Android Question Firebase Auth error

gigi0ne

Member
Licensed User
Longtime User
Hello everybody

I have a little problem,

when I try to use the firebase authentication library
when the program arrives at auth initialization it gives me this error message and exits

java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.firebase.auth.FirebaseAuth.addAuthStateListener(com.google.firebase.auth.FirebaseAuth$AuthStateListener)' on a null object reference

what can it be
Thank you

AUTH Firebase: 
Sub Activity_Create(FirstTime As Boolean)
    If FirstTime Then
        auth.Initialize("auth")
    End If
    Activity.LoadLayout("1")
    If auth.CurrentUser.IsInitialized Then Auth_SignedIn(auth.CurrentUser)
End Sub

Sub btnSignIn_Click
    auth.SignInWithGoogle
End Sub

Sub btnSignOut_Click
    auth.SignOutFromGoogle
    lblName.Text = "Goodbye!"
End Sub

Sub Auth_SignedIn (User As FirebaseUser)
    Log("SignedIn: " & User.DisplayName)
    lblName.Text = "Hello: " & User.DisplayName
End Sub
 
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gigi0ne

Member
Licensed User
Longtime User
Thank's Manfred

B4A 11.5

Manifest: 
'This code will be applied to the manifest file during compilation.
'You do not need to modify it in most cases.
'See this link for for more information: http://www.b4x.com/forum/showthread.php?p=78136
AddManifestText(
<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="30"/>
<supports-screens android:largeScreens="true"
    android:normalScreens="true"
    android:smallScreens="true"
    android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
'End of default text.
'************ Google Play Services Base ************
AddApplicationText(
    <activity android:name="com.google.android.gms.common.api.GoogleApiActivity"
                  android:theme="@android:style/Theme.Translucent.NoTitleBar"
                  android:exported="false"/>
     <meta-data
            android:name="com.google.android.gms.version"
            android:value="@integer/google_play_services_version" />
)
'************ Google Play Services Base (end) ************

'************ Firebase Base ************
CreateResourceFromFile("google-services", "google-services.json")
AddPermission(android.permission.ACCESS_NETWORK_STATE)
AddPermission(android.permission.INTERNET)
AddPermission(android.permission.WAKE_LOCK)
AddPermission(com.google.android.c2dm.permission.RECEIVE)
AddPermission(${applicationId}.permission.C2D_MESSAGE)
AddManifestText( <permission android:name="${applicationId}.permission.C2D_MESSAGE"
        android:protectionLevel="signature" />)
AddApplicationText(
<receiver
          android:name="com.google.android.gms.measurement.AppMeasurementReceiver"
          android:enabled="true">
        <intent-filter>
          <action android:name="com.google.android.gms.measurement.UPLOAD"/>
        </intent-filter>
      </receiver>

      <service
          android:name="com.google.android.gms.measurement.AppMeasurementService"
          android:enabled="true"
          android:exported="false"/>   
    <provider
            android:authorities="${applicationId}.firebaseinitprovider"
            android:name="com.google.firebase.provider.FirebaseInitProvider"
            android:exported="false"
            android:initOrder="100" />
      <receiver
          android:name="com.google.android.gms.measurement.AppMeasurementReceiver"
          android:enabled="true">
        <intent-filter>
          <action android:name="com.google.android.gms.measurement.UPLOAD"/>
        </intent-filter>
      </receiver>

      <service
          android:name="com.google.android.gms.measurement.AppMeasurementService"
          android:enabled="true"
          android:exported="false"/>
    <receiver
            android:name="com.google.firebase.iid.FirebaseInstanceIdReceiver"
            android:exported="true"
            android:permission="com.google.android.c2dm.permission.SEND" >
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
                <action android:name="com.google.android.c2dm.intent.REGISTRATION" />
                <category android:name="${applicationId}" />
            </intent-filter>
        </receiver>
       <receiver
            android:name="com.google.firebase.iid.FirebaseInstanceIdInternalReceiver"
            android:exported="false" />

    
        <service
            android:name="com.google.firebase.iid.FirebaseInstanceIdService"
            android:exported="true">
            <intent-filter android:priority="-500">
                <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
            </intent-filter>
        </service>
)
'************ Firebase Base (end) ************
'************ Firebase Auth ************
CreateResourceFromFile(Macro, FirebaseAuth.FirebaseAuth)
AddApplicationText(
   <activity android:name="com.google.android.gms.auth.api.signin.internal.SignInHubActivity"
                  android:theme="@android:style/Theme.Translucent.NoTitleBar"
                  android:excludeFromRecents="true"
                  android:exported="false" />

        <service
            android:name="com.google.android.gms.auth.api.signin.RevocationBoundService"
            android:exported="true"
            android:permission="com.google.android.gms.auth.api.signin.permission.REVOCATION_NOTIFICATION" />
)
'************ Firebase Auth (end) ************
 
Upvote 0

DonManfred

Expert
Licensed User
Longtime User
you manifesttext is wrong. This was needed years ago like this!

Follow the Firebase-instructions carefully

Integrating Firebase Services

Google has acquired a company named Firebase and is now offering many backend services under the Firebase umbrella. Most of them are free. Integrating the services is relatively simple. 1. Use B4A Sdk Manager tool to install all recommended items. 2. Register with Firebase and create a new...
www.b4x.com
 
Upvote 1

gigi0ne

Member
Licensed User
Longtime User
perfect thanks
 
Upvote 0
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