Text Color of a Substring - Android Studio - Java

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 Kotlin

VIDEO

Step 1: Create a new project OR Open your 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">

    <TextView
        android:id="@+id/text_view"
        android:textSize="25sp"
        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.java

package com.blogspot.atifsoftwares.textcolor_java;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.ForegroundColorSpan;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

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

        //TextView
        TextView mTextView = findViewById(R.id.text_view);

        //text to set in TextView
        String 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 forgroundcolorspan to substring
        SpannableString mSpannableString = new SpannableString(mText);

        //color styles to apply on substrings
        ForegroundColorSpan mRed = new ForegroundColorSpan(Color.RED); //red color
        ForegroundColorSpan mGreen = new ForegroundColorSpan(Color.GREEN); //green color
        ForegroundColorSpan mBlue = new ForegroundColorSpan(Color.BLUE); //blue color

        //applying color styles to substrings
        mSpannableString.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 TextView
        mTextView.setText(mSpannableString);
    }
}

Step 3: Run Project

Output