How to check if CheckBox is checked in Android

In this android programming source code example, we are going to get the checked CheckBox value in Android.

You can copy and adopt this source code example to your android project without reinventing the wheel.

Below is a step by step source code to get the checked CheckBox value in Android.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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=".checkbox.CheckBox5">

    <TextView
        android:id="@+id/textView21"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="92dp"
        android:text="Checkbox value"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <CheckBox
        android:id="@+id/checkBox19"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="1dp"
        android:layout_marginLeft="1dp"
        android:layout_marginTop="106dp"
        android:text="CheckBox 1"
        app:layout_constraintStart_toStartOf="@+id/textView21"
        app:layout_constraintTop_toBottomOf="@+id/textView21" />

    <CheckBox
        android:id="@+id/checkBox20"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="19dp"
        android:layout_marginEnd="5dp"
        android:layout_marginRight="5dp"
        android:layout_weight="1"
        android:text="CheckBox 2"
        app:layout_constraintEnd_toEndOf="@+id/checkBox19"
        app:layout_constraintTop_toBottomOf="@+id/checkBox19" />

</android.support.constraint.ConstraintLayout>

MainActivity.java

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.Toast;

public class CheckBox5 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_check_box5);

        final CheckBox checkBox1, checkBox2;
        checkBox1 = findViewById(R.id.checkBox19);
        checkBox2 = findViewById(R.id.checkBox20);

        checkBox1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (checkBox1.isChecked()){
                    Toast.makeText(getApplicationContext(), "Checkbox 1 selected", Toast.LENGTH_SHORT).show();
                }
            }
        });

        checkBox2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (checkBox2.isChecked()){
                    Toast.makeText(getApplicationContext(), "Checkbox 2 Selected", Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}

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