Question

Android Problem Using JAVA

Problem:
You need to create an app on Android Studios that allows users to register and login into the system. The focus of this project is for you to create an app with several activities and has data validation.
You should have for your app:

• A welcome screen (splash screen) with your app name and a picture.
• You should then move to a screen that asks the user for either to log in or to register.
• If the user clicks the registration page, the registration page should have fields for at least first name, family name, date of birth, email, and a password.
• Validate that the entered data is not empty.
• Check that the entered data is correct (such as email validation, first name should at least 3 char and not more than 30)
• If registration successful return to the previous screen.
• Enable login (it doesn’t have to be linked to a database at this stage)You need to add comments to your code (Java and XML).
• You need to have a nice design.
• Make sure that you test your app at least on two different devices (phone and tablet) and for portrait and landscape modes.

Answer 1

*****Main Activity 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:layout_height="match_parent"
    android:background="@color/colorBlue"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="25dp"
        android:paddingBottom="25dp"
        android:paddingLeft="20dp"
        android:padding="10dp"
        android:textColor="@color/colorAccent"
        android:textStyle="bold"
        android:layout_marginTop="55dp"
        android:text="05 reantle Service Welcome You..." />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="25dp"
        android:textStyle="bold"
        android:textColor="@color/colorPrimaryDark"
        android:layout_marginTop="105dp"
        android:padding="15dp"
        android:paddingRight="15dp"
        android:paddingBottom="20dp"
        android:text="Book Your Bike and Car here" />

    <Button
        android:id="@+id/log_in"
        android:layout_width="200dp"
        android:layout_height="80dp"
        android:layout_marginTop="250dp"
        android:textColor="@color/colorWhite"
        android:textSize="30dp"
        android:textStyle="bold"
        android:textColorLink="@color/colorAccent"
        android:textColorHighlight="@color/colorPrimaryDark"
        android:background="@color/colorPrimary"
        android:text="sign in" />

    <Button
        android:id="@+id/signup"
        android:layout_width="200dp"
        android:layout_height="80dp"
        android:layout_marginTop="250dp"
        android:layout_marginLeft="212dp"
        android:textColor="@color/colorWhite"
        android:textSize="30dp"
        android:textStyle="bold"
        android:textColorLink="@color/colorAccent"
        android:textColorHighlight="@color/colorPrimaryDark"
        android:background="@color/colorPrimary"
        android:text="sign up" />
</RelativeLayout>

*****Log_in 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:layout_height="match_parent"
    android:background="@drawable/back"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        app:srcCompat="@drawable/ellipse1" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="15dp"
        android:layout_marginLeft="45dp"
        app:srcCompat="@drawable/reantel" />

    <EditText android:id="@+id/input_email"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="160dp"
        android:textSize="20dp"
        android:inputType="textEmailAddress"
        android:hint="Email" />

    <EditText android:id="@+id/input_password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="210dp"
        android:inputType="textPassword"
        android:hint="Password"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Attempt Left"
        android:id="@+id/attempt"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="260dp"
        android:textSize="25dp" />

    <TextView
        android:id="@+id/forgot"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Forgot Password?"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="262dp"
        android:layout_marginLeft="240dp"
        android:textSize="20dp" />


    <Button
        android:id="@+id/button"
        android:layout_width="210dp"
        android:layout_height="55dp"
        android:layout_marginTop="315dp"
        android:layout_marginLeft="100dp"
        android:background="#47A891"
        android:text="sign in"
        android:textSize="29dp"/>


    <TextView
        android:id="@+id/link_signup"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="380dp"
        android:text="No account yet? Create one"
        android:gravity="center"
        android:textSize="22dip"/>


</RelativeLayout>

*****XML of SignUp*******

<?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:layout_height="match_parent"
    android:background="@color/colorRed"
    tools:context=".MainActivity">


    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        app:srcCompat="@drawable/ellipse1" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="15dp"
        android:layout_marginLeft="45dp"
        app:srcCompat="@drawable/reantel" />

    <EditText
        android:id="@+id/input_name"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:hint="Name"
        android:inputType="textPersonName"
        android:layout_marginTop="130dp"
        />

    <EditText
        android:id="@+id/input_faname"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:hint="Father's Name"
        android:inputType="textPersonName"
        android:layout_marginTop="185dp"
        />


    <EditText
        android:id="@+id/input_email"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:hint="Email"
        android:layout_marginTop="239dp"
        android:inputType="textEmailAddress"
        />



    <EditText
        android:id="@+id/input_password"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:hint="Password"
        android:layout_marginTop="290dp"
        android:inputType="textPassword"/>

    <EditText
        android:id="@+id/input_reEnterPassword"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:hint="Re-enter Password"
        android:layout_marginTop="339dp"
        android:inputType="textPassword"/>

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="530dp"
        android:layout_marginLeft="65dp"
        android:textStyle="bold"
        android:textColor="@color/colorWhite"
        android:textSize="35dp"
        android:background="@drawable/button_back"
        android:text="Sign up" />

    <Button
        android:id="@+id/cal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="400dp"
        android:text="DOB"
        android:textStyle="bold"
        android:shadowColor="@color/colorRed"
        android:textSize="25dp"/>

