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"
android:padding="24dp"
tools:context=".MainActivity"
android:background="#F0F8FF">
<!--
ImageView
Displays an arbitrary image, such as an icon.
The ImageView class can load images from various sources.
-->
<!--
android:src
Sets a drawable as the content of this ImageView.
May be a reference to another resource,
in the form "@[+][package:]type:name"
or to a theme attribute in the form "?[package:][type:]name".
May be a color value, in the form of "#rgb", "#argb",
"#rrggbb", or "#aarrggbb".
This corresponds to the global attribute resource symbol src.
-->
<!-- Set ImageView image in XML layout -->
<ImageView
android:id="@+id/iv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@drawable/flower6"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>
