Android 9 Development Cookbook - Third Edition

How to do it...

We're going to change the shape of the Toast to a square and create a custom layout to display an image and text message. Start by opening activity_main.xml and follow these steps:

1. Replace the existing <TextView> element with a <Button> as follows:

<Button    android:id="@+id/button"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="Show Toast"    android:onClick="showToast"    app:layout_constraintLeft_toLeftOf="parent"    app:layout_constraintRight_toRightOf="parent"    app:layout_constraintTop_toTopOf="parent" />

2. Create a new drawable resource file in the res/drawable folder named border_square.xml using the following code:

<?xml version="1.0" encoding="utf-8"?><layer-list ...