Android Studio Write a program to display the n terms of even number and their sum

 

Check even number and their sum - XML COD

     
 
<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"
    tools:context=".Jor_Jogpol"
    android:orientation="vertical"
    android:background="#E4EEED"
    >

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar5"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:background="@drawable/bottom_curved"
        app:title="Check even number and their sum"
        android:elevation="4dp"
        app:titleTextColor="@color/white"
        />


    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/Golam"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginRight="10dp"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="10dp"
        app:errorTextColor="#FF0000"
        app:hintTextColor="#0038FF"
        android:hint="input number of terms"
        app:boxStrokeColor="#000DFF"
        android:textColorHint="@color/black"
        app:endIconMode="clear_text"
        app:endIconTint="#FF0000"
        >

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/EdJor_polo"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="numberDecimal"
            android:textColor="@color/black"
            />


    </com.google.android.material.textfield.TextInputLayout>




        <Button
            android:id="@+id/Buttonpol"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:backgroundTint="#1100FF"
            android:text="Click Here"
            android:textColor="#FFFFFF"
            android:textSize="20sp"
            android:layout_marginRight="110dp"
            android:layout_marginLeft="110dp"
            android:layout_marginTop="10dp"
            />




    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="400dp"
        >

       <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:layout_margin="20dp"
            >

            <TextView
                android:id="@+id/evenNumbersTextView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textSize="25sp"
                android:textColor="@color/black"
                android:layout_marginLeft="40dp"
                android:layout_marginRight="40dp"
                android:visibility="gone"
                />

            <TextView
                android:id="@+id/sumTextView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textSize="25sp"
                android:textColor="#0F25EA"
                android:layout_marginLeft="40dp"
                android:layout_marginRight="40dp"
                android:visibility="gone"
                />


            <com.airbnb.lottie.LottieAnimationView
                android:id="@+id/AnimisonLotti1"
                android:layout_width="match_parent"
                android:layout_height="400dp"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.498"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                android:layout_gravity="center"
                app:lottie_autoPlay="true"
                app:lottie_loop="true"
                app:lottie_rawRes="@raw/search"
                android:visibility="visible"
                />



        </LinearLayout>

    </ScrollView>




</LinearLayout>


        

  Calculating and parsing - JAVA CODE

package com.arah.jobayerahmed;

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

import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.TextView;

import com.airbnb.lottie.LottieAnimationView;
import com.google.android.material.textfield.TextInputEditText;
import com.google.android.material.textfield.TextInputLayout;

public class Jor_Jogpol extends AppCompatActivity {
    TextView evenNumbersTextView, sumTextView;
    Button Buttonpol;
    TextInputEditText EdJor_polo;
    TextInputLayout Golam;
    Animation AHomea1,AHomea2;
    LottieAnimationView AnimisonLotti1;

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

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar5);
        setSupportActionBar(toolbar);
        if (getSupportActionBar() != null) {
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            getSupportActionBar().setDisplayShowHomeEnabled(true);
        }

        EdJor_polo = findViewById(R.id.EdJor_polo);
        Buttonpol = findViewById(R.id.Buttonpol);
        Golam = findViewById(R.id.Golam);
        AnimisonLotti1 = findViewById(R.id.AnimisonLotti1);


        evenNumbersTextView = findViewById(R.id.evenNumbersTextView);
        sumTextView = findViewById(R.id.sumTextView);

        AHomea1 = AnimationUtils.loadAnimation(this, R.anim.home1);
        AHomea2 = AnimationUtils.loadAnimation(this, R.anim.home3);

        Golam.setAnimation(AHomea1);
        Buttonpol.setAnimation(AHomea2);

        Buttonpol.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                String hi = EdJor_polo.getText().toString();


                if (hi.isEmpty()){
                    EdJor_polo.setError("Enter Number");
                }else {

                    int n = Integer.parseInt(hi);


                    int sum = 0;
                    StringBuilder evenNumbersBuilder = new StringBuilder();
                    for (int i = 1; i <= n; i++) {
                        int evenNumber = 2 * i;
                        evenNumbersBuilder.append(evenNumber).append(" ");
                        sum += evenNumber;
                    }

                    AnimisonLotti1.setVisibility(View.GONE);
                    evenNumbersTextView.setVisibility(View.VISIBLE);
                    sumTextView.setVisibility(View.VISIBLE);
                    evenNumbersTextView.setText("Even numbers: " + evenNumbersBuilder.toString());
                    sumTextView.setText("Sum of even numbers: " + sum);


                }

            }
        });






    }

    @Override
    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            finish();
        }
        return super.onOptionsItemSelected(item);
    }




}