FirestoreRecyclerAdapter no virtual method getDocument

[jvergers]

I am currently converting my Firebase UI components to Firestore UI components. When building the FirestoreRecyclerAdapter and manually call the adapter.startListening() or initialize it via new FirestoreRecyclerOptions.Builder().setLifeCycleOwner() I stumble on the following fatal exception.

FATAL EXCEPTION: main
Process: packagename, PID: 3129
java.lang.NoSuchMethodError: No virtual method getDocument()Lcom/google/firebase/firestore/DocumentSnapshot; in class Lcom/google/firebase/firestore/DocumentChange; or its super classes (declaration of 'com.google.firebase.firestore.DocumentChange' appears in /data/app/packagename-yHh4aIRPAZwxxRYgunJivQ==/split_lib_dependencies_apk.apk)
at com.firebase.ui.firestore.FirestoreArray.onDocumentAdded(FirestoreArray.java:98)
at com.firebase.ui.firestore.FirestoreArray.onEvent(FirestoreArray.java:83)
at com.firebase.ui.firestore.FirestoreArray.onEvent(FirestoreArray.java:21)
at com.google.firebase.firestore.zzi.onEvent(Unknown Source:17)
at com.google.android.gms.internal.zzeyn.zza(Unknown Source:6)
at com.google.android.gms.internal.zzeyo.run(Unknown Source:6)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6809)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

The error states that the class DocumentSnapshot doesn't contain a method getDocument which after checking is correct. However this is also how the docs states this implementation.

The adapter with query

mRecyclerView = (RecyclerView) view;
            mRecyclerView.setLayoutManager(new LinearLayoutManager(context));

            Query query = mFirestore.collection("spots");
            FirestoreRecyclerOptions<SpotModel> options = new FirestoreRecyclerOptions.Builder<SpotModel>().setQuery(query, SpotModel.class).setLifecycleOwner(this).build();

            mAdapter = new FirestoreRecyclerAdapter<SpotModel, SpotHolder>(options) {
                @Override
                public SpotHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.card_spot, parent, false);

                    return new SpotHolder(view);
                }

                @Override
                protected void onBindViewHolder(@NonNull SpotHolder holder, int position, @NonNull SpotModel model) {
                    holder.bind(model);
                }
            };

            mRecyclerView.setAdapter(mAdapter);

FirebaseUI dependencies

implementation 'com.firebaseui:firebase-ui-auth:3.2.2'
implementation 'com.firebaseui:firebase-ui-database:3.2.2'
implementation 'com.firebaseui:firebase-ui-firestore:3.2.2'

The adapter is being initialized in the onCreateView method of a fragment.

[SUPERCILEX]

Could post the output of ./gradlew dependencies?

[jvergers]

Full output:

Configure project :app
Could not find google-services.json while looking in [src/nullnull/debug, src/debug/nullnull, src/nullnull, src/debug, src/nullnullDebug]
registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)
Could not find google-services.json while looking in [src/nullnull/release, src/release/nullnull, src/nullnull, src/release, src/nullnullRelease]
registerResGeneratingTask is deprecated, use registerGeneratedFolders(FileCollection)

Task :dependencies

---

Root project

No configurations

BUILD SUCCESSFUL in 2s
1 actionable task: 1 executed

Double checked if google-services.json is missing but it's placed in the projects app folder.

[SUPERCILEX]

Oh, my B. Could you run ./gradlew app:dependencies? Thanks!

[jvergers]

Attached in textfile since its a pretty big output.

gradeOutput.txt

[SUPERCILEX]

Huh, your dependencies look good to me. Are you using multidex?

[jvergers]

Multidex is not enabled.

[samtstern]

@jvergers thank you for this report, I got someone who mentioned this to me directly via email so it appears this is a real issue.

With the other report, it seems the problem comes from mixing Firebase dependencies 12.0.0 and FirebaseUI 3.2.2. You can solve this temporarily by downgrading to 11.8.0. We have a version 12.0.1 coming out in the next few days to fix some packaging issues with 12.0.0 that I hope will resolve this.

[samtstern]

The more I look at it, I also think this could be related to the newly added QueryDocumentSnapshot class in 12.0.0 which is meant to use the type system to signal to the developer that .exists() will always be true for DocumentSnapshot returned from a QuerySnapshot whereas that's not the case if you just call get() on a random DocumentReference

[jvergers]

Downgrading Firebase to 11.8.0 worked as a temporarily work around, will keep an eye on the update. Thanks a million!

[samtstern]

@jvergers I have #1216 to double-fix this issue :-)

I also suspect this is just due to some gradle build caching not being happy when you upgraded from 11.8.0 to 12.0.0, but it should be fixed in a few days either way.

[PankajSavaliya]

This issue generated by proguard-rules. need to proguard-rules for that issue.

[samtstern]

This issue has been fixed and released in 3.3.0.