Is There A Way To Write This Database Call Into A Function Easily?

All of the text in an application I'm working on is stored inside FireStore documents, so to retrieve it I use this bit of code db.collection('language').document('kCreateNewAccoun

Solution 1:

Firebase queries are async, you have to use a callback function.

1. Create Interface for callback

   publicinterfaceOnCompleteListener {
        voidonComplete(String text);
    }
   

2. Create method for fetching text via document name

   publicvoidgetText(Stringdocument, final OnCompleteListener onCompleteListener) {
            db.collection("language").document(document).get()
                    .addOnSuccessListener(newOnSuccessListener<DocumentSnapshot>() {
                        @OverridepublicvoidonSuccess(DocumentSnapshot documentSnapshot) {
                            String viewText = lan.equals("en") ? documentSnapshot.getString("en")
                                    : documentSnapshot.getString("es");
                            onCompleteListener.onComplete(viewText);
                        }
                    });
        }
   

3. Call the method with your document name and specifying a listener

   getText("kCreateNewAccount", newOnCompleteListener() {
                @OverridepublicvoidonComplete(String text) {
                    createAccount.setText(text);
                }
            });