How to set the part of the Android text view as clickable in Kotlin?

This example demonstrates how to set the part of the Android text view as clickable in 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:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="50dp"
      android:text="Tutorials Point"
      android:textAlignment="center"
      android:textColor="@android:color/holo_green_dark"
      android:textSize="32sp"
      android:textStyle="bold" />
   <TextView
      android:id="@+id/textView"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerInParent="true"
      android:textSize="16sp"
      android:textStyle="bold|italic" />
</RelativeLayout>

Step 3 − Add the following code to MainActivity.kt

import android.os.Bundle
import android.text.SpannableString
import android.text.Spanned
import android.text.method.LinkMovementMethod
import android.text.style.ClickableSpan
import android.view.View
import android.widget.TextView
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
   lateinit var textView: TextView
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      textView = findViewById(R.id.textView)
      val text = "I want THIS and THIS to be CLICKED"
      val spannableString = SpannableString(text)
      val clickableSpan1: ClickableSpan = object : ClickableSpan() {
         override fun onClick(widget: View?) {
            Toast.makeText(this@MainActivity, "THIS", Toast.LENGTH_SHORT).show()
         }
      }
      val clickableSpan2: ClickableSpan = object : ClickableSpan() {
         override fun onClick(widget: View?) {
            Toast.makeText(this@MainActivity, "THIS", Toast.LENGTH_SHORT).show()
         }
      }
      val clickableSpan3: ClickableSpan = object : ClickableSpan() {
         override fun onClick(widget: View?) {
            Toast.makeText(this@MainActivity, "Clicked", Toast.LENGTH_SHORT).show()
         }
      }
      spannableString.setSpan(clickableSpan1, 7, 11, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
      spannableString.setSpan(clickableSpan2, 16, 20, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
      spannableString.setSpan(clickableSpan3, 27, 34, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
      textView.setText(spannableString, TextView.BufferType.SPANNABLE)
      textView.movementMethod = LinkMovementMethod.getInstance()
   }
}

Step 4 − 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="app.com.kotlipapp">
   <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 21-Apr-2020 13:03:37