MainActivity.kt
package com.example.jetpack
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.os.Bundle
import android.text.style.ImageSpan
import androidx.appcompat.app.AppCompatActivity
import androidx.core.graphics.scale
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 = ("Lorem Ipsum is simply dummy text of the printing and" +
" typesetting industry. Lorem Ipsum has been the industry's" +
" standard dummy text ever since the 1500s, when an unknown" +
" printer took a galley of type and scrambled it" +
" to make a type specimen book.").toSpannable()
// Get icon from drawable resource
var icon:Bitmap = BitmapFactory.decodeResource(resources,R.drawable.cfsuman)
// Scale bitmap using android kotlin core ktx function
icon = icon.scale(100,100,false)
// Image span from drawable icon
text[49..50] = ImageSpan(this,R.drawable.ic_weekend)
// Another image span from bitmap
text[89..90] = ImageSpan(this,icon)
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: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()
}
}

- kotlin ktx - MaskFilterSpan blur
- kotlin ktx - IconMarginSpan
- kotlin ktx - DynamicDrawableSpan
- kotlin ktx - LeadingMarginSpan
- kotlin ktx - Scale bitmap
- kotlin ktx - Scale bitmap keep aspect ratio
- kotlin ktx - View to bitmap
- kotlin ktx - View padding programmatically
- kotlin ktx - View margin programmatically
- kotlin ktx - Drawable to bitmap