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crosswall / Android-Coverflow

A beautiful coverflow lib for android
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Get NullPointerException #10

Open KingWu opened 8 years ago

KingWu commented 8 years ago

First of all, i initialize an empty list. After call web service, update the list and call notifyDataSetChanged.

Then drag to the third Fragment, will get this issue.

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setElevation(float)' on a null object reference at android.support.v4.view.ViewCompatLollipop.setElevation(ViewCompatLollipop.java:45) at android.support.v4.view.ViewCompat$LollipopViewCompatImpl.setElevation(ViewCompat.java:1538) at android.support.v4.view.ViewCompat.setElevation(ViewCompat.java:2713) at me.crosswall.lib.coverflow.core.PagerContainer.onPageSelected(PagerContainer.java:126) at android.support.v4.view.ViewPager.dispatchOnPageSelected(ViewPager.java:1867) at android.support.v4.view.ViewPager.scrollToItem(ViewPager.java:625) at android.support.v4.view.ViewPager.setCurrentItemInternal(ViewPager.java:609) at android.support.v4.view.ViewPager.onTouchEvent(ViewPager.java:2181)

akshuu commented 8 years ago

Same here. I am also getting the same error.

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setElevation(float)' on a null object reference at android.support.v4.view.ViewCompatLollipop.setElevation(ViewCompatLollipop.java:45) at android.support.v4.view.ViewCompat$LollipopViewCompatImpl.setElevation(ViewCompat.java:1599) at android.support.v4.view.ViewCompat.setElevation(ViewCompat.java:2808) at com.grp10.codepath.travelmemo.activities.TripActivity$5.run(TripActivity.java:275) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:7224) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

vincent-paing commented 8 years ago

I think this might be due to the fact that View is taking a while to draw. Can I know if the layout are resource heavy?

westito commented 8 years ago

+1

westito commented 8 years ago

Setting ViewPager offscreenPageLimit = pageCount solves the problem.

BongJaeChoi commented 7 years ago

+1 @westito it is not real solution.

zokirbekov commented 5 years ago

Did anyone find solution ?