Text Style of a Substring - Android Studio - Java

We will change the style of some sub-strings of text of TextView using the ''SpannableString'' class
✓BOLD

✓ITALIC

✓BOLD_ITALIC 

✓STRIKE-THROUGH 

✓UNDERLINE

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/textView"
        android:textSize="18sp"
        android:textColor="#000"
        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.textstyles;

import android.graphics.Typeface;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.StrikethroughSpan;
import android.text.style.StyleSpan;
import android.text.style.UnderlineSpan;
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.textView);
        //The text to set in TextView
        String mText = "Our text can be BOLD and ITALIC and BOLD-ITALIC and STRIKE-THROUGH and UNDERLINE.";
        //Creating spannable string from normal string, we will use it to apply StyleSpan to substrings
        SpannableString mSpannableString = new SpannableString(mText);
        //styles to apply on substrings
        StyleSpan mBold = new StyleSpan(Typeface.BOLD); //bold style
        StyleSpan mItalic = new StyleSpan(Typeface.ITALIC); //italic style
        StyleSpan mBoldItalic = new StyleSpan(Typeface.BOLD_ITALIC); //bold italic style
        StrikethroughSpan mStrikeThrough = new StrikethroughSpan(); //strike through style
        UnderlineSpan mUnderlineSpan = new UnderlineSpan(); //underline style

        //applying styles to substrings
        mSpannableString.setSpan(mBold, 16, 20, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        mSpannableString.setSpan(mItalic, 25, 31, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        mSpannableString.setSpan(mBoldItalic, 36, 47, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        mSpannableString.setSpan(mStrikeThrough, 52, 66, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        mSpannableString.setSpan(mUnderlineSpan, 71, 80, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        //setting text to text view
        mTextView.setText(mSpannableString);
    }
}

Step 3: Run Project

Output

Check this tutorial for Kotlin