NPE when inflate fragment layout

[ghost]

There is an npe when android inflate layout then call method setVisible but recyclerView is null

public void setVisibility(int visibility) {  //android call this method when inflate layout
        maxVisibility = visibility;
        invalidateVisibility();
    }

    private void invalidateVisibility() {
        if(                              //just add if recyclerView != null ????
                recyclerView.getAdapter()==null ||
                recyclerView.getAdapter().getItemCount()==0 ||
                recyclerView.getChildAt(0)==null ||
                isRecyclerViewNotScrollable() ||
                maxVisibility != View.VISIBLE
                ){
            super.setVisibility(INVISIBLE);
        } else {
            super.setVisibility(VISIBLE);
        }
    }

this is my stacktrace :

E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: it.seiton.healtcare.internal.debug, PID: 16401
                  java.lang.RuntimeException: Unable to start activity ComponentInfo{it.seiton.healtcare.internal.debug/it.seiton.healtcare.ui.main.MainActivity}: android.view.InflateException: Binary XML file line #138: Attempt to invoke virtual method 'android.support.v7.widget.RecyclerView$Adapter android.support.v7.widget.RecyclerView.getAdapter()' on a null object reference
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
                      at android.app.ActivityThread.-wrap11(ActivityThread.java)
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
                      at android.os.Handler.dispatchMessage(Handler.java:102)
                      at android.os.Looper.loop(Looper.java:148)
                      at android.app.ActivityThread.main(ActivityThread.java:5417)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                   Caused by: android.view.InflateException: Binary XML file line #138: Attempt to invoke virtual method 'android.support.v7.widget.RecyclerView$Adapter android.support.v7.widget.RecyclerView.getAdapter()' on a null object reference
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
                      at it.seiton.common.ui.BaseFragment.onCreateView(BaseFragment.kt:22)
                      at android.support.v4.app.Fragment.performCreateView(Fragment.java:2080)
                      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1108)
                      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1290)
                      at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801)
                      at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1677)
                      at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:388)
                      at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:604)
                      at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:178)
                      at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1237)
                      at android.app.Activity.performStart(Activity.java:6253)
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379)
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
                      at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                      at android.os.Looper.loop(Looper.java:148) 
                      at android.app.ActivityThread.main(ActivityThread.java:5417) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
                   Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.support.v7.widget.RecyclerView$Adapter android.support.v7.widget.RecyclerView.getAdapter()' on a null object reference
                      at com.futuremind.recyclerviewfastscroll.FastScroller.invalidateVisibility(FastScroller.java:224)
                      at com.futuremind.recyclerviewfastscroll.FastScroller.setVisibility(FastScroller.java:220)
                      at android.widget.ViewAnimator.addView(ViewAnimator.java:187)
                      at android.view.ViewGroup.addView(ViewGroup.java:4117)
                      at android.view.LayoutInflater.rInflate(LayoutInflater.java:839)
                      at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
                      at android.view.LayoutInflater.rInflate(LayoutInflater.java:838)
                      at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
                      at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
                      at it.seiton.common.ui.BaseFragment.onCreateView(BaseFragment.kt:22) 
                      at android.support.v4.app.Fragment.performCreateView(Fragment.java:2080) 
                      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1108) 
                      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1290) 
                      at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:801) 
                      at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1677) 
                      at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:388) 
                      at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:604) 
                      at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:178) 
                      at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1237) 
                      at android.app.Activity.performStart(Activity.java:6253) 
                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379) 
                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
                      at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
                      at android.os.Handler.dispatchMessage(Handler.java:102) 
                      at android.os.Looper.loop(Looper.java:148) 
                      at android.app.ActivityThread.main(ActivityThread.java:5417) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

[micHar]

Can you provide your code to reproduce it? I'm not sure why the recyclerView is null at that point.