java.lang.NullPointerException Attempt to invoke interface method 'boolean java.util.List.contains(java.lang.Object)' on a null object reference hg.zp.ui.ui.activity.WelcomeActivity.onDestroy(WelcomeActivity.java:108)

[baigao2015]

 java.lang.NullPointerException
 Attempt to invoke interface method 'boolean java.util.List.contains(java.lang.Object)' on a null object reference
 hg.zp.ui.ui.activity.WelcomeActivity.onDestroy(WelcomeActivity.java:108)
 .......
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1055)
 Caused by: java.lang.NullPointerException: Attempt to invoke interface method 'boolean      java.util.List.contains(java.lang.Object)' on a null object reference
 	at com.aitangba.swipeback.ActivityLifecycleHelper.onActivityDestroyed(ActivityLifecycleHelper.java:64)
at android.app.Application.dispatchActivityDestroyed(Application.java:569)
at android.app.Activity.dispatchActivityDestroyed(Activity.java:1446)
at android.app.Activity.onDestroy(Activity.java:2660)

.............