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astuetz / PagerSlidingTabStrip

An interactive indicator to navigate between the different pages of a ViewPager
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Failed while using in fragment #240

Open shaikmdashiq opened 9 years ago

shaikmdashiq commented 9 years ago

java.lang.NullPointerException: Attempt to write to field 'android.support.v4.app.FragmentManagerImpl android.support.v4.app.Fragment.mFragmentManager' on a null object reference at android.support.v4.app.BackStackRecord.doAddOp(BackStackRecord.java:417) at android.support.v4.app.BackStackRecord.add(BackStackRecord.java:412) at android.support.v4.app.FragmentPagerAdapter.instantiateItem(FragmentPagerAdapter.java:99) at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:869) at android.support.v4.view.ViewPager.populate(ViewPager.java:1019) at android.support.v4.view.ViewPager.populate(ViewPager.java:951) at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1473) at android.view.View.measure(View.java:18843) at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:728) at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:464) at android.view.View.measure(View.java:18843) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5904) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at android.view.View.measure(View.java:18843) at android.widget.LinearLayout.measureVertical(LinearLayout.java:874) at android.widget.LinearLayout.onMeasure(LinearLayout.java:612) at android.view.View.measure(View.java:18843) at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:868) at android.view.View.measure(View.java:18843) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5904) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at android.support.v7.internal.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:124) at android.view.View.measure(View.java:18843) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5904) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1435) at android.widget.LinearLayout.measureVertical(LinearLayout.java:721) at android.widget.LinearLayout.onMeasure(LinearLayout.java:612) at android.view.View.measure(View.java:18843) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5904) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at android.view.View.measure(View.java:18843) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5904) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1435) at android.widget.LinearLayout.measureVertical(LinearLayout.java:721) at android.widget.LinearLayout.onMeasure(LinearLayout.java:612) at android.view.View.measure(View.java:18843) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5904) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:3072) at android.view.View.measure(View.java:18843) at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2343) at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1379) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1623) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1264) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6943) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:777) at android.view.Choreographer.doCallbacks(Choreographer.java:590) at android.view.Choreographer.doFrame(Choreographer.java:560) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:763) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:145) at android.app.ActivityThread.main(ActivityThread.java:6837) 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:1404) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)

theBlbDan commented 9 years ago

This pretty much only signifies that you have a problem in your code, not PSTS. You'll need to provide some context, code, etc.

I see you are using FragmentPagerAdapter. I'm using FragmentStatePagerAdapter without any problems.

ka05 commented 6 years ago

If you are using inside a Fragment try using the childFragmentManager() to instantiate your pager adapter.