Android NDK Beginners Guide - Second Edition

Discover the local aspect of Android and inject the facility of C/C++ on your applications

About This Book

  • Create excessive functionality cellular functions with C/C++ and combine with Java
  • Exploit complicated Android good points akin to portraits, sound, enter, and sensing
  • Port and reuse your individual or third-party libraries from the prolific C/C++ ecosystem

Who This booklet Is For

Are you an Android Java programmer who wishes extra functionality? Are you a C/C++ developer who does not are looking to hassle with the complexity of Java and its out-of-control rubbish collector? do you need to create quick extensive multimedia purposes or video games? If you could have replied certain to any of those questions then this publication is for you. With a few common wisdom of C/C++ improvement, it is possible for you to to dive headfirst into local Android development.

What you'll Learn

  • Build your first Android local undertaking from scratch
  • Communicate with Java via Java local Interfaces
  • Learn the foremost layout intricacies of making a local OpenGL ES 2.0 portraits application
  • Initialize, play, and list sound and song with OpenSL ES
  • Handle enter occasions and sensors to create assorted interplay types
  • Port an present library on Android by means of compiling most typical C++ frameworks on Android
  • Interface and optimize the present code with RenderScript
  • Combine images, sound, enter, sensors, and physics on your application

In Detail

Android NDK is all approximately injecting high-performance and conveyable code into your cellular apps through exploiting the utmost pace of the gadget they run on.

This publication will provide help to create C/C++-enabled cellular functions and combine them with Java. The books begins with educating you ways to entry local API and port libraries utilized in probably the most profitable Android purposes. subsequent, you'll circulation directly to create a true local software undertaking in the course of the whole implementation of a local API and porting current third-party libraries. relocating ahead, you'll find out how to entry the keyboard and enter peripherals and skim accelerometer or orientation sensors. ultimately, you'll dive into extra complicated issues comparable to RenderScript.

Show description

Quick preview of Android NDK Beginners Guide - Second Edition PDF

Best Java books

Mastering Lambdas: Java Programming in a Multicore World (Oracle Press)

The Definitive advisor to Lambda Expressions getting to know Lambdas: Java Programming in a Multicore global describes how the lambda-related positive factors of Java SE eight will let Java to satisfy the demanding situations of next-generation parallel architectures. The publication explains the way to write lambdas, and the way to exploit them in streams and in assortment processing, offering code examples all through.

Mastering JavaFX 8 Controls (Oracle Press)

Layout and installation High-Performance JavaFX Controls bring state of the art purposes with visually attractive UIs. learning JavaFX eight Controls presents transparent directions, unique examples, and ready-to-use code samples. the way to paintings with the most recent JavaFX APIs, configure UI parts, instantly generate FXML, construct state-of-the-art controls, and successfully practice CSS styling.

Data Abstraction and Problem Solving with Java: Walls and Mirrors (3rd Edition)

The 3rd version of info Abstraction and challenge fixing with Java: partitions and Mirrors employs the analogies of partitions (data abstraction) and Mirrors (recursion) to educate Java programming layout suggestions, in a fashion that starting scholars locate available. The publication has a student-friendly pedagogical process that conscientiously debts for the strengths and weaknesses of the Java language.

Java Software Solutions: Foundations of Program Design (7th Edition)

Java software program strategies teaches a origin of programming thoughts to foster well-designed object-oriented software program. Heralded for its integration of small and massive sensible examples, this around the globe best-selling textual content emphasizes construction stable problem-solving and layout abilities to write down fine quality courses.

Additional info for Android NDK Beginners Guide - Second Edition

Show sample text content

0f)) { mVertical = zero. 0f; } else { mVertical = lVertical; } } else { mHorizontal = zero. 0f; mVertical = zero. 0f; } go back precise; } } Let's end by way of creating a mild amendment to the sport itself. eventually, edit DroidBlaster. cpp and replace InputService at every one iteration:#include "DroidBlaster. hpp" #include "Log. hpp" namespace dbs { ... packt::status DroidBlaster::onStep() { mTimeService->update(); mBackground. update(); mShip. update(); if (mInputService->update() ! = packt::STATUS_OK) { go back packt::STATUS_KO; } if (mGraphicsService->update() ! = packt::STATUS_OK) { go back packt::STATUS_KO; } go back packt::STATUS_OK; } ... } What simply occurred? we now have prolonged our enter procedure to deal with the keyboard, D-Pad, and trackball occasions. D-Pad may be regarded as a keyboard extension and is processed a similar method. certainly, D-Pad and keyboard occasions are transported within the similar constitution (AInputEvent) and dealt with by means of an analogous API (prefixed with AKeyEvent). the next desk lists the most key occasion tools: AKeyEvent_getAction() point out if button is down (AKEY_EVENT_ACTION_DOWN) or published (AKEY_EVENT_ACTION_UP). observe that a number of key activities may be emitted in batch (AKEY_EVENT_ACTION_MULTIPLE). AKeyEvent_getKeyCode() To retrieve the particular button being pressed (defined in android/keycodes. h), for instance, AKEYCODE_DPAD_LEFT for the left button. AKeyEvent_getFlags() Key occasions should be linked to a number of flags that supply a variety of details at the occasion like AKEY_EVENT_LONG_PRESS, AKEY_EVENT_FLAG_SOFT_KEYBOARD for occasion originated from an emulated keyboard. AKeyEvent_getScanCode() is the same to a key code other than that this is often the uncooked key identity, based and varied from machine to equipment. AKeyEvent_getMetaState() Meta states are flags that point out if a few modifier keys like Alt or Shift are pressed at the same time (for instance, AMETA_SHIFT_ON, AMETA_NONE, and so on). AKeyEvent_getRepeatCount() shows what number instances the button occasion happened, often should you depart button down. AKeyEvent_getDownTime() to understand whilst a button used to be pressed. even though a few of them (especially optical ones) behave like a D-Pad, trackballs usually are not utilizing an analogous API. truly, trackballs are dealt with throughout the AMotionEvent API (like contact events). after all, a few info supplied for contact occasions isn't really consistently to be had on trackballs. crucial services to examine are: AMotionEvent_getAction() to grasp if an occasion represents a stream motion (as against a press action). AMotionEvent_getX() AMotionEvent_getY() To get trackball circulate. AKeyEvent_getDownTime() to grasp if trackball is pressed (like D-Pad motion button). presently, so much trackballs use an all-or-nothing strain to point the click occasion. anything difficult with trackballs, that will not be noticeable at the start, is that no occasion up is generated to point that trackball has complete relocating. furthermore, trackball occasions are generated as a chain (as a burst) which makes it tougher to become aware of while move is completed.

Download PDF sample

Rated 4.51 of 5 – based on 45 votes