MainActivity.kt
package com.example.jetpack
import android.content.Context
import android.graphics.*
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_main.*
import java.io.IOException
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// get bitmap from assets
val bitmap: Bitmap? = assetsToBitmap("flower.jpg")
// set image views image from assets
bitmap?.apply {
imageView.setImageBitmap(this)
imageView2.setImageBitmap(this)
}
// color filter (set tint) image view image programmatically
imageView2.setColorFilter(
Color.parseColor("#9EFD38"),
PorterDuff.Mode.MULTIPLY
)
// show the color filter details in text view
textView.text = "Tint #9EFD38 and Porter Duff Mode Multiply"
}
}
// extension function to get bitmap from assets
fun Context.assetsToBitmap(fileName:String): Bitmap?{
return try {
with(assets.open(fileName)){
BitmapFactory.decodeStream(this)
}
} catch (e: IOException) { null }
}
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">
<ImageView
android:id="@+id/imageView"
android:layout_width="0dp"
android:layout_height="250dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:srcCompat="@tools:sample/avatars" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="0dp"
android:layout_height="250dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/imageView"
tools:srcCompat="@tools:sample/avatars" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:text="ImageView Tint"
app:layout_constraintEnd_toEndOf="@+id/imageView2"
app:layout_constraintStart_toStartOf="@+id/imageView2"
app:layout_constraintTop_toBottomOf="@+id/imageView2" />
</androidx.constraintlayout.widget.ConstraintLayout>
- android kotlin - ImageView rounded top corners programmatically
- android kotlin - ImageView rounded corners programmatically
- android kotlin - ImageView set image from drawable
- android kotlin - ImageView set image from url
- android kotlin - Get battery percentage programmatically
- android kotlin - Get battery level programmatically
- android kotlin - Get battery voltage programmatically
- android kotlin - Canvas draw line
- android kotlin - Canvas draw arc between two points
- android kotlin - Canvas draw path
- android kotlin - Canvas draw text inside circle
- android kotlin - Canvas draw text wrap