java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.google.firebase.auth.FirebaseUser.getUid()' on a null object reference

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  1. 0

    Firebase Authentication UI is too late [Android]

    Stack Overflow | 3 months ago | ─Żubomír Skirka
    java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.google.firebase.auth.FirebaseUser.getUid()' on a null object reference
  2. 0
    samebug tip
    Firebase requires your Pojo to have public getters and setters, check if you created getters and setters and if your variables are public!
  3. 0
    samebug tip
    Firebase Database considers public fields and JavaBean-like getters and setters when serializing/deserializing JSON. A public field with a getter and a setter may cause this exception. Try to change to private or removing getter and setter.
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  5. 0

    Error while using Intent Extras

    Stack Overflow | 4 months ago | Sriram R
    java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
  6. 0

    Firebase aute null object reference in android

    Stack Overflow | 5 months ago | Daniel Levi
    java.lang.NullPointerException: Attempt to invoke interface method 'void com.google.firebase.auth.FirebaseAuth$AuthStateListener.onAuthStateChanged(com.google.firebase.auth.FirebaseAuth)' on a null object reference

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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'java.lang.String com.google.firebase.auth.FirebaseUser.getUid()' on a null object reference

      at com.example.learnwords.Navigation.checkUser()
    2. com.example.learnwords
      Navigation$1.onAuthStateChanged
      1. com.example.learnwords.Navigation.checkUser(Navigation.java:247)
      2. com.example.learnwords.Navigation$1.onAuthStateChanged(Navigation.java:87)
      2 frames
    3. com.google.firebase
      FirebaseAuth$1.run
      1. com.google.firebase.auth.FirebaseAuth$1.run(Unknown Source)
      1 frame
    4. Android Platform
      ActivityThread.main
      1. android.os.Handler.handleCallback(Handler.java:746)
      2. android.os.Handler.dispatchMessage(Handler.java:95)
      3. android.os.Looper.loop(Looper.java:148)
      4. android.app.ActivityThread.main(ActivityThread.java:5443)
      4 frames
    5. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    6. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
      2 frames