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I am trying to recover 6 months old app but I can't build it.

This is a react-native app for Android/iOS. I am using "Android Studio" to build this app.

I can't build the app because it fails to compile:

Compilation failed; see the compiler error output for details.

Compiler errors:

error: cannot find symbol class DocumentListenOptions

error: cannot find symbol class QueryListenOptions

error: cannot find symbol method getDownloadUrl()

Code from error:

import com.facebook.react.bridge.Arguments;
import com.facebook.react.bridge.Promise;
import com.facebook.react.bridge.ReactContext;
import com.facebook.react.bridge.ReadableArray;
import com.facebook.react.bridge.ReadableMap;
import com.facebook.react.bridge.WritableMap;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.firestore.DocumentListenOptions;
import com.google.firebase.firestore.EventListener;
import com.google.firebase.firestore.FieldPath;
import com.google.firebase.firestore.FirebaseFirestore;
import com.google.firebase.firestore.FirebaseFirestoreException;
import com.google.firebase.firestore.ListenerRegistration;
import com.google.firebase.firestore.Query;
import com.google.firebase.firestore.QueryListenOptions;
import com.google.firebase.firestore.QuerySnapshot;

public void onSnapshot(final String listenerId, final ReadableMap queryListenOptions) 
if (!collectionSnapshotListeners.containsKey(listenerId)) 
 final EventListener<QuerySnapshot> listener = new EventListener<QuerySnapshot>() 
 @Override
 public void onEvent(QuerySnapshot querySnapshot, FirebaseFirestoreException exception) 
 if (exception == null) 
 handleQuerySnapshotEvent(listenerId, querySnapshot);
 else 
 ListenerRegistration listenerRegistration = collectionSnapshotListeners.remove(listenerId);
 if (listenerRegistration != null) 
 listenerRegistration.remove();
 
 handleQuerySnapshotError(listenerId, exception);
 
 
 ;
 QueryListenOptions options = new QueryListenOptions();
 if (queryListenOptions != null) 
 if (queryListenOptions.hasKey("includeDocumentMetadataChanges")
 && queryListenOptions.getBoolean("includeDocumentMetadataChanges")) 
 options.includeDocumentMetadataChanges();
 
 if (queryListenOptions.hasKey("includeQueryMetadataChanges")
 && queryListenOptions.getBoolean("includeQueryMetadataChanges")) 
 options.includeQueryMetadataChanges();
 
 

 ListenerRegistration listenerRegistration = this.query.addSnapshotListener(options, listener);
 collectionSnapshotListeners.put(listenerId, listenerRegistration);
 

"not a full code, just the place I get an error from"

So it:

• cannot resolve symbol "QueryListenOptions"




• cannot resolve method "includeDocumentMetadataChanges"




• cannot resolve method "addSnapshotListener(options, listener)"

And for this error:

cannot find symbol method getDownloadUrl()

private WritableMap getUploadTaskAsMap(UploadTask.TaskSnapshot taskSnapshot) 
 WritableMap resp = Arguments.createMap();

 if (taskSnapshot != null) 
 resp.putDouble("bytesTransferred", taskSnapshot.getBytesTransferred());
 resp.putString("downloadURL", taskSnapshot.getDownloadUrl() != null ? taskSnapshot.getDownloadUrl().toString() : null);

 StorageMetadata d = taskSnapshot.getMetadata();
 if (d != null) 
 WritableMap metadata = getMetadataAsMap(d);
 resp.putMap("metadata", metadata);
 

 resp.putString("ref", taskSnapshot.getStorage().getPath());
 resp.putString("state", this.getTaskStatus(taskSnapshot.getTask()));
 resp.putDouble("totalBytes", taskSnapshot.getTotalByteCount());
 
 return resp;
 

cannot resolve method "getDownloadUrl"

So if you have any suggestions for these two problems please share your knowledge.

Thank you! :)