Book Image

Mastering Android NDK

Book Image

Mastering Android NDK

Overview of this book

Android NDK is used for multimedia applications that require direct access to system resources. NDK is also the key for portability, which in turn allows a reasonably comfortable development and debugging process using familiar tools such as GCC and Clang toolchains. This is a hands-on guide to extending your game development skills with Android NDK. The book takes you through many clear, step-by-step example applications to help you further explore the features of Android NDK and some popular C++ libraries and boost your productivity by debugging the development process. Through the course of this book, you will learn how to write portable multi-threaded native code, use HTTP networking in C++, play audio files, use OpenGL ES 3, and render high-quality text. Each chapter aims to take you one step closer to building your application. By the end of this book, you will be able to create an engaging, complete gaming application.
Table of Contents (17 chapters)
Mastering Android NDK
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Android licensing in native applications


The major part of this chapter has been dedicated to low-level networking capabilities in C++, which are crucial to writing multiplatform code. However, it would not be fair to omit some Android-specific things from this chapter. Let's go with licensing mechanism and learn how to move it into the C++ code. For this one, we will need to interact with Java code heavily, since all the licensing facilities are Java-only.

Note

Here, we assume that you are already familiar with how to do the license checking in Java. The official Google documentation can be found here:

http://developer.android.com/google/play/licensing/setting-up.html

http://developer.android.com/google/play/licensing/adding-licensing.html

The source code of this sample is located in the 4_Licensing folder. First, let's define the basic constants, the values should match those from the Android SDK. See the License.h file:

  constexpr int LICENSED = 0x0100;
  constexpr int NOT_LICENSED = 0x0231...