CODEWITHSUNDEEP
javaandroidfirebasefirebase-realtime-database
Ashonko
Ashonko

Reputation: 613

Firebase database DataSnapshot not working

I'm trying to show the logged in user a welcome message based on their gender. If 'male', then setText("Hello Sir, your mail is: " + user.getEmail()) and for else, setText("Hello Madam, your mail is: " + user.getEmail()). This is my databse structure: enter image description here

This is the profile activity java that I'm working on:

import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.support.v7.app.AppCompatActivity;
import com.firebase.client.DataSnapshot;
import com.firebase.client.Firebase;
import com.firebase.client.FirebaseError;
import com.firebase.client.ValueEventListener;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

public class ProfileActivity extends AppCompatActivity {
    TextView textViewUserEmail;

    private FirebaseDatabase mFirebaseDatabase;
    private FirebaseAuth mAuth;
    public DatabaseReference myRef;
    public String userID;

    @Override
    protected void onCreate(Bundle saveInstanceState) {
        super.onCreate(saveInstanceState);
        setContentView(R.layout.activity_profile);

        mAuth = FirebaseAuth.getInstance();
        Firebase.setAndroidContext(this);
        mFirebaseDatabase = FirebaseDatabase.getInstance();
        myRef = mFirebaseDatabase.getReference();
        final FirebaseUser user = mAuth.getCurrentUser();
        userID = user.getUid();
        DatabaseReference ref = FirebaseDatabase.getInstance().getReference().child("UsersMale");

        textViewUserEmail = (TextView) findViewById(R.id.textViewUserEmail);
        loadUserInformation();

        ref.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                String myStrign = dataSnapshot.getValue(String.class);
                if (user.isEmailVerified() && myStrign.equals("male")) {
                    textViewUserEmail.setText("Hello Sir, your mail is: " + user.getEmail());
                } else {
                    textViewUserEmail.setText("Hello Madam, your mail is: " + user.getEmail());
                }
            }

            @Override
            public void onCancelled(FirebaseError firebaseError) {}
        });
    }

}
}

The code is returning an error. Can you please suggest me what I'm doing wrong here? Thanks in advance.

Upvotes: 1

Views: 2463

Answers (1)

Peter Haddad
Peter Haddad

Reputation: 80914

Change the database structure to this:

 users
   uniqueId
        name: superman
        gender: male
   uniqueId
        name: girl
        gender: female

No need to have two parent nodes UserMale and UserFemale, just create one node call it users and each user will have an attribute gender.

then do this:

FirebaseUser user = mAuth.getCurrentUser();
String userID = user.getUid();
DatabaseReference ref = FirebaseDatabase.getInstance().getReference().child("users");

ref.child(userID).addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {

            String gender=dataSnapshot.child("gender").getValue().toString();
            if(gender.equals("male")) {
                textViewUserEmail.setText("Hello Sir, your mail is: " + user.getEmail());
            } else {
                textViewUserEmail.setText("Hello Madam, your mail is: " + user.getEmail());
            }
        }

        @Override
        public void onCancelled(FirebaseError firebaseError) {}
    });
}

First retrieve the userid then put the location at users, then attach a listener and retrieve the gender value of the logged in user.

Upvotes: 4

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