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

Supporting multiple CPU architectures

Android NDK supports different CPU architectures such as ARMv5TE and ARMv7-based devices, x86, and MIPS (big-endian architecture). We can create fat binaries that can run on any of the supported platforms.

Getting ready

Find out the architecture of your Android-based device. You can do it using the adb command as follows:

>adb shell cat /proc/cpuinfo

How to do it...

The following are the two approaches to pick an appropriate set of CPU architectures:

  1. By default, the NDK will generate the code for ARMv5TE-based CPUs. Use the parameter APP_ABI in to select a different architecture, for example (use only one line from the following list):

    APP_ABI := armeabi-v7a
    APP_ABI := x86
    APP_ABI := mips
  2. We can specify multiple architectures to create a fat binary that will run on any of them through the following command:

    APP_ABI := armeabi armeabi-v7a x86 mips

There's more...

The main pitfall of the fat binaries is the resulting .apk size, as separate native code versions are compiled for each of the specified architectures. If your application heavily uses third-party libraries, the package size can become an issue. Plan your deliverables wisely.