Develop an android application to accept and display personal information of the student

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:padding="10dp"
    android:gravity="center">

    <TextView android:id="@+id/tvInfo"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Personal Information of Student"
        android:textSize="20sp"
        android:gravity="center_horizontal"
        android:textStyle="bold"
        android:layout_marginTop="20dp"
        android:textColor="@android:color/holo_red_light"/>

    <EditText android:id="@+id/name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter you name"
        android:ems="10"
        android:inputType="textPersonName"
        android:textSize="18sp"
        android:layout_marginTop="50dp"
        android:layout_below="@+id/tvInfo"/>

    <EditText android:id="@+id/dob"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter Date of Birth"
        android:ems="10"
        android:inputType="date"
        android:textSize="18sp"
        android:layout_below="@+id/name"
        android:layout_marginTop="25dp"/>

    <EditText android:id="@+id/city"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter your City"
        android:ems="10"
        android:inputType="textCapCharacters"
        android:textSize="18sp"
        android:layout_below="@+id/dob"
        android:layout_marginTop="25dp"/>

    <EditText android:id="@+id/email"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter Email ID"
        android:ems="10"
        android:inputType="textEmailAddress"
        android:textSize="18sp"
        android:layout_below="@+id/city"
        android:layout_marginTop="25dp"/>

    <EditText android:id="@+id/contact"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter Contact number"
        android:ems="10"
        android:inputType="date"
        android:textSize="18sp"
        android:layout_below="@+id/email"
        android:layout_marginTop="25dp"/>

    <Button android:id="@+id/btnSubmit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/contact"
        android:layout_marginTop="50dp"
        android:text="Submit"
        android:textSize="18sp"
        android:onClick="displayData"/>
</RelativeLayout>

MainActivity.java

package com.example.studentpersonalinfoapp;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {

    EditText name, dob, city, email, contact;
    Button submit;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        name = findViewById(R.id.name);
        dob = findViewById(R.id.dob);
        city = findViewById(R.id.city);
        email = findViewById(R.id.email);
        contact = findViewById(R.id.contact);
        submit = findViewById(R.id.btnSubmit);

        submit.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                String n = name.getText().toString();
                String d = dob.getText().toString();
                String ci = city.getText().toString();
                String e = email.getText().toString();
                String c = contact.getText().toString();

                if(n.isEmpty() || d.isEmpty() || ci.isEmpty() || e.isEmpty() || c.isEmpty())
                {
                    Toast.makeText(getApplicationContext(), "Please enter all data", Toast.LENGTH_SHORT).show();
                }
                else
                {
                    Toast.makeText(getApplicationContext(), n + "\n" + d + "\n" + ci + "\n" + e + "\n" + c, Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}

OUTPUT