How to create multiple styles inside a TextView on Android using Kotlin?

This example demonstrates how to create multiple styles inside a TextView on Android using Kotlin.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   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:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="150dp"
      android:padding="4dp"
      android:textAlignment="center"
      android:textSize="16sp" />
   <TextView
      android:id="@+id/textView2"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_below="@+id/textView"
      android:layout_marginTop="70dp"
      android:padding="4dp"
      android:textAlignment="center"
      android:textSize="16sp" />
   <TextView
      android:id="@+id/textView3"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_below="@+id/textView2"
      android:layout_marginTop="70dp"
      android:padding="4dp"
      android:textAlignment="center"
      android:textSize="16sp" />
</RelativeLayout>

Step 3 − Add the following code to src/MainActivity.kt

import android.os.Bundle
import android.text.Html
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
@Suppress("DEPRECATION")
class MainActivity : AppCompatActivity() {
   private lateinit var textView: TextView
   private lateinit var textView2: TextView
   lateinit var textView3: TextView
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      textView = findViewById(R.id.textView)
      textView2 = findViewById(R.id.textView2)
      textView3 = findViewById(R.id.textView3)
      textView.text = Html.fromHtml(
         "Multiple style inside android textView: bold text: "
               + "<b>bold text</b>, italic text: <i>italic text</i>, small font: <small>small "
               + "text</small>, "
               + "font color: <font color=\"blue\">Text Color</font>, "
               + "font color with bold text: <fontcolor=\"green\"><b>Bold with font "
               + "color</b></font>"
         )
         val text = Html.fromHtml(
            "Multiple style inside android textView: bold text: "
               + "<b>bold text</b>, "
               + "italic text: <i>italic text</i>, small font: <small>small text</small>, font "
               + "color: <font color=\"blue\">Text Color</font>, "
               + "font color with bold text: <fontcolor=\"green\"><b>Bold with font "
               + "color</b></font>"
         )
         textView2.text = text
         textView3 = findViewById(R.id.textView3)
         textView3.text = Html.fromHtml(getString(R.string.textStyle))
   }
}

Step 4 − Open res/values/strings.xml and add the following code −

<resources>
   <string name="textStyle">
   <![CDATA[
      Multiple style inside android textView: bold text: <b>bold
      text</b>, italicText text: <i>italic text</i>, small font:
      <small>small text</small>,
      font color: <font color="blue"<Text Color</font<, font
      color with bold text: <font color="green"><b>Bold with font
      color</b></font>
   ]]>
   </string>
</resources>

Step 5 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.q11">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run icon  from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen.

Click here to download the project code.

Azhar

Published on 29-Sep-2020 16:47:32