Text Color Of A Substring - Android Studio - Kotlin

We will change the color of some sub-strings of text of TextView using the ''SpannableString'' , and "ForeGroundColorSpan" classes using Android Studio IDE and Java language
✓RED
✓GREEN
✓BLUE
Check For Java

VIDEO

Step 1: Create a new Project or open new project

Step 2: Code

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=".MainActivity"><TextViewandroid:id="@+id/text_view"android:textSize="20sp"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="Hello World!"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintLeft_toLeftOf="parent"app:layout_constraintRight_toRightOf="parent"app:layout_constraintTop_toTopOf="parent" /></android.support.constraint.ConstraintLayout>

MainActivity.kt

package com.blogspot.atifsoftwares.textcolor_kotlinimport android.graphics.Colorimport android.support.v7.app.AppCompatActivityimport android.os.Bundleimport android.text.SpannableStringimport android.text.Spannedimport android.text.style.ForegroundColorSpanimport kotlinx.android.synthetic.main.activity_main.*class MainActivity : AppCompatActivity() {override fun onCreate(savedInstanceState: Bundle?) {super.onCreate(savedInstanceState)setContentView(R.layout.activity_main)//text to set in TextViewval mText = "Let's color some substrings: RED color , GREEN color , and BLUE color"//creating spannable string from normal string//we will use it to apply foregroundcolorspan to substringsval mSpannableString = SpannableString(mText)//color styles to apply on substringsval mRed = ForegroundColorSpan(Color.RED) //red colorval mGreen = ForegroundColorSpan(Color.GREEN) //green colorval mBlue = ForegroundColorSpan(Color.BLUE) //blue color//applying color styles to substringsmSpannableString.setSpan(mRed , 29 , 32 , Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)mSpannableString.setSpan(mGreen , 38 , 46 , Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)mSpannableString.setSpan(mBlue , 56 , 61 , Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)//setting text to the textviewtext_view.text = mSpannableString}}

Step 3: Run Project

Output