java.lang.NullPointerException

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  • java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.setShowHideAnimationEnabled(boolean)' on a null object reference at fm.jiecao.jcvideoplayer_lib.JCVideoPlayer.toWindowFullscreen(JCVideoPlayer.java:556) at fm.jiecao.jcvideoplayer_lib.JCVideoPlayer.onClick(JCVideoPlayer.java:186) at fm.jiecao.jcvideoplayer_lib.JCVideoPlayerStandard.onClick(JCVideoPlayerStandard.java:165) at android.view.View.performClick(View.java:4790) at android.view.View$PerformClick.run(View.java:19933) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5569) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:931) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:726)
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