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Android Application Development Cookbook

Android Application Development Cookbook

By : Boyer, Mew
4.5 (6)
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Android Application Development Cookbook

Android Application Development Cookbook

4.5 (6)
By: Boyer, Mew

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! This “cookbook” will make it easy for you to jump to a topic of interest and get what you need to implement the feature in your own application. If you are new to Android and learn best by “doing,” then this book will provide many topics of interest. Starting with the basics of Android development, we move on to more advanced concepts, and we’ll guide you through common tasks developers struggle to solve. The first few chapters cover the basics including Activities, Layouts, Widgets, and the Menu. From there, we cover fragments and data storage (including SQLite), device sensors, the camera, and GPS. Then we move on more advanced topics such as graphics and animation (including OpenGL), multi-threading with AsyncTask, and Internet functionality with Volley. We’ll also demonstrate Google Maps and Google Cloud Messaging (also known as Push Notifications) using the Google API Library. Finally, we’ll take a look at several online services designed especially for Android development. Take your application big-time with full Internet web services without having to become a server admin by leveraging the power of Backend as a Service (BaaS) providers.
Table of Contents (17 chapters)
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16
Index

Passing data between Fragments


Often, the need arises to pass information between the Fragments. An email application serves as a classic example. It's common to have the list of emails in one Fragment, and show the email details in another Fragment (this is commonly referred to as a Master/Detail pattern). Fragments make creating this pattern easier because we only have to code each Fragment once, then we can include them in different layouts. We can easily have a single Fragment in a portrait layout with the ability to swap out the master Fragment with the detail Fragment when an email is selected. We can also create a two-panel layout where both the list and detail Fragments are side-by-side. Either way, when the user clicks the email in the list, the email opens up in the detail panel. This is when we need to communicate between two Fragments.

Since one of the primary goals of Fragments is that they be completely self-contained, direct communication between Fragments is discouraged, and...

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