MainActivity.kt
package com.example.jetpack
import android.graphics.Color
import android.graphics.Typeface
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.text.Layout
import android.text.style.*
import androidx.core.text.set
import androidx.core.text.toSpannable
import kotlinx.android.synthetic.main.activity_main.*
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val text = ("Left aligned text.\nCenter aligned text.\nRight aligned text").toSpannable()
// Set alignment span
text[0..18] = AlignmentSpan.Standard(Layout.Alignment.ALIGN_NORMAL)
text[0..18] = StyleSpan(Typeface.BOLD)
text[18..39] = AlignmentSpan.Standard(Layout.Alignment.ALIGN_CENTER)
text[18..39] = ForegroundColorSpan(Color.RED)
text[39..text.length] = AlignmentSpan.Standard(Layout.Alignment.ALIGN_OPPOSITE)
text[39..text.length] = ForegroundColorSpan(Color.BLUE)
textView.text = text
}
}
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: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_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
android:padding="8dp"
android:text=""
android:textAppearance="@style/TextAppearance.AppCompat.Large"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
build.gradle dependencies[add]
// android ktx
implementation 'androidx.core:core-ktx:1.2.0'
build.gradle [add]
android {
kotlinOptions {
jvmTarget = JavaVersion.VERSION_1_8.toString()
}
}

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