MainActivity.kt
package com.example.jetpack
import android.graphics.Color
import android.graphics.drawable.GradientDrawable
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_main.*
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// set image view image from drawable
imageView.setImageDrawable(drawCircleShape())
imageView2.setImageDrawable(drawCircleShape())
}
}
// method to create a circle drawable programmatically
private fun drawCircleShape():GradientDrawable{
return GradientDrawable().apply {
shape = GradientDrawable.OVAL
cornerRadii = floatArrayOf(0f, 0f, 0f, 0f, 0f, 0f, 0f, 0f)
setColor(Color.CYAN)
// make sure width and height are same for circle shape
// size is important, try to put same value as your view
setSize(50,50)
}
}
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"
tools:context=".MainActivity">
<ImageView
android:id="@+id/imageView"
android:layout_width="0dp"
android:layout_height="250dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
app:layout_constraintBottom_toTopOf="@+id/imageView2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_chainStyle="spread"
tools:srcCompat="@tools:sample/avatars" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="0dp"
android:layout_height="150dp"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:layout_marginBottom="16dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/imageView"
tools:srcCompat="@tools:sample/avatars" />
</androidx.constraintlayout.widget.ConstraintLayout>

- android kotlin - Bitmap mask
- android kotlin - Bitmap crop center
- android kotlin - Bitmap crop rectangle
- android kotlin - Circular bitmap with border
- android kotlin - Bitmap crop circular area
- android kotlin - Bitmap add border
- android kotlin - Draw rectangle on bitmap
- android kotlin - Draw line on bitmap
- android kotlin - Draw circle on bitmap
- android kotlin - ImageView grayscale filter
- android kotlin - Bitmap invert colors
- android kotlin - Bitmap color filter
- android kotlin - Drawable color programmatically
- android kotlin - Create GradientDrawable Programmatically
- android kotlin - ActionBar background color programmatically