![]() The entire application can be written in C using this method. The other way to use the NDK is to create a main Activity class implemented in C. If you’re familiar with JNI (Java Native Interface), then you’ll be accustomed to this type of scenario. The first is a regular Java Android app that uses C code for only certain pieces of application functionality. These demonstrate the two basic types of NDK usage. The NDK download comes with several sample apps. For example, we placed the NDK directory at d:devtoolsndk. At the time of this writing, the latest version was Android NDK, Revision 7 (Released November 2011).Īfter downloading the NDK, uncompress the file and extract the NDK source tree whenever you’re storing your other developer tools. Instead, the Android NDK package needs to be downloaded and installed on your development machine separately.īegin by downloading the latest version of the NDK for your operating system from the Android site. Unlike many other Android tools, the Android NDK can’t be installed via the Android SDK Manager. ![]() On Windows, most functionality is available in NDK r7 (unlike previous versions) with one exception: ndk-gdb still requires the use of Cygwin. Always test on device hardware to make sure your application behaves as expected.Īs for the Android NDK prerequisites for your development machine, you can develop using the NDK on Windows, Mac, and Linux operating systems that support the Android SDK. That said, Google TV devices do not support the NDK, despite many of them running API Level 12 now. These days, that’s not a particularly big issue (only 0.6% of devices are still only on Level 3, and Google no longer tracks levels below that). For one, the devices must support at least API Level 3. However, this does not imply that all devices are supported. This provides coverage of all ARM-based Android devices as well as Intel-based devices, such as devices running on Intel Atom processors. The NDK is not part of the stock Android SDK experience.įor device targeting, the Android NDK generates machine code for ARMv5TE, ARMv7-A, and x86. When you’ve decided the Android NDK is worth using for your project, you’ll need to take your target device(s) and development machine OS into consideration before installing and using it. This perk is often leveraged with applications that target multiple operating systems using OpenGL ES. Here, using the NDK could simply your application development, allow for shared code with other platforms, and generally help you avoid maintaining parallel codebases in multiple programming languages. ![]() There is some overhead from making the jump back and forth between the Android Java application and native code, not to mention the fact that using the Android NDK increases the code complexity of your project pretty substantially.Īs for porting, you can use the NDK is to leverage existing code you’ve already got in C or C++. That is, the application algorithms are tapping into all of the device’s processing power within the DalvikVM this code may see performance benefits from running natively.īut it’s not like just any application would see performance benefits from using the NDK. For performance, the NDK can provide high-performance operations for your application if it’s truly processor bound. There are two main reasons to consider using the Android NDK: performance and porting. In this tutorial, we explain why the NDK is important, when you should use it, and when you’re better off without it. It provides you with everything you need to link your own C/C++ libraries to your apps, as well as commonly-used system libraries like libc, libm, OpenGL ES, libz, JNI, and logging libraries for use. ![]() The Android NDK (Native Development Kit), now on its seventh major revision, is a bundle of tools, libraries and documentation that can be used to link in native C/C++ libraries into your Android Java projects. We may make money when you click on links to our partners. content and product recommendations are editorially independent.
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