java.lang.RuntimeException: Unable to start activity ComponentInfo{my.app.debug/my.app.ui.activity.MainActivity}: java.lang.NullPointerException: Attempt to write to field 'int android.support.v4.app.Fragment.mNextAnim' on a null object reference

GitHub | alashow | 4 months ago
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  1. 0

    NPE Fragment.mNextAnim

    GitHub | 4 months ago | alashow
    java.lang.RuntimeException: Unable to start activity ComponentInfo{my.app.debug/my.app.ui.activity.MainActivity}: java.lang.NullPointerException: Attempt to write to field 'int android.support.v4.app.Fragment.mNextAnim' on a null object reference
  2. 0

    How to restore Recyclerview after rotation with onRestoreInstanteState()

    Stack Overflow | 1 year ago | CBA110
    java.lang.RuntimeException: Unable to start activity ComponentInfo{uk.co.my_package.weatherscan/uk.co.my_package.weatherscan.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.LinearLayoutManager.onRestoreInstanceState(android.os.Parcelable)' on a null object reference
  3. 0

    How do I troubleshoot an NPE when creating my activity in android?

    Stack Overflow | 2 years ago | Dennis
    java.lang.RuntimeException: Unable to start activity ComponentInfo{}: java.lang.NullPointerException: Attempt to read from field 'boolean android.support.v4.app.BackStackRecord.mAddToBackStack' on a null object reference
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  5. 0
    samebug tip
    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!
  6. 0
    samebug tip
    Also, check if you're not using android.support.v4.app.FragmentTransaction with android.app.Fragment, as they're not totally compatible.

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Root Cause Analysis

  1. java.lang.RuntimeException

    Unable to start activity ComponentInfo{my.app.debug/my.app.ui.activity.MainActivity}: java.lang.NullPointerException: Attempt to write to field 'int android.support.v4.app.Fragment.mNextAnim' on a null object reference

    at android.app.ActivityThread.performLaunchActivity()
  2. Android Platform
    ActivityThread.handleLaunchActivity
    1. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
    2. android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
    2 frames