<ProgressBar
    android:id="@+id/progressBar"
    android:layout_width="30dp"
    android:layout_height="30dp"
    android:layout_marginTop="550dp"
    android:visibility="gone"/>

</RelativeLayout>

****Splash Screen 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:layout_height="match_parent"
    tools:context=".MainActivity" >


    <WebView
        android:id="@+id/web"
        android:layout_width="390dp"
        android:layout_height="100dp"
        android:layout_marginTop="250dp"/>
</RelativeLayout>

****Splash Screen Java code*****

package com.example.allgoods;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.content.Intent;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebView;

public class MainActivity extends AppCompatActivity {
    WebView web;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        web = (WebView)findViewById(R.id.web);
        web.loadUrl("file:///android_res/raw/reantel.png");
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                Intent in = new Intent(MainActivity.this,(write your own next activity ).class);
                startActivity(in);
                finish();
            }
        },1000);
    }

    @Override
    public void onBackPressed() {

    }
}}

*****java class of DOB***

import android.app.DatePickerDialog;
import android.app.Dialog;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.DialogFragment;

import java.util.Calendar;

public class DatePick extends DialogFragment {
    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
        Calendar c = Calender.getInstance();
        int year =  c.get(Calendar.YEAR);
        int month = c.get(Calendar.MONTH);
        int day = c.get(Calendar.DAY_OF_MONTH)
        return new DatePickerDialog(getActivity(),(DatePickerDialog.OnDateSetListener)getActivity(),year,month,day);
    }
}

********Code of DOB*****

package com.example.allgoods;

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.DialogFragment;

import android.app.DatePickerDialog;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;

import java.text.DateFormat;
import java.util.Calendar;

public class MainActivity extends AppCompatActivity implements DatePickerDialog.OnDateSetListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
     Button but = (Button)findViewById(R.id.button); 
     but.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View view) {
             DialogFragment datePicker = new DatePickerFragment();
             datePicker.show(getSupportFragmentManager(),"date picker");
         }
     });
    }

    @Override
    public void onDateSet(DatePicker datePicker, int year, int month, int day) {
        Calendar c =  Calendar.getInstance();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month);
        c.set(Calendar.DAY_OF_MONTH, day);
        String currentDateString = DateFormat.getDateInstance(DateFormat.FULL).format(c.getTime());
    }
}

*****Code of signup*******

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.util.Patterns;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

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

import static android.widget.Toast.LENGTH_SHORT;


public class SignUp extends AppCompatActivity {

    String name,number,password,re_password,email;
    EditText et_name, et_number, et_pass, re_pass, et_email,faname;
    ImageView sign_up;
    TextView login;
    ProgressBar progressBar;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sign_up);

        
        progressBar = (ProgressBar)findViewById(R.id.progressBar)
        et_name = (EditText) findViewById(R.id.input_name);
        faname = (EditText)findViewById(R.id.input_faname);
        et_pass = (EditText) findViewById(R.id.input_password);
        re_pass = (EditText) findViewById(R.id.input_reEnterPassword);
        et_email = (EditText) findViewById(R.id.input_email);

login = (TextView) findViewById(R.id.link_login);

login.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Intent login = new Intent(SignUp.this, Signin.class);
        startActivity(login);
        finish();
        overridePendingTransition(R.anim.push_left_in, R.anim.push_left_out);
    }
});

sign_up.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        if(validate()){
            
            String email = et_email.getText().toString().trim();
            String password = et_pass.getText().toString().trim();

if(task.isSuccessful()){
                        //sendEmailVerification();
                        sendUserData();
                        
                        Toast.makeText(SignUp.this, "Successfully Registered, Upload complete!", Toast.LENGTH_SHORT).show();
                        finish();
                        startActivity(new Intent(SignUp.this, Signin.class));
                    }else{
                        Toast.makeText(SignUp.this, "Registration Failed", Toast.LENGTH_SHORT).show();
                    }

                }
            });
        }
    }
});

     login.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View view) {
             startActivity(new Intent(SignUp.this, Signin.class));
         }
     });

 }



 private Boolean validate(){
     Boolean result = false;

     name = et_name.getText().toString();
     password = et_pass.getText().toString();
     email = et_email.getText().toString();
     faname= et_faname.getText().toString();
     re_password= re_pass.getText().toString();


     if(name.isEmpty() || password.isEmpty() || email.isEmpty() || faname.isEmpty() || re_password.isEmpty()){
         Toast.makeText(this, "Please enter all the details", Toast.LENGTH_SHORT).show();
     }else{
         result = true;
     }

     return result;
 }


             @Override
             public void onComplete(@NonNull Task<Void> task) {
                 if(task.isSuccessful()){
                     sendUserData();
                     Toast.makeText(SignUp.this, "Successfully Registered, Verification mail sent!", Toast.LENGTH_SHORT).show();
                     
                     finish();
                     startActivity(new Intent(SignUp.this, Log_nin.class));
                 }else{
                     Toast.makeText(SignUp.this, "Verification mail has'nt been sent!", Toast.LENGTH_SHORT).show();
                 }
             }
         });
     }
 }