Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via Stack Overflow by Lukas Rasmus Nielsen
, 1 year ago
Attempt to invoke virtual method 'void android.widget.GridView.setAdapter(android.widget.ListAdapter)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.GridView.setAdapter(android.widget.ListAdapter)' on a null object reference	at tryouts.demoapplication.recFragment.onAttach(recipesFragment.java:42)	at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1019)	at android.support.v4.app.BackStackRecord.ensureFragmentsAreInitialized(BackStackRecord.java:1077)	at android.support.v4.app.BackStackRecord.beginTransition(BackStackRecord.java:1032)	at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:658)	at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1617)	at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:570)	at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)	at android.support.v4.view.ViewPager.populate(ViewPager.java:1177)	at android.support.v4.view.ViewPager.populate(ViewPager.java:1025)	at android.support.v4.view.ViewPager$3.run(ViewPager.java:254)	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)	at android.view.Choreographer.doCallbacks(Choreographer.java:670)	at android.view.Choreographer.doFrame(Choreographer.java:603)	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:148)	at android.app.ActivityThread.main(ActivityThread.java:5417)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)