FirebaseUI-Android: NullPointerException AppCompatBase.java:32

Describe your environment

Android device: motorola Nexus 6
Android OS version: 7.1.1
Google Play Services version: _____
Firebase/Play Services SDK version: 16.0.9
FirebaseUI version: 5.0.0

Describe the problem:

I’m using firebase authentication on my android app and recently I got an email regarding significant number of crashes with this stack trace: Caused by java.lang.NullPointerException: Attempt to read from field ‘int com.firebase.ui.auth.a.a.d.c’ on a null object reference at com.firebase.ui.auth.ui.AppCompatBase.onCreate + 32(AppCompatBase.java:32) at com.firebase.ui.auth.ui.email.EmailActivity.onCreate + 72(EmailActivity.java:72)

Relevant Code:

  @NonNull
  public Intent buildSignInIntent() {
      List<AuthUI.IdpConfig> selectedProviders = new ArrayList<>();
      selectedProviders.add(new AuthUI.IdpConfig.EmailBuilder().build());
      selectedProviders.add(new AuthUI.IdpConfig.FacebookBuilder().build());
      selectedProviders.add(new AuthUI.IdpConfig.GoogleBuilder().build());

      AuthUI.SignInIntentBuilder builder = AuthUI.getInstance().createSignInIntentBuilder()
              .setLogo(AuthUI.NO_LOGO)
              .setTheme(R.style.AppTheme)
              .setIsSmartLockEnabled(!BuildConfig.DEBUG /* credentials */, true /* hints */)
              .setAvailableProviders(selectedProviders)
              .enableAnonymousUsersAutoUpgrade();

      AuthMethodPickerLayout customLayout = new AuthMethodPickerLayout
              .Builder(R.layout.fragment_register)
              .setGoogleButtonId(R.id.custom_google_signin_button)
              .setEmailButtonId(R.id.custom_email_signin_button)
              .setFacebookButtonId(R.id.custom_facebook_signin_button)
              .setTosAndPrivacyPolicyId(R.id.custom_tos)
              .build();

      builder.setAuthMethodPickerLayout(customLayout);

      builder.setTosAndPrivacyPolicyUrls(Constants.TermsOfUseLink, Constants.PrivacyPolicyLink);

      return builder.build();
  }

How could I fix it? Thanks in advance.

About this issue

Original URL
State: open
Created 5 years ago
Comments: 23 (7 by maintainers)

Most upvoted comments

It worked for me. Adding below snippet, removed the NullPointerCrash. Please let me know if this is working for you as well for this issue:

added in AndroidManifest.xml

 <activity
            android:name="com.firebase.ui.auth.ui.phone.PhoneActivity"
            android:exported="false"
            android:label="PhoneAuthActivity"
            android:windowSoftInputMode="adjustResize|stateAlwaysVisible"
            tools:replace="android:label"/>

        added in styles.xml
  ```
   <style name="FirebaseUI" parent="Theme.AppCompat">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>

6vedant on Mar 18, 2023

Bump, encountering same issue

tudormot on Sep 29, 2022

java.lang.NullPointerException: Attempt to read from field ‘int com.firebase.ui.auth.data.model.FlowParameters.themeId’ on a null object reference at com.firebase.ui.auth.ui.InvisibleActivityBase.onCreate(InvisibleActivityBase.java) at com.firebase.ui.auth.KickoffActivity.onCreate(KickoffActivity.java)

Using com.firebaseui:firebase-ui-auth:8.0.0 The Crashlytics graph seems to indicate that it started reproducing after we’ve enabled email verification. It didn’t reproduce on my device with the happy flow. Also, all 37 occurrences we got so far happened on two devices, both from Huawei with Android 6 (Mate 9 lite and Y6II) Can’t some defaults be used when the FlowParameters end up null, just to prevent the crash?

robapaul88 on Sep 7, 2021

Some information from #1729:

I have Email, phone and Gmail sign-in functionality in the app. I’m not sure how to reproduce the bug but might have some idea why it happened.

While creating AuthUI instance, I don’t provide any style to the builder and one of the users somehow reached EmailLinkErrorRecoveryActivity. And in that activity, super AppCompatBase activity’s onCreate method got called which in turn set the theme by calling getFlowParams method, which tries to get FlowParameters from the intent. But since HelperActivityBase has null check while creating the intent, I believe the problem is caused by KickoffActivity’s invalidateEmailLink method.

Steps to reproduce: Call KickoffActivity’s invalidateEmailLink method without providing the theme to the AuthUI instance SignInIntent builder (this is an educated guess, I’m not sure how to call this method locally).

samtstern on Jan 31, 2020

Having a similar issue. A possible reason to why .themeId is called on null instance of FlowParameters is explained in #1729.

ranjan-malav on Jan 27, 2020