Book Image

Android NDK Game Development Cookbook

Book Image

Android NDK Game Development Cookbook

Overview of this book

Android NDK is used for multimedia applications which require direct access to a system's resources. Android NDK is also the key for portability, which in turn provides a reasonably comfortable development and debugging process using familiar tools such as GCC and Clang toolchains. If your wish to build Android games using this amazing framework, then this book is a must-have.This book provides you with a number of clear step-by-step recipes which will help you to start developing mobile games with Android NDK and boost your productivity debugging them on your computer. This book will also provide you with new ways of working as well as some useful tips and tricks that will demonstrably increase your development speed and efficiency.This book will take you through a number of easy-to-follow recipes that will help you to take advantage of the Android NDK as well as some popular C++ libraries. It presents Android application development in C++ and shows you how to create a complete gaming application. You will learn how to write portable multithreaded C++ code, use HTTP networking, play audio files, use OpenGL ES, to render high-quality text, and how to recognize user gestures on multi-touch devices. If you want to leverage your C++ skills in mobile development and add performance to your Android applications, then this is the book for you.
Table of Contents (16 chapters)
Android NDK Game Development Cookbook
About the Authors
About the Reviewers

Storing application data

An application should be able to save its temporary and persistent data. Sometimes data should be written into a folder on external storage accessible by other applications. Let's find out how to get the path to this folder on Android and Windows, and do this in a portable way.

Getting ready

If your Android smartphone unmounts its external storage while connected to a desktop computer, make sure you disconnect it and wait for the storage to be remounted.

How to do it...

  1. We need to write some Java code to accomplish this task. First, we will ask the Environment for the external storage directory and its suffix, so we can distinguish our data from other applications:

    protected String GetDefaultExternalStoragePrefix()
      String Suffix = "/external_sd/Android/data/";
      return Environment.getExternalStorageDirectory().getPath() +Suffix + getApplication().getPackageName();


    The Suffix value can be chosen at will. You can use whatever value you desire.

  2. This is quite simple...