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Sometime application having crash issue and my crash log show me Error like this : 

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.support.v4.util.SparseArrayCompat.size()' on a null object reference
       at android.support.v4.app.FragmentActivity.onSaveInstanceState(FragmentActivity.java:570)
       at android.support.v7.app.AppCompatActivity.onSaveInstanceState(AppCompatActivity.java:480)
       at android.app.Activity.performSaveInstanceState(Activity.java:1495)
       at android.app.Instrumentation.callActivityOnSaveInstanceState(Instrumentation.java:1316)
       at android.app.ActivityThread.callCallActivityOnSaveInstanceState(ActivityThread.java:5194)
       at android.app.ActivityThread.performStopActivityInner(ActivityThread.java:4519)
       at android.app.ActivityThread.handleStopActivity(ActivityThread.java:4582)
       at android.app.ActivityThread.access$1300(ActivityThread.java:218)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1747)
       at android.os.Handler.dispatchMessage(Handler.java:102)
       at android.os.Looper.loop(Looper.java:145)
       at android.app.ActivityThread.main(ActivityThread.java:6917)
       at java.lang.reflect.Method.invoke(Method.java)
       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)

how to fix this error??

please help me thanks in advance.

Ravi Makvana
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2 Answers2

0

Seems like you are trying to get size() of an array object without null check on the object. set a null check to avoid this exception. 

    if(array != null ){
      int size = array.size();
    }
rajeswari ratala
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0

I think not getting the array size where u try to transfer the data or mismatch the type. Your mapping of object is not correct. Plz check your mapping again.