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

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    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.testApplication/com.testApplication.HomeActivity}: java.lang.NullPointerException: Attempt to write to field 'int android.support.v4.app.Fragment.mNextAnim' on a null object reference
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Root Cause Analysis

  1. java.lang.NullPointerException

    Attempt to write to field 'int android.support.v4.app.Fragment.mNextAnim' on a null object reference

    at android.support.v4.app.BackStackRecord.run()
  2. Android Support v4
    FragmentActivity.onStart
    1. android.support.v4.app.BackStackRecord.run(BackStackRecord.java:717)
    2. android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1613)
    3. android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:330)
    4. android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:547)
    4 frames
  3. Android Platform
    ActivityThread.main
    1. android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1259)
    2. android.app.Activity.performStart(Activity.java:6026)
    3. android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2302)
    4. android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2413)
    5. android.app.ActivityThread.access$800(ActivityThread.java:155)
    6. android.app.ActivityThread$H.handleMessage(ActivityThread.java:1317)
    7. android.os.Handler.dispatchMessage(Handler.java:102)
    8. android.os.Looper.loop(Looper.java:135)
    9. android.app.ActivityThread.main(ActivityThread.java:5343)
    9 frames
  4. Java RT
    Method.invoke
    1. java.lang.reflect.Method.invoke(Native Method)
    2. java.lang.reflect.Method.invoke(Method.java:372)
    2 frames
  5. Android
    ZygoteInit.main
    1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
    2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
    2 frames