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via Stack Overflow by Vikash Parajuli
, 1 year ago
Attempt to invoke virtual method 'android.os.Handler android.support.v4.app.FragmentHostCallback.getHandler()' on a null object reference
via Stack Overflow by user669231
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Attempt to invoke virtual method 'android.os.Handler android.support.v4.app.FragmentHostCallback.getHandler()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'android.os.Handler android.support.v4.app.FragmentHostCallback.getHandler()' on a null object reference at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:1623) at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:637) at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:166) at com.inheadline.news.view.viewpager.VerticalViewPager.setAdapter(VerticalViewPager.java:278) at com.inheadline.news.activity.MainActivity.setupViewPager(MainActivity.java:487) at com.inheadline.news.activity.MainActivity.dataAdded(MainActivity.java:557) at com.inheadline.news.db.operation.DataSnapshotToDb$AddToDb.onPostExecute(DataSnapshotToDb.java:163) at com.inheadline.news.db.operation.DataSnapshotToDb$AddToDb.onPostExecute(DataSnapshotToDb.java:138) at android.os.AsyncTask.finish(AsyncTask.java:679) at android.os.AsyncTask.access$500(AsyncTask.java:180) at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:696) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:150) at android.app.ActivityThread.main(ActivityThread.java:5546) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:684)