Demo 随意点击 NullPointerException

[SimonRHW]

--------- beginning of crash
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.bytedance.scenedemo, PID: 27054
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.bytedance.scene.navigation.NavigationScene.remove(com.bytedance.scene.Scene)' on a null object reference
at com.bytedance.scenedemo.navigation.remove.RemoveDemoScene$1$1.run(RemoveDemoScene.java:46)
at android.os.Handler.handleCallback(Handler.java:900)
at android.os.Handler.dispatchMessage(Handler.java:103)
at android.os.Looper.loop(Looper.java:219)
at android.app.ActivityThread.main(ActivityThread.java:8349)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:513)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055)