Android Programming: The Big Nerd Ranch Guide

An Abstract Activity for Hosting a Fragment

In a moment, you will create the CrimeListActivity class that is designed to host a CrimeListFragment. First, let’s set up a view for CrimeListActivity.

A generic fragment-hosting layout

For CrimeListActivity, you can simply reuse the layout defined in activity_crime.xml (Listing 9.7). This layout provides a FrameLayout as a container view for a fragment, which is then named in the activity’s code.

Listing 9.7  activity_crime.xml is already generic

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/fragmentContainer"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  />

Because activity_crime.xml does ...