Part 34 : Spannable String And Global Style

 themes.xml : 

<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Theme.SpannableLearning" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/purple_500</item>
        <item name="colorPrimaryVariant">@color/purple_700</item>
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/teal_200</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor">?attr/colorPrimaryVariant</item>
        <!-- Customize your theme here. -->
    </style>


    <style name="new_text_view" parent="@android:style/Widget.TextView">
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_height">wrap_content</item>
        <item name="android:textSize">20dp</item>
    </style>


</resources>

MainActivity.java : 

package first.learn.spannablelearning;

import androidx.appcompat.app.AppCompatActivity;

import android.content.res.ColorStateList;
import android.graphics.Color;
import android.graphics.Typeface;
import android.os.Bundle;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.style.BackgroundColorSpan;
import android.text.style.ForegroundColorSpan;
import android.text.style.RelativeSizeSpan;
import android.text.style.StyleSpan;
import android.text.style.TextAppearanceSpan;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    TextView txtForeground, txtBackground, txtSize, txtStyle, txtAppearance  ;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        txtForeground = (TextView) findViewById(R.id.txtForeground);
        txtBackground = (TextView)findViewById(R.id.txtBackground);
        txtSize = (TextView)findViewById(R.id.txtSize);
        txtStyle = (TextView)findViewById(R.id.txtStyle);
        txtAppearance = (TextView)findViewById(R.id.txtAppearance);

        String one = "This is ForeGround Span";
        Spannable spOne = new SpannableString(one);
        spOne.setSpan(new ForegroundColorSpan(Color.RED),8,17, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE );

        txtForeground.setText(spOne);


        String two = "This is Background Color Span And Insert";

        SpannableStringBuilder spTwo = new SpannableStringBuilder(two);

        spTwo.setSpan(new BackgroundColorSpan(Color.BLUE), 8, 24, Spanned.SPAN_EXCLUSIVE_INCLUSIVE );
        spTwo.setSpan(new ForegroundColorSpan(Color.WHITE), 8, 24, Spanned.SPAN_EXCLUSIVE_INCLUSIVE);
        spTwo.insert(25, "Blue");

        txtBackground.setText(spTwo);


        String three = "This is Size Span";
        Spannable spThree = new SpannableString(three);

        spThree.setSpan(new RelativeSizeSpan(1.5f), 8, 12, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        spThree.setSpan(new ForegroundColorSpan(Color.RED),8,12, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE );


        txtSize.setText(spThree);



        String four = "This is Style Span";
        Spannable spFour = new SpannableString(four);
        spFour.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 8, 13, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        txtStyle.setText(spFour);


        String five = "This is Text Appearance";
        Spannable spFive =  new SpannableString(five);
        ColorStateList blueColor = new ColorStateList(new int[][]{new int[]{}}, new int[]{Color.BLUE});
        TextAppearanceSpan span = new TextAppearanceSpan("serif", Typeface.BOLD, 70, blueColor, null );

        spFive.setSpan(span, 8, 23, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        txtAppearance.setText(spFive);



    }
}

activity_main.xml : 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    android:layout_margin="16dp">

    <TextView
        style="@style/new_text_view"
        android:text="ForeGround Span"
        android:id="@+id/txtForeground"
     />


    <TextView
        style="@style/new_text_view"
        android:text="BackGround Span"
        android:id="@+id/txtBackground"
        />



    <TextView
        style="@style/new_text_view"
        android:text="Size Span"
        android:id="@+id/txtSize"
        />


        <TextView
        style="@style/new_text_view"
        android:text="Style Span"
        android:id="@+id/txtStyle"
        />



    <TextView
        style="@style/new_text_view"
        android:text="Text Appearance  Span"
        android:id="@+id/txtAppearance"
        />

</LinearLayout>