java.lang.NullPointerException

Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference

Samebug tips2

Check if you imported android.support.v4.app.FragmentManager and not android.app.FragmentManager. Check for naming problems in your xml files as well, might have inconsistencies!

Also, check if you're not using android.support.v4.app.FragmentTransaction with android.app.Fragment, as they're not totally compatible.

Don't give up yet. Our experts can help. Paste your full stack trace to get a solution.

Solutions on the web21068

  • via GitHub by akarnokd
    , 1 year ago
    Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference
  • via GitHub by sczerwinski
    , 1 year ago
    Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference
  • via GitHub by strubelz
    , 8 months ago
    Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference
  • Stack trace

    • java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Class java.lang.Object.getClass()' on a null object reference at android.support.v4.app.BackStackRecord.doAddOp(BackStackRecord.java:431) at android.support.v4.app.BackStackRecord.replace(BackStackRecord.java:481) at android.support.v4.app.BackStackRecord.replace(BackStackRecord.java:472) at com.ikurek.pwr.MainActivity.onNavigationItemSelected(MainActivity.java:145) at android.support.design.widget.NavigationView$1.onMenuItemSelected(NavigationView.java:153) at android.support.v7.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:810) at android.support.v7.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:152) at android.support.v7.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:957) at android.support.design.internal.NavigationMenuPresenter$1.onClick(NavigationMenuPresenter.java:328) at android.view.View.performClick(View.java:4780) at android.view.View$PerformClick.run(View.java:19866) 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:5254) 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:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

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