Download Android Native Development Kit Cookbook by Feipeng Liu PDF

By Feipeng Liu

A step by step educational with greater than 60 concise recipes on Android NDK improvement skills.

Overview

• 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.

In Detail

Building Android purposes may frequently suggest that you simply spend all your time operating in Java. There are besides the fact that instances whilst this isn't the best or top approach for the applying being outfitted. this can be the place Android NDK comes in.

Android NDK permits the developer to write down in local C/C++, supplying you with the ability to reuse code and libraries and likewise, mostly, bring up the rate and potency of your application.

The Android local improvement equipment Cookbook might help you know the advance, development, and debugging of your local Android purposes. we are going to notice and study JNI programming and crucial NDK APIs corresponding to OpenGL ES, and the local software API. we are going to then discover the method of porting present libraries and software program to NDK. via the top of this booklet it is possible for you to to construct your personal apps in NDK apps.

Android local improvement equipment Cookbook starts off with uncomplicated recipes that can assist you within the construction and debugging of local apps, and JNI programming. The recipes conceal quite a few issues of program improvement with Android NDK equivalent to OpenGL programming and Multimedia programming. we are going to commence with an easy recipe, hi NDK, ahead of relocating directly to hide complicated themes with recipes on OpenGL ES that target second and 3D photographs, in addition to recipes that debate operating with NDK and exterior APIs. when you are searching for how one can make your program on hand 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

• improve Android apps in C/C++ with no unmarried line of Java.
• software 2D/3D pics with either OpenGL ES 1x and 2.0 in Android NDK.
• Write multi-threaded Android apps in Android NDK.
• Port current C/C++ libraries and functions to Android with NDK.
• boost multimedia Android apps with Android NDK.

Approach

This publication is written in a Cookbook type, starting with recipes which specialise in assisting builders make their software/application to be had in Android.

Who this e-book is written for

Android builders who are looking to study Android NDK programming, or boost multimedia and video games in Android NDK will reap the benefits of this publication.

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Additional info for Android Native Development Kit Cookbook

Example text

The order of steps 2 and 3 is a decision to be determined by the individual modeler and may well depend upon how difficult the modeling exercise is to the modeler. Good modeling practice includes checking that terms to be added have the same units (you are not adding "apples and oranges"). Furthermore, for constraints, verify that the units on the left-hand side of the constraint are the same as the units on the right-hand side (resources); that is, check that you are not comparing apples to oranges.

5 are satisfied. 4 intersect. Notes: (1) The solution to this example occurred at the corner point (extreme point) C (3/2, 1). The choice of a specific extreme point as the optimum depends on the slope of the objective function. 5 but change the objective function, the solution will still be at one of the extreme points A, B, C, D, and E, but not necessarily at point C. 5, as the slope of the objective function (the profits per unit) is gradually changed, a critical value of the slope exists, where the optimal solution will change to a different extreme point.

Example 6. A scientist has a certain quantity, f, as a function of the variable t. 2 + ct + d from the results of her n experiments (data points) having values (t1,f1), (t2, f2, , (tn, fn). The scientist discovers that the values of the unknown coefficients a, b, c, and d must be nonnegative and should add up to one. In Page 23 order to account for errors (residuals), she defines an error term, ei, where ei = fi f(ti), i = 1, . . , n She wants to determine the best values for the coefficients a, b, c, and d by using the following criteria (objective functions): Note: This criterion measures the sum of the absolute deviations.

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