NullPointerException: Attempt to invoke virtual method 'android.support.v4.app.FragmentManager android.support.v4.app.FragmentActivity.getSupportFragmentManager()' on a null object

[j2emanue]

if you have a very poor network connection then try to call the following code from a fragment:

`private void ititFireBaseUi() {

    AuthUI.getInstance()
            .signOut(getActivity())
            .addOnCompleteListener(new OnCompleteListener<Void>() {
                public void onComplete(@NonNull Task<Void> task) {
                    // Choose authentication providers
                    List<AuthUI.IdpConfig> providers = Arrays.asList(
                            new AuthUI.IdpConfig.Builder(AuthUI.EMAIL_PROVIDER).build(),
                            new AuthUI.IdpConfig.Builder(AuthUI.PHONE_VERIFICATION_PROVIDER).build(),
                            new AuthUI.IdpConfig.Builder(AuthUI.GOOGLE_PROVIDER).build(),
                            new AuthUI.IdpConfig.Builder(AuthUI.FACEBOOK_PROVIDER).build());
                    //new AuthUI.IdpConfig.Builder(AuthUI.TWITTER_PROVIDER).build());

// Create and launch sign-in intent
startActivityForResult(
AuthUI.getInstance()
.createSignInIntentBuilder()
.setAvailableProviders(providers)
.setLogo(R.drawable.myapp_logo)
.build(),
RC_SIGN_IN);
}
});

}

`
i get the following error and the application crashes:

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mobile.myapp.labs, PID: 7684
java.lang.NullPointerException: Attempt to invoke virtual method 'android.support.v4.app.FragmentManager android.support.v4.app.FragmentActivity.getSupportFragmentManager()' on a null object reference
at com.firebase.ui.auth.util.signincontainer.IdpSignInContainer.signIn(IdpSignInContainer.java:61)
at com.firebase.ui.auth.util.signincontainer.SignInDelegate.redirectToIdpSignIn(SignInDelegate.java:384)
at com.firebase.ui.auth.util.signincontainer.SignInDelegate.handleCredential(SignInDelegate.java:264)
at com.firebase.ui.auth.util.signincontainer.SignInDelegate.onComplete(SignInDelegate.java:164)
at com.google.android.gms.tasks.zzf.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

[SUPERCILEX]

Yep, duplicate of #1181. The next release will include a fix if all goes well.