How to change CheckBox text size in Android

In this android programming source code example, we are going to change CheckBox text size 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 change CheckBox text size 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.CheckBox4">

    <TextView
        android:id="@+id/textView9"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="18dp"
        android:layout_marginRight="18dp"
        android:layout_marginBottom="106dp"
        android:text="Change CheckBox Text size"
        app:layout_constraintBottom_toTopOf="@+id/checkBox3"
        app:layout_constraintEnd_toEndOf="@+id/checkBox3" />

    <CheckBox
        android:id="@+id/checkBox3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="318dp"
        android:textSize="25sp"
        android:text="CheckBox"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

MainActivity.java

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

import com.inducesmile.inducesmile_button.R;

public class CheckBox4 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_check_box4);

        // programmatically
        CheckBox checkBox = (CheckBox)findViewById(R.id.checkBox3);  
        checkBox.setTextSize(30);    
    }
}

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