kabilselvam / explicitintent-mad

Ex.No:4 To create a two screens , first screen will take one number input from user. After click on Factorial button, second screen will open and it should display factorial of the same number using Explicit Intents.

AIM:

To create a two screens , first screen will take one number input from user. After click on Factorial button, second screen will open and it should display factorial of the same number using Explicit Intents.

EQUIPMENTS REQUIRED:

Latest Version Android Studio

ALGORITHM:

Step 1: Create a New Project in Android Studio

Step 2: Working with the activity_main.xml File

Step 3: Working with the MainActivity File

Step 4: Working with the activity_main2.xml File

Step 5: Working with the MainActivity2 File

PROGRAM:

/*
Program to print the text “ExplicitIntent”.
Developed by: Kabil S
Registeration Number : 212222040067
*/

In activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/linearLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#BB9DF1"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/input_field"
        android:layout_width="252dp"
        android:layout_height="48dp"
        android:hint="Enter a number"
        android:inputType="number"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/factorial_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#3F51B5"
        android:text="FIND FACTORIAL"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/input_field" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="217dp"
        android:layout_height="46dp"
        android:text="FACTORIAL FINDER"
        android:textColor="#673AB7"
        android:textSize="24sp"
        android:textStyle="bold|italic"
        app:layout_constraintBottom_toTopOf="@+id/input_field"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

In MainActivity.java

package com.example.explicitintent;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

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

        // Get references to UI elements
        final EditText inputField = findViewById(R.id.input_field);
        Button factorialButton = findViewById(R.id.factorial_button);

        // Set up the "Explicit Intent" button
        factorialButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Get the input number from the text field
                int inputNumber = Integer.parseInt(inputField.getText().toString());

                // Create an Intent to start the FactorialActivity
                Intent explicitIntent = new Intent(MainActivity.this, MainActivity2.class);
                // Pass the input number as an extra
                explicitIntent.putExtra("input_number", inputNumber);

                // Start the FactorialActivity
                startActivity(explicitIntent);
            }
        });
    }
}

In activity_main2.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/linearLayout2"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#BB9DF1"
    tools:context=".MainActivity2">

    <TextView
        android:id="@+id/result_text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#9C27B0"
        android:textSize="34sp"
        android:textStyle="bold|italic"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.498"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.3" />

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="BACK"
        android:onClick="back"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/result_text_view" />

</androidx.constraintlayout.widget.ConstraintLayout>

In MainActivity2.java

package com.example.explicitintent;


import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import java.math.BigInteger;

public class MainActivity2 extends AppCompatActivity {

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

        // Get the input number from the Intent extra
        int inputNumber = getIntent().getIntExtra("input_number", 0);

        // Calculate the factorial of the input number using BigInteger
        BigInteger factorial = BigInteger.ONE;
        for (int i = 2; i <= inputNumber; i++) {
            factorial = factorial.multiply(BigInteger.valueOf(i));
        }

        // Display the factorial result in a TextView
        TextView resultTextView = findViewById(R.id.result_text_view);
        resultTextView.setText("Factorial of " + inputNumber + " is: " + factorial);
    }

    public void back(View view) {
        Intent i = new Intent(getApplicationContext(), MainActivity.class);
        startActivity(i);
    }
}

OUTPUT

RESULT

Thus a Simple Android Application create a Explicit Intents using Android Studio is developed and executed successfully.