java.lang.RuntimeException

Unable to start activity ComponentInfo{noob.com.noobfilechooser/com.noob.noobfilechooser.NoobFileActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageButton.setVisibility(int)' on a null object reference

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Solutions on the web45873

  • Unable to start activity ComponentInfo{noob.com.noobfilechooser/com.noob.noobfilechooser.NoobFileActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageButton.setVisibility(int)' on a null object reference
  • via Stack Overflow by Vijay
    , 1 year ago
    Unable to start activity ComponentInfo{com.naran.whacko/com.naran.whacko.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageButton.setVisibility(int)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
  • Unable to start activity ComponentInfo{.Categories}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RelativeLayout.setVisibility(int)' on a null object reference
  • Stack trace

    • java.lang.RuntimeException: Unable to start activity ComponentInfo{noob.com.noobfilechooser/com.noob.noobfilechooser.NoobFileActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageButton.setVisibility(int)' on a null object reference at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2434) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2494) at android.app.ActivityThread.access$900(ActivityThread.java:153) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1347) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5451) 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 'void android.widget.ImageButton.setVisibility(int)' on a null object reference at com.noob.noobfilechooser.fragments.NoobFileFragment.turnOnMultiSelectMode(NoobFileFragment.java:177) at com.noob.noobfilechooser.fragments.NoobFileFragment.initializeRecyclerView(NoobFileFragment.java:84) at com.noob.noobfilechooser.fragments.NoobFileFragment.onSetupView(NoobFileFragment.java:70) at com.noob.noobfilechooser.fragments.BaseFragment.onCreateView(BaseFragment.java:24) 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:1238) at android.app.Activity.performStart(Activity.java:6340) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2397) ... 9 more

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