Download E-books Pro Android C++ with the NDK PDF
By Onur Cinar
Android is likely one of the significant gamers within the cellphone marketplace. Android is a cellular platform that's outfitted at the best of Linux working procedure. The native-code help on Android deals unending possibilities to program builders, now not constrained the performance that's supplied by means of Android framework. Pro Android C++ with the NDK is a sophisticated instructional reference for modern extra subtle app builders now porting, constructing or using C++ and different local code to integrate into the Android platform to run subtle local apps and higher acting apps mostly. utilizing a video game app case examine, this booklet explores instruments for troubleshooting, debugging, examining reminiscence concerns, unit checking out, unit try code assurance, functionality size, on local purposes, in addition to integrating the Android NDK toolchain into present Autoconf, Makefile, CMake, or JAM established construct structures. Pro Android C++ with the NDK also covers the next:
- The Android platform, and getting on top of things with the Android NDK, and exploring the APIs which are supplied in local house.
- An evaluate of Java local Interface (JNI), and auto-generating JNI code via Simplified Wrapper and Interface Generator (SWIG).
- An advent to Bionic API, local networking. local multithreading, and the C++ general Template Library (STL) aid.
- Native pix and sound utilizing JNI pix, OpenGL ES, and OpenSL ES.
- Debugging and troubleshooting local purposes utilizing Logging, GNU Debugger (GDB), Eclipse Debugger, Valgrind, strace, and different instruments.
- Profiling local code utilizing GProf to spot functionality bottlenecks, and NEON/SIMD optimization from a sophisticated point of view, with tips and suggestions.
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Click on the Debug button. 7. Eclipse helps diversified views, workbench layouts, for various projects. Upon clicking the Debug button, Eclipse will ask you if you'd like to modify to the Debug standpoint, as proven in Figure 5-7. click on convinced to continue. determine 5-7. Switching to the debug standpoint eight. utilizing the Android equipment or the emulator, click on the decision local button to invoke the local functionality. once the local code hits the breakpoint, the applying will cease and provides the keep watch over to the debugger, as proven in Figure 5-8. 142 bankruptcy five: Logging, Debugging, and Troubleshooting determine 5-8. Eclipse debug point of view in motion The debug viewpoint promises a whole photo of the local code’s present country. at the best left, the Debug view exhibits the checklist of working threads and the functionality that they're at present working. at the best correct nook, the Variables view promises entry to the local variables and allows you to to examine their present values. within the middle region, the local resource code is proven within the Editor view, and an arrow is proven at the marker bar subsequent to the road that might be finished subsequent. As proven in Figure 5-9, utilizing the debug toolbar, you could keep an eye on the execution of the applying. determine 5-9. Debug toolbar the subsequent activities are supplied during the debug toolbar: Skip All Breakpoints: helps you to disable all breakpoints. Resume: Resumes the execution of the local code till the following breakpoint. bankruptcy five: Logging, Debugging, and Troubleshooting 143 Suspend: Suspends the execution of local code through sending the SIGINT interrupt sign to the method, which lets you examine the present country of the local code. Step Into: Follows the subsequent local name through going into it. Step Over: Executes the subsequent local name after which stops. Step go back: Executes until eventually the local functionality returns. Terminate: Terminates the debug consultation. Debugging of local purposes isn't just attainable via Eclipse. an analogous point of debugging performance is additionally completed during the command line to boot. The Command Line local code should be debugged utilizing the ndk-gdb script from the command line. presently the ndk-gdb script calls for a UNIX shell to run. at the home windows platform, you'll use Cygwin rather than the command urged for debugging. First, open Cygwin or the Terminal window, in response to your platform. you are going to use the hello-jni pattern undertaking for this test. 1. ensure that Eclipse isn't any longer operating as a way to hinder any conflicts. 2. switch the present listing to the hello-jni venture listing. three. Delete any leftover records from the Eclipse through issuing rm –rf bin obj libs. four. collect the local module via issuing ndk-build at the command line. five. with the intention to collect and package deal the applying from command line, ensure that the ANT construct script construct. xml dossier exists in undertaking listing. If this can be the 1st time you're development this undertaking from the command line, factor android replace venture –p to generate the mandatory construct records.