firebase login for android application

Firebase Login for Android Application Example Source Code

In this Example, You will simply Login Firebase Cloud Database using Android , this is a Live Application Example : 

So, let Start : 

                                                activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.bschandel.indservices.MainActivity">


    <LinearLayout
        android:layout_centerHorizontal="true"
        android:layout_centerVertical = "true"
        android:orientation="vertical"
        android:layout_width = "match_parent"
        android:layout_height = "wrap_content" >

        <EditText
            android:layout_margin="15dp"
            android:inputType="textEmailAddress"
            android:hint="Enter your email"
            android:id="@+id/editTextEmail"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />


        <EditText
            android:layout_margin="15dp"
            android:inputType="textPassword"
            android:hint="Enter your Password"
            android:id="@+id/editTextPassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <Button
            android:layout_margin="15dp"
            android:id="@+id/buttonRegister"
            android:text="Register User"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <TextView
            android:textAlignment="center"
            android:text="Already Registered? Sign in here"
            android:id="@+id/textViewSignin"
            android:layout_width = "match_parent"
            android:layout_height = "wrap_content" />

    </LinearLayout>

</RelativeLayout>

Now we are configure to the Java Main Class : 

                                                       MainActivity.java

package com.example.bschandel.indservices;

import android.app.ProgressDialog;

import android.os.Bundle;

import android.support.annotation.NonNull;

import android.support.v7.app.AppCompatActivity;

import android.text.TextUtils;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

import com.google.android.gms.tasks.OnCompleteListener;

import com.google.android.gms.tasks.Task;

import com.google.firebase.auth.AuthResult;

import com.google.firebase.auth.FirebaseAuth;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

    private Button buttonRegister;

    private EditText editTextEmail;

    private EditText editTextPassword;

    private TextView textViewSignin;

    private ProgressDialog progressDialog;

    private FirebaseAuth firebaseAuth;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        progressDialog = new ProgressDialog(this);

        buttonRegister = (Button)findViewById(R.id.buttonRegister);

        editTextEmail = (EditText) findViewById(R.id.editTextEmail);

        editTextPassword = (EditText)findViewById(R.id.editTextPassword);

        textViewSignin  = (TextView) findViewById(R.id.textViewSignin);

        firebaseAuth = FirebaseAuth.getInstance();

        buttonRegister.setOnClickListener(this);

        textViewSignin.setOnClickListener(this);

    }

    private void registerUser()

    {

        String email = editTextEmail.getText().toString().trim();

        String password = editTextPassword.getText().toString().trim();

        if (TextUtils.isEmpty(email)) {

            //email is empty

            Toast.makeText(this,"Email is Empty, Please Enter Email ",Toast.LENGTH_SHORT).show();

            //stopping the function execution

            return;

        }

        if (TextUtils.isEmpty(password)) {

            //password is empty

            Toast.makeText(this,"Password is Empty, Please Enter a Password",Toast.LENGTH_SHORT).show();

            //stopping the function execution

            return;

        }

        // if validations are ok

        // we will first show a progressDialog

        progressDialog.setMessage("Registering User....");

        progressDialog.show();

        firebaseAuth.createUserWithEmailAndPassword(email,password)

                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {

                    @Override

                    public void onComplete(@NonNull Task<AuthResult> task) {

                        if(task.isSuccessful()) {

                            Toast.makeText(MainActivity.this,"Registered Successfully",Toast.LENGTH_SHORT).show();

                        }

                        else

                        {

                            Toast.makeText(MainActivity.this,"Could Not Register, Please Try Again!!",Toast.LENGTH_SHORT).show();

                        }

                    }

                });

    }

    @Override

    public void onClick(View view) {

        if(view == buttonRegister) {

            registerUser();

        }

        if(view == textViewSignin)

        {

            //will open login Activity here

        }

    }

}

Now Configure Android Manifest.xml file , simply use this permission

<uses-permission android:name="android.permission.INTERNET" />

And uses this compiler for gradle file : 

compile 'com.google.firebase:firebase-auth:11.4.2'

And also, some dependencies are require for multiple urls , so use 

 

repositories {

                       mavenCentral()

              }

That's it,

Now just copy and paste this code and use it... wherever you want a login activities....

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