Question

Using AndroidStudio

Create a mobile app UI that has the following labels and textboxes.

• Customer Name
• Customer ID
• Customer Address

The mobile app UI should also contain a Submit button. The following validation should be executed as soon as user clicks the Submit button.

• Customer ID should be between 0-1000. If user enters any value above 1000, then you need to display an error message.
• Customer Name should not contain any numeric characters. If user enters customer name with numbers, then display an error message.
• Customer ID, Name, and Address are required fields. If user do not enter any of the values, then display the required field validation error message.

Once you build the UI, then create an additional screen that shows following things:

Customer OrderID(Label):__________

Order_Name(Label):__________

Order_Quantity:_____________

Order_FullfilledBy:____________

Answer 1

CODE :-

1st Activity :-

It contains main page of the application, where validation is done.

xml file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Customer Name:-"
            android:textSize="25dp"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/name"
            android:textSize="25dp"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Customer ID:-"
            android:textSize="25dp"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/id"
            android:inputType="number"
            android:textSize="25dp"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Customer Address:-"
            android:textSize="25dp"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/address"
            android:textSize="25dp"/>

    </LinearLayout>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="submit"
        android:layout_gravity="center"
        android:layout_marginTop="50dp"
        android:id="@+id/submit"/>

</LinearLayout>

java file

package com.example.myapplication1;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
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,id,address;
    Button submit;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        name=findViewById(R.id.name);
        id=findViewById(R.id.id);
        address=findViewById(R.id.address);
        submit=findViewById(R.id.submit);

        submit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String Customer_name=name.getText().toString();
                String Customer_ID=id.getText().toString();
                String Customer_address=address.getText().toString();

                //this if will check that whether all the fields are filled or not.
                if(Customer_name.equals("") || Customer_ID.equals("") || Customer_address.equals(""))
                {
                    Toast.makeText(getApplicationContext(),"all the details are not filled",Toast.LENGTH_LONG).show();
                }
                //this else if will for both customer id and customer name are entered //correctlly or not
                else if(Integer.parseInt(Customer_ID)<0 || Integer.parseInt(Customer_ID)>=1000 && (Customer_name.contains("0") || Customer_name.contains("1")  || Customer_name.contains("2") || Customer_name.contains("3") || Customer_name.contains("4") || Customer_name.contains("5") || Customer_name.contains("6") || Customer_name.contains("7") || Customer_name.contains("8") || Customer_name.contains("9")))
                {
                    Toast.makeText(getApplicationContext(),"invalid CUSTOMER_NAME and CUSTOMER_ID",Toast.LENGTH_SHORT).show();
                }
                //this else will check for valid customer id and customer name.
                else
                {
                    if(Integer.parseInt(Customer_ID)<0 || Integer.parseInt(Customer_ID)>=1000 || (Customer_name.contains("0") || Customer_name.contains("1")  || Customer_name.contains("2") || Customer_name.contains("3") || Customer_name.contains("4") || Customer_name.contains("5") || Customer_name.contains("6") || Customer_name.contains("7") || Customer_name.contains("8") || Customer_name.contains("9")))
                   {


                       if(Integer.parseInt(Customer_ID)<0 || Integer.parseInt(Customer_ID)>1000)
                       {
                           Toast.makeText(getApplicationContext(),"invalid Customer_ID",Toast.LENGTH_SHORT).show();
                       }
                       if((Customer_name.contains("0") || Customer_name.contains("1")  || Customer_name.contains("2") || Customer_name.contains("3") || Customer_name.contains("4") || Customer_name.contains("5") || Customer_name.contains("6") || Customer_name.contains("7") || Customer_name.contains("8") || Customer_name.contains("9")))
                       {
                           Toast.makeText(getApplicationContext(),"invalid Customer_Name",Toast.LENGTH_SHORT).show();
                       }
                   }
                    //if all the valid details are filled and all the conditions satisfied  //than this else will execute and take us to another page.
                    else
                    {
                        Intent i=new Intent(getApplicationContext(),Main2Activity.class);
                        startActivity(i);
                    }
                }
            }
        });
    }
}

*************************************************************************************************

2nd Activity :-

It contains the 2nd page which will open after clicking on submit button.

xml file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    tools:context=".Main2Activity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Customer OrderID:-"
            android:textSize="25dp"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/id"
            android:textSize="25dp"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Order_Name:-"
            android:textSize="25dp"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/name"
            android:textSize="25dp"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Order_Quantity:-"
            android:textSize="25dp"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/qty"
            android:textSize="25dp"/>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Order_FullfilledBy:-"
            android:textSize="25dp"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/fill"
            android:textSize="25dp"/>

    </LinearLayout>

</LinearLayout>

java file

package com.example.myapplication1;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

public class Main2Activity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
    }
}

************************************************************************************************

OUTPUT :-

TE: 1:59 MyApplication1 Customer Name:-James Customer ID:- 123 Customer Address:- xyz SUBMIT O 0 0
  
| E1:59 MyApplication1 Customer OrderID:-| Order_Name:- Order_Quantity:- Order_FullfilledBy:- O 0 0

the E: 2:02 MyApplication1 Customer Name:-James21 Customer ID:- 12321 Customer Address:- xyz SUBMIT invalid CUSTOMER_NAME and CUSTOMER_ID O 0 0

the : 52:03 MyApplication1 Customer Name:-James Customer ID:- 12321 Customer Address:- xyz SUBMIT invalid Customer_ID

the | | | 2:04 MyApplication1 Customer Name:-James21 Customer ID:- 123 Customer Address:- xyz SUBMIT invalid Customer_Name
  
the | | | 2:04 MyApplication1 Customer Name:-James Customer ID:- Customer Address:- xyz SUBMIT all the details are not filled 0 0 0