java.lang.NullPointerException

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  • java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.support.design.widget.AppBarLayout$Behavior.setTopAndBottomOffset(int)' on a null object reference at jahirfiquitiva.apps.iconshowcase.fragments.PreviewsFragment.onResume(PreviewsFragment.java:97) at android.support.v4.app.Fragment.performResume(Fragment.java:2005) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1108) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1248) at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1230) at android.support.v4.app.FragmentManagerImpl.dispatchResume(FragmentManager.java:2052) at android.support.v4.app.FragmentController.dispatchResume(FragmentController.java:187) at android.support.v4.app.FragmentActivity.onResumeFragments(FragmentActivity.java:462) at android.support.v4.app.FragmentActivity.onPostResume(FragmentActivity.java:451) at android.support.v7.app.AppCompatActivity.onPostResume(AppCompatActivity.java:141) at android.app.Activity.performResume(Activity.java:6351) at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3136) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3178) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2525)
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