![]() The set of posts we’ll introduce at this blog will basically cover the main functionalities of Android NDK (Native Development Kit) as well as the steps to configure the build and development environments. Commonly, this is used in Android when having the requirement for a hardware specific solution and/or application. However, one of the Android’s most curious features is the capacity to extend the standard framework through the implementation of a new set of native functions. It has a set o powerfull functionalities to ease the access to several features: from the network interfaces to the graphical libraries. You will have a below given output,and with this output we are done with our first NDK exmple.Today, the Android is one of the most famous frameworks to build mobile applications. ![]() so file is created.This file is source file which System.loadLibrary(“”) will use.īuild the project and run it on emulator. You will get two folders generated named libs and obj you can explore that folder and you will find that. If everything works fine you will get a following output. On terminal change your current directory to your project name folder. If you are maintaining separate workspace than copy your project to Android NDK repository. Now if you have put your project in Android NDK’s repository than on terminal go to the project directory and type. System internally parses this file for various number of times for its own purpose. jni/Android.mkĪndroid.mk file is written to describe your source to the build system. env is a JNIEnv kind of pointer and second argument is just a simple text which we want to return.Ĭreate it in your jni folder.We need to return a string from the function so written type will be jstring. Return (*env)->NewStringUTF(env, “Hello World!”) JNIEXPORT jstring JNICALL Java_com_testndk_HelloWorld_messageFromNativeCode Now we need to write a body for the function which is declared in header file, which will be something like this. java file as a native method is converted in a C language compatible form. having a close look at the content of header file, you can see that the method name which we have defined in our. This will create a header file in jni folder of your project.There will be some auto generated code in your header file. Go to your bin directory using cd command Public native String messageFromNativeCode() ![]() TxtHello=(TextView)findViewById(R.id.txtHello) ** Called when the activity is first created. java file and write following lines of code. JNI (Java Native Interface) is the utility which allows us to write native code.ĥ) Open your. Installation Guideģ) Create a project in Eclipse named HelloWorld.Ĥ) Create a folder jni in your project directory. Well I will explain you how to create a simple application (I use the word simple so it must be Hello World □ ).Follow the below given steps to deploy your first native code in Android.ġ) Needed tools : Android SDK, Android NDK, Eclipse, Linux shell (If using windows).Ģ) Get that things installed on your work station. (Most of the cases C/C++).Android NDK (Native Development Kit) simplifies the task. But how about some native code development.Yes google Android SDK also provides facility to let their developer develop code in native language. Google is serving the best as per its habit □ ).
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