Practical no. 11 Develop a program to implement Checkbox.
Practical related questions
1. Name the different methods at checkbox
Methods that can be used with checkbox are:
1. Public Boolean isChecked()
2. 2.public void setChecked(Boolean status)
2. List different attribute for checkbox.
1. android:id
2. android:checked
3. android:gravity
4. android:text
5. android:textColor
6. android:textSize
3. Write XML tag to create a checkbox named “Andriod”.
<checkbox
android:id=”@+id/checkbox”
android:layout_width=”wrap_content”
android:layout:height=”wrap_content”
android:checked=”true”
android:text=”Android”
/>
Program 1: Write a program to show five checkboxes and toast selected checkboxes.
XML Code:
<?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">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="30dp"
android:text="Click on Check Box"
android:textSize="30sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<CheckBox
android:id="@+id/c"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="30dp"
android:layout_marginLeft="30dp"
android:layout_marginTop="30dp"
android:text="C"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/textView" />
<CheckBox
android:id="@+id/cpp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp" android:text="C+
+" app:layout_constraintStart_toStartOf="@+id/c"
app:layout_constraintTop_toBottomOf="@+id/c" />
<CheckBox
android:id="@+id/Java"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:text="Java"
app:layout_constraintStart_toStartOf="@+id/cpp"
app:layout_constraintTop_toBottomOf="@+id/cpp" />
<CheckBox
android:id="@+id/Kotlin"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:text="Kotlin"
app:layout_constraintStart_toStartOf="@+id/Java"
app:layout_constraintTop_toBottomOf="@+id/Java" />
<CheckBox
android:id="@+id/python"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:text="python"
app:layout_constraintStart_toStartOf="@+id/Kotlin"
app:layout_constraintTop_toBottomOf="@+id/Kotlin" />
<CheckBox
android:id="@+id/PHP"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:text="PHP"
app:layout_constraintStart_toStartOf="@+id/python"
app:layout_constraintTop_toBottomOf="@+id/python" />
</androidx.constraintlayout.widget.ConstraintLayout>
Java Code:
package com.example.practical11;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
CheckBox c, cpp, java, kotlin, python, php;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
c = findViewById(R.id.c);
cpp = findViewById(R.id.cpp);
java = findViewById(R.id.Java);
kotlin = findViewById(R.id.Kotlin);
python = findViewById(R.id.python);
php = findViewById(R.id.PHP);
c.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (c.isChecked())
{
Toast.makeText(getApplicationContext(),c.getText(),Toast.LENGTH_SHORT).show();
}
}
});
cpp.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (cpp.isChecked())
{
Toast.makeText(getApplicationContext(),cpp.getText(),Toast.LENGTH_SHORT).show();
}
}
});
java.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (java.isChecked())
{
Toast.makeText(getApplicationContext(),java.getText(),Toast.LENGTH_SHORT).show();
}
}
});
kotlin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (kotlin.isChecked())
{
Toast.makeText(getApplicationContext(),kotlin.getText(),Toast.LENGTH_SHORT).show();
}
}
});
python.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (python.isChecked())
{
Toast.makeText(getApplicationContext(),python.getText(),Toast.LENGTH_SHORT).show();
}
}
});
php.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (php.isChecked())
{
Toast.makeText(getApplicationContext(),php.getText(),Toast.LENGTH_SHORT).show();
}
}
});
}
}
Output:
