MainActivity


package com.arman.sqlite;

import android.content.DialogInterface;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.support.annotation.NonNull;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;

import com.arman.sqlite.Model.User;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.rengwuxian.materialedittext.MaterialEditText;

public class MainActivity extends AppCompatActivity {


    Button loginIn, signIn;
    RelativeLayout relativeLayout;

    FirebaseAuth auth;
    FirebaseDatabase db;
    DatabaseReference users;

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


        loginIn = findViewById(R.id.button_login);
        signIn = findViewById(R.id.button_registration);
        relativeLayout = findViewById(R.id.rootlayout);

        auth = FirebaseAuth.getInstance();
        db = FirebaseDatabase.getInstance();
        users = db.getReference("Users");


        loginIn.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {
                showLoginDialog();
            }
        });

        signIn.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {
                showregisterDialog();
            }
        });


    }

    private void showLoginDialog() {
        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
        dialog.setTitle("SIGN IN ");
        dialog.setCancelable(false);
      //  dialog.setMessage("Please Use Email to Sign In");
        LayoutInflater inflater = LayoutInflater.from(this);
        View login_layout = inflater.inflate(R.layout.login, null);

        final MaterialEditText editEmail = login_layout.findViewById(R.id.edit_email);
        final MaterialEditText editPassword = login_layout.findViewById(R.id.edit_password);

        dialog.setView(login_layout);

        //set Button        dialog.setPositiveButton("SIGN IN", new DialogInterface.OnClickListener() {
            @Override            public void onClick(DialogInterface dialog, int which) {

                dialog.dismiss();
                ;
                //Check validation                if (TextUtils.isEmpty(editEmail.getText().toString())) {
                    Snackbar.make(relativeLayout, "Please enter email address", Snackbar.LENGTH_SHORT).show();
                    return;
                }


                if (TextUtils.isEmpty(editPassword.getText().toString())) {
                    Snackbar.make(relativeLayout, "Please enter Password", Snackbar.LENGTH_SHORT).show();
                    return;
                }

                if (editPassword.getText().toString().length() < 6) {
                    Snackbar.make(relativeLayout, "Password too short !!!", Snackbar.LENGTH_SHORT).show();
                    return;
                }

                //Login                auth.signInWithEmailAndPassword(editEmail.getText().toString(), editPassword.getText().toString())
                        .addOnSuccessListener(new OnSuccessListener<AuthResult>() {
                            @Override                            public void onSuccess(AuthResult authResult) {
                                startActivity(new Intent(MainActivity.this, Welcome.class));
                                finish();
                            }
                        }).addOnFailureListener(new OnFailureListener() {
                    @Override                    public void onFailure(@NonNull Exception e) {
                        Snackbar.make(relativeLayout, "Failed" + e.getMessage(), Snackbar.LENGTH_SHORT)
                                .show();
                    }
                });


            }
        });

        dialog.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
            @Override            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });


        dialog.show();
    }


    private void showregisterDialog() {
        AlertDialog.Builder dialog = new AlertDialog.Builder(this);
        dialog.setCancelable(false);
        dialog.setTitle("Register Your Account! ");
        // dialog.setMessage("User Registration");
        LayoutInflater inflater = LayoutInflater.from(this);
        View register_layout = inflater.inflate(R.layout.register, null);

        final MaterialEditText editEmail = register_layout.findViewById(R.id.edit_email);
        final MaterialEditText editPassword = register_layout.findViewById(R.id.edit_password);
        final MaterialEditText editName = register_layout.findViewById(R.id.edit_name);
        final MaterialEditText editPhone = register_layout.findViewById(R.id.edit_phone);

        dialog.setView(register_layout);

        //set Button        dialog.setPositiveButton("REGISTER", new DialogInterface.OnClickListener() {
            @Override            public void onClick(DialogInterface dialog, int which) {

                dialog.dismiss();

                //Check validation                if (TextUtils.isEmpty(editEmail.getText().toString())) {
                    Snackbar.make(relativeLayout, "Please enter email address", Snackbar.LENGTH_SHORT).show();
                    return;
                }

                if (TextUtils.isEmpty(editPhone.getText().toString())) {
                    Snackbar.make(relativeLayout, "Please enter Phone Number", Snackbar.LENGTH_SHORT).show();
                    return;
                }

                if (TextUtils.isEmpty(editPassword.getText().toString())) {
                    Snackbar.make(relativeLayout, "Please enter Password", Snackbar.LENGTH_SHORT).show();
                    return;
                }

                if (editPassword.getText().toString().length() < 6) {
                    Snackbar.make(relativeLayout, "Password too short !!!", Snackbar.LENGTH_SHORT).show();
                    return;
                }

                //Register new Account                auth.createUserWithEmailAndPassword(editEmail.getText().toString(), editPassword.getText().toString())
                        .addOnSuccessListener(new OnSuccessListener<AuthResult>() {
                            @Override                            public void onSuccess(AuthResult authResult) {
                                //Save user to db                                User user = new User();
                                user.setEmail(editEmail.getText().toString());
                                user.setName(editName.getText().toString());
                                user.setPassword(editPassword.getText().toString());
                                user.setPhone(editPhone.getText().toString());

