Q. Write a program to display following toast MainAcitivity.

java
message.
activity_main.xml package com.example.practicalno15_1;
<?xml version="1.0" encoding="utf-8"?>
import android.os.Bundle;
<LinearLayout
import android.view.View;
xmlns:android="http://schemas.android.com/apk/r
import android.widget.Button;
es/android"
import android.widget.Toast;
xmlns:app="http://schemas.android.com/apk/res-
import
auto"
androidx.appcompat.app.AppCompatActivity;
xmlns:tools="http://schemas.android.com/tools"
public class MainActivity extends
android:layout_width="match_parent"
AppCompatActivity {
android:layout_height="match_parent"
Button b1;
tools:context=".MainActivity"
@Override
android:padding="20dp"
protected void onCreate(Bundle
android:gravity="center"
savedInstanceState) {
android:background="@color/white"
super.onCreate(savedInstanceState);
android:orientation="vertical">
setContentView(R.layout.activity_main);
b1=(Button) findViewById(R.id.btn);
<TextView
}
android:layout_width="wrap_content"
public void ShowToast(View v)
android:layout_height="wrap_content"
{
android:text="Hello World,Toast Message"
Toast.makeText(this, "Message for you \
android:textSize="20sp"
nYou have got Mail",
android:padding="20dp"
Toast.LENGTH_SHORT).show();
android:textColor="@color/black"
}
/>
}
<Button
android:id="@+id/btn"
android:text="Show Toast"
android:padding="20dp"
android:background="#ff00ff"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginTop="40dp"
android:textSize="20dp"
android:textStyle="bold"
android:onClick="ShowToast"
/>
</LinearLayout>
 xmlns:app="http://schemas.android.com/apk/re
s-auto"
xmlns:tools="http://schemas.android.com/tools
"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:padding="20dp"
android:background="@color/white"
android:orientation="vertical">

<CheckBox
android:id="@+id/chk_pizza"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layout_marginLeft="40dp"
android:padding="10dp"
android:text="Pizza"
android:textSize="20dp"/>
<CheckBox
android:id="@+id/chk_coffee"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="40dp"
android:padding="10dp"
android:layout_marginTop="20dp"
android:text="Coffee"
android:textSize="20dp"/>
<CheckBox
android:id="@+id/chk_burger"
android:layout_width="wrap_content"
Q. Write a program to display three android:layout_height="wrap_content"
checkboxes and one button named "Order "as android:layout_marginLeft="40dp"
shown below. Once you click on button it android:padding="10dp"
should toast different selected checkboxes android:layout_marginTop="20dp"
along with items individual and total price. android:text="Burger"
android:textSize="20dp"/>

activity_main.xml <Button
<?xml version="1.0" encoding="utf-8"?> android:layout_width="wrap_content"
<LinearLayout android:layout_height="wrap_content"
xmlns:android="http://schemas.android.com/apk/r android:id="@+id/btn"
es/android" android:text="ORDER"
android:onClick="onCheckboxclick"
 android:background="#ff00ff" total+=150;
android:textColor="@color/white" }
android:textStyle="bold"
android:padding="25dp" if(chkcoffee.isChecked())
android:layout_gravity="center" {
android:layout_marginTop="30dp" result+=chkcoffee.getText().toString()+"
android:textAlignment="center" Rs.70/-\n";
android:textSize="25dp"/> total+=70;
</LinearLayout> }
if(chkburger.isChecked())
MainActivity.java {
result+=chkburger.getText().toString()+"
package com.example.practicalno15_2; Rs.100/-\n";
total+=100;
import android.os.Bundle; }
import android.view.View;
import android.widget.CheckBox; if(result!=null)
import android.widget.Toast; {
result=result.substring(0,result.length()-1);
import Toast.makeText(this, result,
androidx.appcompat.app.AppCompatActivity; Toast.LENGTH_LONG).show();
Toast.makeText(this,"Total
public class MainActivity extends Amt="+total,Toast.LENGTH_SHORT).show();
AppCompatActivity { }
CheckBox chkpizza, chkburger,chkcoffee; }
@Override }
protected void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
chkpizza = (CheckBox)
findViewById(R.id.chk_pizza);
chkburger = (CheckBox)
findViewById(R.id.chk_burger);
chkcoffee = (CheckBox)
findViewById(R.id.chk_coffee);
}
public void onCheckboxclick(View v) {

String result="";
int total=0;
if(chkpizza.isChecked())
{
result+=chkpizza.getText().toString()+"
Rs.150/-\n";