Sunday, July 26, 2020

android kotlin - TextView add Hyperlink programmatically

MainActivity.kt

package com.example.jetpack

import android.os.Bundle
import android.text.method.LinkMovementMethod
import androidx.appcompat.app.AppCompatActivity
import androidx.core.text.HtmlCompat
import kotlinx.android.synthetic.main.activity_main.*


class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // string inside html markup objects
        val htmlString = "Hyperlink inside TextView.<br />" +
                "<a href='https://developer.android.com/'>developer.android.com</a>"

        // spanned is the interface for text that has
        // markup objects attached to ranges of it
        val spanned = HtmlCompat.fromHtml(
            htmlString, // source
            HtmlCompat.FROM_HTML_MODE_LEGACY // flags
        )

        // LinkMovementMethod traverses links in the text buffer and scrolls
        // if necessary. Supports clicking on links with DPad Center or Enter.
        textView.movementMethod = LinkMovementMethod.getInstance()

        // finally, show text view text with html hyperlink
        textView.text = spanned
    }
}
activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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:id="@+id/constraintLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#EDEAE0"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="25dp"
        android:textSize="30sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:text="TextView" />

</androidx.constraintlayout.widget.ConstraintLayout>