with our Android user base.

For our release 1.5.0 we had to update to Java API Version 1.7.

Problem

Starting with release 1.5.0 we are using the method SSLParameters.setEndpointIdentificationAlgorithm to improve security and perform hostname validation out of the box.

This API was introduced to Android with API level 24.

If you are using this library with a lower API Level you will run into the following exception:

Fatal Exception: java.lang.NoSuchMethodError: No virtual method setEndpointIdentificationAlgorithm(Ljava/lang/String;)V in class Ljavax/net/ssl/SSLParameters; or its super classes (declaration of 'javax.net.ssl.SSLParameters' appears in /system/framework/core-libart.jar)
at org.java_websocket.client.WebSocketClient.run(WebSocketClient.java:476)
at java.lang.Thread.run(Thread.java:831)

Workaround

If you want to target Android API lower 24, you should do the following:

• Override protected void onSetSSLParameters(SSLParameters sslParameters) to not call setEndpointIdentificationAlgorithm()
• Perform the hostname validation after you connected to the server (check out this example code)