Develop an android application to show five checkboxes and toast selected checkboxes

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:padding="20dp">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="@string/msg"
        style="@style/TextAppearance.AppCompat.Large"
        android:layout_margin="10dp"
        android:textStyle="bold"/>

    <CheckBox
        android:id="@+id/chkAndroid"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/android"
        style="@style/TextAppearance.AppCompat.Headline"/>

    <CheckBox
        android:id="@+id/chkJava"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/java"
        style="@style/TextAppearance.AppCompat.Headline"/>

    <CheckBox
        android:id="@+id/chkPhp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/php"
        style="@style/TextAppearance.AppCompat.Headline"/>

    <CheckBox
        android:id="@+id/chkCpp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/cpp"
        style="@style/TextAppearance.AppCompat.Headline"/>

    <CheckBox
        android:id="@+id/chkC"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/c"
        style="@style/TextAppearance.AppCompat.Headline"/>

    <Button android:id="@+id/btnDisplay"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Display"
        android:layout_marginTop="20dp"
        android:onClick="showSelected"/>

</LinearLayout>

MainActivity.java

package com.example.checkboxdemo;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.CheckBox;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private CheckBox chkAndroid, chkJava, chkPhp, chkCpp, chkC;

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        chkAndroid = findViewById(R.id.chkAndroid);
        chkJava = findViewById(R.id.chkJava);
        chkPhp = findViewById(R.id.chkPhp);
        chkCpp = findViewById(R.id.chkCpp);
        chkC = findViewById(R.id.chkC);
    }

    public void showSelected(View view) {

        String selected = "You selected: \n";

        if(chkAndroid.isChecked())
            selected += "Android";

        if(chkJava.isChecked())
            selected += "\nJava";

        if(chkPhp.isChecked())
            selected += "\nPHP";

        if(chkCpp.isChecked())
            selected += "\nCPP";

        if(chkC.isChecked())
            selected += "\nC";

        Toast.makeText(MainActivity.this, selected, Toast.LENGTH_SHORT).show();
    }
}

strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">CheckBoxApp</string>
    <string name="msg">Select your favourite programming languages</string>
    <string name="android">Android</string>
    <string name="java">Java</string>
    <string name="php">PHP</string>
    <string name="cpp">CPP</string>
    <string name="c">C</string>
</resources>

OUTPUT