android socketio http请求时正常，https请求报错

android socketio http请求时正常，https请求报错：
io.socket.SocketIOException: Error while handshaking
at io.socket.IOConnection.handshake(IOConnection.java:322)
at io.socket.IOConnection.access$600(IOConnection.java:39)
at io.socket.IOConnection$ConnectThread.run(IOConnection.java:199)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'javax.net.ssl.SSLSocketFactory javax.net.ssl.SSLContext.getSocketFactory()' on a null object reference
at io.socket.IOConnection.handshake(IOConnection.java:301)
... 2 more

a null object reference一个空对象的引用，是不是没有初始化啊？

空指针，将涉及网络部分的代码的对象多看看，不行就多打几个点，debug一下，很快就会找到。