Android 9 Development Cookbook - Third Edition

How to do it...

First, we need to add the SwipeRefreshLayout widget and ListView to the activity layout, then we will implement the refresh listener in the Java code. Here are the detailed steps:

1. Open activity_main.xml and replace the existing constraint layout with the following:

<?xml version="1.0" encoding="utf-8"?><RelativeLayout 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">    <android.support.v4.widget.SwipeRefreshLayout        android:id="@+id/swipeRefresh"        android:layout_width="match_parent"        android:layout_height="match_parent" ...