Mobile Application Development Practical 15
Question 1
Write a program to display three checkboxes and one button as below. Once you click on the button it should display different checkboxes and total cost.
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:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<CheckBox
android:id="@+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="150dp"
android:layout_marginTop="70dp"
android:text="Pizza" />
<CheckBox
android:id="@+id/checkBox2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="150dp"
android:layout_marginTop="20dp"
android:text="Cofee" />
<CheckBox
android:id="@+id/checkBox3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="150dp"
android:layout_marginTop="20dp"
android:text="Burger" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="200dp"
android:text="Order" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>MainActivity.java
package com.example.practical15;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
CheckBox c1,c2,c3;
Button b;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
c1=findViewById(R.id.checkBox1);
c2=findViewById(R.id.checkBox2);
c3=findViewById(R.id.checkBox3);
b=findViewById(R.id.button);
View.OnClickListener cl=new View.OnClickListener() {
@Override
public void onClick(View view) {
float total=0;
String msg="";
if(c1.isChecked())
{
msg=msg+"\nPizza 150Rs";
total=total+150;
}
if(c2.isChecked())
{
msg=msg+"\nCofee 50Rs";
total=total+50;
}
if(c3.isChecked())
{
msg=msg+"\nBurger 100Rs";
total=total+100;
}
Toast.makeText(MainActivity.this,"Selected:"+msg+"\nTotal cost: "+total,Toast.LENGTH_LONG).show();
}
};
b.setOnClickListener(cl);
}
}Output
