MainActivity.kt
package com.cfsuman.kotlintutorials
import android.os.Bundle
import android.text.Spannable
import android.text.SpannableString
import android.text.style.AbsoluteSizeSpan
import android.text.style.RelativeSizeSpan
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// If the support action bar is available
supportActionBar?.apply {
// Text for Action bar title
val titleText = " ActionBar Title Spannable"
// Initialize a Spannable string instance
val spannableString = SpannableString(titleText)
// Scale title text size relative to original size
// Increase title text size / font size
val relativeSizeSpan = RelativeSizeSpan(1.2F)
spannableString.setSpan(
relativeSizeSpan,
0,
titleText.length,
Spannable.SPAN_INCLUSIVE_EXCLUSIVE
)
// Show spannable title on action bar
title = spannableString
// Another way to change title text size
val anotherTitle = " Title By Absolute Size Span"
val anotherSpannableSting = SpannableString(anotherTitle)
// Absolute size span
val absoluteSizeSpan = AbsoluteSizeSpan(
14, // size in dip
true // dip true
)
anotherSpannableSting.setSpan(
absoluteSizeSpan,
0,
anotherSpannableSting.length,
Spannable.SPAN_INCLUSIVE_INCLUSIVE
)
// Comment and uncomment below line to test the effect
//title = anotherSpannableSting
// Show logo on action bar
setDisplayShowHomeEnabled(true)
setDisplayUseLogoEnabled(true)
setLogo(R.drawable.ic_action_help)
}
}
}
activity_main.xml
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/rootLayout"
android:background="#DCDCDC" />


- android kotlin - ActionBar title color
- android kotlin - Display logo on ActionBar
- android kotlin - ActionBar title style
- android kotlin - ActionBar title padding left
- android kotlin - Get ActionBar height
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- android kotlin - Popup menu with icons
- android kotlin - Menu add remove update item programmatically
- android kotlin - Menu icon color
- android kotlin - Menu overflow icon
- android kotlin - CalendarView get selected date
- android kotlin - CalendarView set date
- android kotlin - CalendarView example
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