为什么我的Java代码未将数据发送到Firebase？

Question

So I'm building an Android app that adds users to the Firebase database from a form inside the Register Activity.

I'm building this in Android studio 3 and already ran it on my HTC One M9

package com.example.mobilniproekt;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import com.google.firebase.FirebaseApp;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

import java.util.HashMap;
import java.util.Map;

public class RegisterActivity extends AppCompatActivity {

    private DatabaseReference databaseReference;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        Button button=(Button) findViewById(R.id.register);
        databaseReference= FirebaseDatabase.getInstance().getReference("users");
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                EditText name=(EditText) findViewById(R.id.name);
                EditText lastname=(EditText) findViewById(R.id.lastname);
                EditText city=(EditText) findViewById(R.id.city);
                EditText email=(EditText) findViewById(R.id.email);
                EditText username=(EditText) findViewById(R.id.username);
                EditText password=(EditText) findViewById(R.id.password);

                String id=databaseReference.push().getKey();
                User user=new User(id, name.getText().toString(), lastname.getText().toString(), city.getText().toString(), email.getText().toString(), username.getText().toString(), password.getText().toString());

                databaseReference.child(id).setValue(user);

                name.setText("");
            }
        });
    }
}

However when I launch the app, fill out the form and check my database there isn't any data.

Am I implementing the code wrong or is there another problem with the Firebase configuration?

Answer 1

You need to create a user first for them

mAuth.createUserWithEmailAndPassword(email, password)
        .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                if (task.isSuccessful()) {
                   FirebaseUser user = mAuth.getCurrentUser();
                } else {
                    Toast.makeText(EmailPasswordActivity.this, "Authentication failed.",
                            Toast.LENGTH_SHORT).show();
                }
            }
        });

Or if they already have account, they need to sign in first with their details

mAuth.signInWithEmailAndPassword(email, password)
        .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
            @Override
            public void onComplete(@NonNull Task<AuthResult> task) {
                if (task.isSuccessful()) {
                    FirebaseUser user = mAuth.getCurrentUser();
                } 
                 else {
                    Toast.makeText(EmailPasswordActivity.this, "Authentication failed.",
                    Toast.LENGTH_SHORT).show();
                }
            }
        });

Then you can send to firebase whatever data to write

Answer 2

Check if your app is allowed access to your firebase