Patient_SignUp.java

package com.example.android.patientsignup;

import android.app.ProgressDialog;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.example.android.patientsignup.R;
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;
import com.google.firebase.database.FirebaseDatabase;


public class Patient_SignUp extends AppCompatActivity implements View.OnClickListener {

    private EditText editName,editGender,editAge, editArea, editEmail,editPassword, editPhoneNumber;
    private Button signUp;
    private ProgressDialog progressDialog;
    private  String name,gender,age, area,email,password, phoneNumber;
    private FirebaseAuth mAuth;

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

        mAuth = FirebaseAuth.getInstance();

        editName = findViewById(R.id.patientName_id);
        editAge = findViewById(R.id.patientAgeId);
        editGender = findViewById(R.id.patientGenderId);
        editArea = findViewById(R.id.patientAreaId);
        editPhoneNumber = findViewById(R.id.patientPhoneNumber_Id)
        editEmail = findViewById(R.id.patientEmail_Id);
        editPassword = findViewById(R.id.patientPassword_Id);

        signUp = findViewById(R.id.patientSignUpButton_Id);
        signUp.setOnClickListener(this);

        progressDialog = new ProgressDialog(this);


    }

    private void registration()
    {
        name = editName.getText().toString().trim();
        gender = editGender.getText().toString().trim();
        age = editAge.getText().toString().trim();
        area = editArea.getText().toString().trim();
        phoneNumber = editPhoneNumber.getText().toString().trim();
        email = editEmail.getText().toString().trim();
        password = editPassword.getText().toString().trim();


        if(TextUtils.isEmpty(email)){
            editEmail.setError("Email Can't be Empty");
            editEmail.requestFocus();
            return;

        }

        if(TextUtils.isEmpty(password)){
            editPassword.setError("Password Can't be Empty");
            editPassword.requestFocus();
            return;

        }
        if (password.length() < 6) {
            editPassword.setError("Minimum Password length 6");
            editPassword.requestFocus();
            return;
        }

        if(name.isEmpty())
        {
            editName.setError("Name ccan't be empty");
            editName.requestFocus();
            return;
        }
        progressDialog.setMessage("Registration in process...");
        progressDialog.show();



        mAuth.createUserWithEmailAndPassword(email,password)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if(task.isSuccessful()){
                            progressDialog.dismiss();

                            Patient_Info user = new Patient_Info(name, gender, age, area, phoneNumber, email);

                            FirebaseDatabase.getInstance().getReference("Users")
                                    .child(FirebaseAuth.getInstance().getCurrentUser().getUid())
                                    .setValue(user).addOnCompleteListener(new OnCompleteListener<Void>() {
                                @Override
                                public void onComplete(@NonNull Task<Void> ttask) {

                                    if (ttask.isSuccessful()) {
                                        Toast.makeText(Patient_SignUp.this, "Resistration Successful", Toast.LENGTH_LONG).show();
                                        finish();
                                    } else {
                                        //display a failure message
                                        Toast.makeText(Patient_SignUp.this,ttask.getException().getMessage(),Toast.LENGTH_LONG).show();
                                    }
                                }
                            });

                            //startActivity(new Intent(getApplicationContext(),UserCatagory.class));
                            //Toast.makeText(SignUp.this,"Registered Succeessful",Toast.LENGTH_SHORT).show();
                        }
                        else
                        {
                            progressDialog.dismiss();
                            Toast.makeText(Patient_SignUp.this, task.getException().getMessage(), Toast.LENGTH_LONG).show();                        }

                    }
                });


    }

    @Override
    public void onClick(View view) {
        if(view == signUp)
        {
            Toast.makeText(Patient_SignUp.this,"SignUp pressed",Toast.LENGTH_SHORT).show();
            registration();
        }
    }
}