java.lang.NullPointerException: Attempt to invoke virtual method 'android.support.v4.app.FragmentManager android.support.v4.app.FragmentActivity.getSupportFragmentManager()' on a null object reference then the application crushs java.lang.NullPointerException: Attempt to invoke virtual method 'android.support.v4.app.FragmentManager android.support.v4.app.FragmentActivity.getSupportFragmentManager()' on a null object reference

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 almsry
, 9 months ago
Attempt to invoke virtual method 'android.support.v4.app.FragmentManager android.support.v4.app.FragmentActivity.getSupportFragmentManager()' on a null object reference then the application crushs java.lang.NullPointerException: Attempt to invoke
java.lang.NullPointerException: Attempt to invoke virtual method 'android.support.v4.app.FragmentManager android.support.v4.app.FragmentActivity.getSupportFragmentManager()' on a null object reference then the application crushs java.lang.NullPointerException: Attempt to invoke virtual method 'android.support.v4.app.FragmentManager android.support.v4.app.FragmentActivity.getSupportFragmentManager()' on a null object reference
at com.teqneia.blooddonation.BasicInfoFragment.doBack(BasicInfoFragment.java:245)
at com.teqneia.blooddonation.MainActivity.onBackPressed(MainActivity.java:258)
at android.app.Activity.onKeyUp(Activity.java:2530)
at android.view.KeyEvent.dispatch(KeyEvent.java:2726)
at android.support.v7.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:543)
at android.support.v7.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:53)
at android.support.v7.app.AppCompatDelegateImplBase$AppCompatWindowCallbackBase.dispatchKeyEvent(AppCompatDelegateImplBase.java:315)
at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:4333)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4295)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3836)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3889)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3855)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3981)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3863)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4038)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3836)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3889)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3855)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3863)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3836)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3889)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3855)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4014)
at android.view.ViewRootImpl$ImeInputStage.onFinishedInputEvent(ViewRootImpl.java:4175)
at android.view.inputmethod.InputMethodManager$PendingEvent.run(InputMethodManager.java:2378)
at android.view.inputmethod.InputMethodManager.invokeFinishedInputEventCallback(InputMethodManager.java:1999)
at android.view.inputmethod.InputMethodManager.finishedInputEvent(InputMethodManager.java:1990)
at android.view.inputmethod.InputMethodManager$ImeInputEventSender.onInputEventFinished(InputMethodManager.java:2355)
at android.view.InputEventSender.dispatchInputEventFinished(InputEventSender.java:141)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:330)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5546)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)

Users with the same issue

You are the first who have seen this exception. Write a tip to help other users and build your expert profile.

Know the solutions? Share your knowledge to help other developers to debug faster.