java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference

Stack Overflow | Steven97102 | 3 months ago
  1. 0

    Firebase getValue() returns null on a existing object

    Stack Overflow | 3 months ago | Steven97102
    java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference
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    The resource was accessed after it was dismissed.
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    Initialize the variable before calling a method on it.
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    The parsed JSON does not contains the requested field.

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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference

      at earth.planet.passwordguard.Fragment1$1.onDataChange()
    2. earth.planet.passwordguard
      Fragment1$1.onDataChange
      1. earth.planet.passwordguard.Fragment1$1.onDataChange(Fragment1.java:74)
      1 frame
    3. com.google.firebase
      Query$1.onDataChange
      1. com.google.firebase.database.Query$1.onDataChange(Unknown Source)
      1 frame
    4. com.google.android
      zzaks$1.run
      1. com.google.android.gms.internal.zzajp.zza(Unknown Source)
      2. com.google.android.gms.internal.zzakp.zzcxi(Unknown Source)
      3. com.google.android.gms.internal.zzaks$1.run(Unknown Source)
      3 frames
    5. Android Platform
      ActivityThread.main
      1. android.os.Handler.handleCallback(Handler.java:739)
      2. android.os.Handler.dispatchMessage(Handler.java:95)
      3. android.os.Looper.loop(Looper.java:135)
      4. android.app.ActivityThread.main(ActivityThread.java:5290)
      4 frames
    6. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      2. java.lang.reflect.Method.invoke(Method.java:372)
      2 frames
    7. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:911)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:706)
      2 frames