By Feipeng Liu
A step by step educational with greater than 60 concise recipes on Android NDK improvement skills.
• construct, debug, and profile Android NDK apps.
• enforce a part of Android apps in local C/C++ code.
• Optimize code functionality in meeting with Android NDK.
Building Android functions could often suggest that you simply spend your entire time operating in Java. There are besides the fact that instances whilst this isn't the most productive or top strategy for the applying being outfitted. this is often the place Android NDK comes in.
Android NDK permits the developer to write down in local C/C++, providing you with the facility to reuse code and libraries and in addition, ordinarily, bring up the rate and potency of your application.
The Android local improvement equipment Cookbook can assist you realize the improvement, development, and debugging of your local Android purposes. we'll notice and research JNI programming and crucial NDK APIs comparable to OpenGL ES, and the local program API. we'll then discover the method of porting current libraries and software program to NDK. by way of the tip of this publication it is possible for you to to construct your individual apps in NDK apps.
Android local improvement equipment Cookbook starts off with easy recipes to help you within the development and debugging of local apps, and JNI programming. The recipes hide a variety of themes of program improvement with Android NDK corresponding to OpenGL programming and Multimedia programming. we'll start with an easy recipe, hi NDK, sooner than relocating directly to hide complex subject matters with recipes on OpenGL ES that concentrate on 2nd and 3D pics, in addition to recipes that debate operating with NDK and exterior APIs. when you are searching for how one can make your software to be had in Android and take measures to spice up your application’s functionality, then this Cookbook is for you.
What you'll examine from this book
• strengthen Android apps in C/C++ and not using a unmarried line of Java.
• application 2D/3D photographs with either OpenGL ES 1x and 2.0 in Android NDK.
• Write multi-threaded Android apps in Android NDK.
• Port present C/C++ libraries and functions to Android with NDK.
• strengthen multimedia Android apps with Android NDK.
This publication is written in a Cookbook variety, starting with recipes which specialize in aiding builders make their software/application to be had in Android.
Who this booklet is written for
Android builders who are looking to research Android NDK programming, or boost multimedia and video games in Android NDK will make the most of this ebook.
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Additional info for Android Native Development Kit Cookbook
One example of this is to use IsSameObject and never use "==" to test if two references point to the same underlying object unless we test against NULL. The number of Delete
A native thread must call the JNI function AttachCurrentThread to attach itself to the VM, to obtain the JNIEnv interface pointer. We will see an example of this in the Manipulating classes in JNI recipe in this chapter. ff Registering Native Methods: JNI can automatically discover the native method implementation if its function name follows a specific naming convention as mentioned in Chapter 1, Hello NDK. This is not the only way. In our sample project, we explicitly called the RegisterNatives JNI function to register the native methods.
UCS2 and UCS4 belong to this category. The numbers 2 and 4 refer to the number of bytes in one code value. Unicode defines more characters than what two bytes can possibly represent. Therefore, UCS2 can only represent a subset of Unicode characters. Because Unicode defines fewer characters than what four bytes can represent, multiple code values of UTF-32 are never needed. Therefore, UTF-32 and UCS4 are functionally identical. Java programming language uses UTF-16 to represent strings. If a character cannot fit in a 16-bit code value, a pair of code values named surrogate pair is used.