CODEWITHSUNDEEP
javaandroidswiftfirebasegoogle-cloud-firestore
KevinB
KevinB

Reputation: 2484

Java Android - How to call onSuccess method

I'm really new to Java & Andoid, I used to code in Swift.

I'm currently coding the register activity, and more precisely, I'm coding a method to add user data in Cloud Firestore.

In swift I coded something like that:

func signupUser(firstname: String, lastname: String, onSuccess: @escaping () -> Void) {

      REF_USERS.document(uid).setData([
         "firstname": firstname,
         // etc..
      ]) { (err) in
         if let err = err {
            print("Error adding document: \(err)")
         } else {
            // THE FUNCTION HERE
            onSuccess()
         }
      }
   }

I would like to have the same "onSuccess()" method in Android, but I don't know how to do it...

I searched but I didn't find anything ...

This is my code without the onSuccess():

public void addNewUser(String firstname, String lastname, String email, Integer gender, String uid, String profileImageUrl){

        Map<String, Object> data = new HashMap<>();
        data.put("firstname", firstname);
        data.put("lastname", lastname);
        data.put("email", email);
        data.put("gender", gender);
        data.put("boxId", "independent");
        data.put("notificationsEnabled", true);
        data.put("profileImageUrl", profileImageUrl);

        mFirebaseFirestore.collection("users").add(data)
                .addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
            @Override
            public void onSuccess(DocumentReference documentReference) {
                Log.d(TAG, "DocumentSnapshot written with ID: " + documentReference.getId());
            }
        })
                .addOnFailureListener(new OnFailureListener() {
                    @Override
                    public void onFailure(@NonNull Exception e) {
                        Log.w(TAG, "Error adding document", e);
                    }
                });

    }

Upvotes: 1

Views: 3198

Answers (1)

Fangming
Fangming

Reputation: 25261

This is called callback in java.

First, you define the callback interface with desired functions and input.

public interface FooOnSuccessListener {
    void iWantToPassOutAnInteger(int passItOut);
}

Next, in your addNewUser method, passin this interface as imput and call it to pass your data

public void addNewUser(String someInput, final FooOnSuccessListener listener){

    mFirebaseFirestore.collection("users").add(data).addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
        @Override
        public void onSuccess(DocumentReference documentReference) {
            listener.iWantToPassOutAnInteger(FromYourFirebase.someInteger);
        }
    });

}

Finally, let's say your addNewUser method comes from class Foo. You can then do something like:

Foo.addNewUser("some param", new FooOnSuccessListener() {
    @Override
    public void iWantToPassOutAnInteger(int passItOut) {
        //Do something with param passItOut
    }
});

Upvotes: 2

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