Book Image

Android 9 Development Cookbook - Third Edition

By : Rick Boyer
Book Image

Android 9 Development Cookbook - Third Edition

By: Rick Boyer

Overview of this book

The Android OS has the largest installation base of any operating system in the world. There has never been a better time to learn Android development to write your own applications, or to make your own contributions to the open source community! With this extensively updated cookbook, you'll find solutions for working with the user interfaces, multitouch gestures, location awareness, web services, and device features such as the phone, camera, and accelerometer. You also get useful steps on packaging your app for the Android Market. Each recipe provides a clear solution and sample code you can use in your project from the outset. Whether you are writing your first app or your hundredth, this is a book that you will come back to time and time again, with its many tips and tricks on the rich features of Android Pie.
Table of Contents (24 chapters)
Title Page
Copyright and Credits
Dedication
About Packt
Contributors
Preface
Index

Creating an options menu


Before we actually create and display a menu, let's look at a menu to see the end result. The following is a screenshot showing the menu section of the Chrome app:

The most obvious feature to note is that the menu will look different based on the screen size. By default, menu items will be added to the overflow menu—that's the menu you see when you press the three dots at the far right edge.

Menus are typically created in resource files using XML (like many other Android resources) stored in the res/menu directory, though they can also be created in code. To create a menu resource, use the <menu> element as shown:

<menu xmlns:android="http://schemas.android.com/apk/res/android"> 
</menu> 

The <item> element defines each individual menu item and is enclosed in the <menu> element. A basic menu item looks as follows:

<item  
    android:id="@+id/settings" 
    android:title="@string/settings" /> 

The most common <item> attributes...