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  • Book Overview & Buying Android NDK Beginner`s Guide - Second Edition
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Android NDK Beginner`s Guide - Second Edition

Android NDK Beginner`s Guide - Second Edition

By : Ratabouil
3.6 (8)
Buy this Book
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Android NDK Beginner`s Guide - Second Edition

Android NDK Beginner`s Guide - Second Edition

3.6 (8)
By: Ratabouil
Buy this Book

Overview of this book

Are you an Android Java programmer who needs more performance? Are you a C/C++ developer who doesn’t want to bother with the complexity of Java and its out-of-control garbage collector? Do you want to create fast intensive multimedia applications or games? If you’ve answered yes to any of these questions then this book is for you. With some general knowledge of C/C++ development, you will be able to dive headfirst into native Android development.
Table of Contents (13 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Sections
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Time for action – heading
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Conventions
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Reader feedback
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Customer support
Lock Free Chapter
1
1. Setting Up Your Environment
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1. Setting Up Your Environment
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Getting started with Android development
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Time for action – preparing Windows for Android development
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Time for action – installing Android SDK and NDK on Windows
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Time for action – preparing OS X for Android development
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Time for action – installing Android SDK and NDK on OS X
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Time for action – preparing Ubuntu for Android development
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Time for action – installing Android SDK and NDK on Ubuntu
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Time for action – installing Eclipse with ADT on your OS
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Time for action – creating an Android virtual device
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Time for action – setting up an Android device
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Summary
2
2. Starting a Native Android Project
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2. Starting a Native Android Project
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Building NDK sample applications
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Time for action – compiling and deploying San Angeles sample
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Creating your first native Android project
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Time for action – creating a native Android project
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Interfacing Java with C/C++
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Time for action – calling C code from Java
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Debugging native Android applications
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Time for action – debugging a native Android application
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Analyzing native crash dumps
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Time for action – analyzing a native crash dump
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Setting up a Gradle project to compile native code
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Time for action – creating a native Android project
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Time for action – using your own Makefiles with Gradle
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Summary
3
3. Interfacing Java and C/C++ with JNI
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3. Interfacing Java and C/C++ with JNI
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Initializing a native JNI library
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Time for action – defining a simple GUI
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Time for action – initializing the native store
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Converting Java strings in native code
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Time for action – handling strings in the native store
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Passing Java primitives to native code
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Time for action – handling primitives in the native store
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Referencing Java objects from native code
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Time for action – saving references to Objects in native Store
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Managing Java arrays
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Time for action – handling Java arrays in native Store
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Raising and checking Java exceptions
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Time for action – raising & catching exceptions in native Store
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Summary
4
4. Calling Java Back from Native Code
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4. Calling Java Back from Native Code
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Calling Java back from native code
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Time for action – determining JNI method signatures
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Time for action – calling back Java from native code
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Time for action – allocating an object with JNI
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Time for action – running and synchronizing a thread
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Processing bitmaps natively
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Time for action – decoding a camera's feed
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Time for action – processing pictures with the Bitmap API
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Summary
5
5. Writing a Fully Native Application
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5. Writing a Fully Native Application
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Creating a native Activity
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Time for action – creating a basic native Activity
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Handling Activity events
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Time for action – stepping the event loop
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Time for action – handling Activity events
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Accessing window surface natively
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Time for action – displaying raw graphics
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Measuring time natively
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Time for action – animating graphics with a timer
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Summary
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6. Rendering Graphics with OpenGL ES
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6. Rendering Graphics with OpenGL ES
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Initializing OpenGL ES
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Time for action – initializing OpenGL ES
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Time for action – clearing and swapping buffers
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An insight into the OpenGL pipeline
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Loading textures using the Asset manager
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Time for action – reading assets with the Asset manager
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Time for action – compiling and embedding libpng module
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Time for action – loading a PNG image
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Time for action – generating an OpenGL texture
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Drawing 2D sprites
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Time for action – initializing OpenGL ES
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Rendering particle effects
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Time for action – rendering a star field
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Adapting graphics to various resolutions
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Time for action – adapting resolution with off-screen rendering
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Summary
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7. Playing Sound with OpenSL ES
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7. Playing Sound with OpenSL ES
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Initializing OpenSL ES
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Time for action – creating OpenSL ES engine and output
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Playing music files
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Time for action – playing background music
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Playing sounds
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Time for action – creating and playing a sound buffer queue
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Recording sounds
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Summary
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8. Handling Input Devices and Sensors
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8. Handling Input Devices and Sensors
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Interacting with touch events
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Time for action – handling touch events
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Detecting keyboard, D-Pad, and Trackball events
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Time for action – handling keyboard, D-Pad, and trackball events natively
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Probing device sensors
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Time for action – handling accelerometer events
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Time for action – turning an Android device into a Joypad
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Summary
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9. Porting Existing Libraries to Android
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9. Porting Existing Libraries to Android
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Activating the Standard Template Library
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Time for action – activating GNU STL in DroidBlaster
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Time for action – read files with STL stream
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Time for action – using STL containers
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Porting Box2D to Android
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Time for action – compiling Box2D on Android
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Time for action – running Box2D physics engine
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Prebuilding Boost on Android
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Time for action – prebuilding Boost static library
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Time for action – compiling an executable linked to Boost
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Mastering module Makefiles
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Summary
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10. Intensive Computing with RenderScript
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10. Intensive Computing with RenderScript
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What is RenderScript ?
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Executing a predefined Intrinsic
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Time for action – creating a Java UI
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Time for action – running RenderScript Blur intrinsic
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Writing a custom Kernel
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Time for action – writing a luminance threshold filter
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Combining scripts together
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Time for action – combining Intrinsics and scripts together
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Summary
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11. Afterword
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11. Afterword
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Where we have been
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Where you can go
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Where to find help
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This is just the beginning
12
Index
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Index

Chapter 9. Porting Existing Libraries to Android

There are two main reasons why one would be interested in the Android NDK: first, for performance, and, second, for portability. In the previous chapters, we saw how to access the main native Android APIs from native code for efficiency purposes. In this chapter, we will bring the whole C/C++ ecosystem to Android, well, at least discovering the path, as decades of C/C++ development would be difficult to fit the limited memory of mobile devices anyway! Indeed, C and C++ are still some of the most widely used programming languages nowadays.

In previous NDK releases, portability was limited due to the partial support of C++, especially Exceptions and Run-Time Type Information (RTTI, a basic C++ reflection mechanism to get data types at runtime such as instanceof in Java). Any library requiring them could not be ported without modifying their code or installing a custom NDK (the Crystax NDK, rebuilt by the community from official...

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