                                //Use email to key                                users.child(FirebaseAuth.getInstance().getCurrentUser().getUid())
                                        .setValue(user)
                                        .addOnSuccessListener(new OnSuccessListener<Void>() {
                                            @Override                                            public void onSuccess(Void aVoid) {
                                                Snackbar.make(relativeLayout, "Register SuccessFully", Snackbar.LENGTH_SHORT).show();
                                            }
                                        })
                                        .addOnFailureListener(new OnFailureListener() {
                                            @Override                                            public void onFailure(@NonNull Exception e) {
                                                Snackbar.make(relativeLayout, "Failed " + e.getMessage(), Snackbar.LENGTH_SHORT).show();
                                            }
                                        });


                            }
                        })
                        .addOnFailureListener(new OnFailureListener() {
                            @Override                            public void onFailure(@NonNull Exception e) {
                                Snackbar.make(relativeLayout, "Failed " + e.getMessage(), Snackbar.LENGTH_SHORT).show();
                            }
                        });

            }
        });

        dialog.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
            @Override            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });

        dialog.show();

    }
}


User ( Model )


package com.arman.sqlite.Model;


public class User {
    private String email,password,name,phone;

    public User() {
    }

    public User(String email, String password, String name, String phone) {
        this.email = email;
        this.password = password;
        this.name = name;
        this.phone = phone;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }
}

Activity main XML



<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:background="@drawable/backg"    android:id="@+id/rootlayout"    android:layout_height="match_parent"    tools:context=".MainActivity">

    <LinearLayout        android:orientation="vertical"        android:layout_width="match_parent"        android:layout_height="match_parent">

        <TextView            android:gravity="center"            android:id="@+id/textView"            android:textSize="25sp"            android:textAllCaps="true"            android:layout_margin="20sp"            android:textColor="#0CB4D6"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:text="Kapse Uber" />

        <LinearLayout
            android:layout_marginTop="100sp"            android:layout_marginBottom="100sp"            android:orientation="vertical"            android:layout_width="match_parent"            android:layout_height="250sp">

            <ImageView                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:scaleType="fitXY"                android:src="@drawable/uber" />

        </LinearLayout>

        <LinearLayout            android:gravity="center"            android:layout_marginTop="20sp"            android:orientation="horizontal"            android:layout_width="match_parent"            android:layout_height="wrap_content">

            <Button                android:layout_marginRight="10sp"                android:layout_marginEnd="10sp"                android:text="Login"                android:background="#009688"                android:id="@+id/button_login"                android:layout_width="wrap_content"                android:layout_height="wrap_content" />

            <Button                android:id="@+id/button_registration"                android:layout_width="120dp"                android:layout_height="wrap_content"                android:layout_marginLeft="10sp"                android:background="#CDDC39"                android:text="Registration" />

        </LinearLayout>

    </LinearLayout>



</RelativeLayout>



Login .XML




<?xml version="1.0" encoding="utf-8"?><android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    app:cardElevation="10dp">

    <LinearLayout        android:orientation="vertical"        android:layout_margin="20sp"        android:layout_width="match_parent"        android:layout_height="wrap_content">

        <com.rengwuxian.materialedittext.MaterialEditText            android:id="@+id/edit_email"            android:hint="Email:"            android:textSize="20sp"            android:textColor="#2196F3"            android:textColorHint="#4CAF50"            android:layout_width="match_parent"            android:layout_height="wrap_content" />
        <com.rengwuxian.materialedittext.MaterialEditText            android:id="@+id/edit_password"            android:hint="Password:"            android:textSize="20sp"            android:textColor="#2196F3"            android:textColorHint="#4CAF50"            android:layout_width="match_parent"            android:layout_height="wrap_content" />


    </LinearLayout>

</android.support.v7.widget.CardView>


Register.xml



<?xml version="1.0" encoding="utf-8"?><android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    app:cardElevation="10dp">

    <LinearLayout        android:orientation="vertical"        android:layout_margin="20sp"        android:layout_width="match_parent"        android:layout_height="wrap_content">

        <com.rengwuxian.materialedittext.MaterialEditText            android:id="@+id/edit_email"            android:hint="Email:"            android:textSize="20sp"            android:textColor="#2196F3"            android:textColorHint="#4CAF50"            android:layout_width="match_parent"            android:layout_height="wrap_content" />
        <com.rengwuxian.materialedittext.MaterialEditText            android:id="@+id/edit_password"            android:hint="Password:"            android:textSize="20sp"            android:textColor="#2196F3"            android:textColorHint="#4CAF50"            android:layout_width="match_parent"            android:layout_height="wrap_content" />
        <com.rengwuxian.materialedittext.MaterialEditText            android:id="@+id/edit_name"            android:hint="Name:"            android:textSize="20sp"            android:textColor="#2196F3"            android:textColorHint="#4CAF50"            android:layout_width="match_parent"            android:layout_height="wrap_content" />
        <com.rengwuxian.materialedittext.MaterialEditText            android:id="@+id/edit_phone"            android:hint="Phone:"            android:textSize="20sp"            android:textColor="#2196F3"            android:textColorHint="#4CAF50"            android:layout_width="match_parent"            android:layout_height="wrap_content" />

    </LinearLayout>

</android.support.v7.widget.CardView>


// Adding Gradleimplementation 'com.rengwuxian.materialedittext:library:2.1.4'implementation 'com.android.support:cardview-v7:28.0.0'implementation 'com.android.support:design:28.0.0'
//Adding FireBaseimplementation 'com.google.firebase:firebase-auth:16.1.0'implementation 'com.google.firebase:firebase-database:16.0.6'