How to run Ndk sample app in android

Question

Hi. I want to work on an Augmented Reality application. So I followed this link https://developer.vuforia.com/resources/dev-guide/step-2-installing-vuforia-sdk and I installed sdk, ndk, cygwin, vuforia-sdk-android-2-0-31 and I set path for all of them but when I run ImageTargets sample app, I'm getting unsatisfied link exception. Can anyone suggest me where I did wrong and how to solve that issue.

in my case

sdk path: C:\Development\Android\android-sdk-windows
eclips path: C:\Development\Android\android-sdk-windows\eclipse
cygwin path: C:\cygwin
ndk path: C:\Development\Android\vuforia-sdk-android-2-0-31
vuforia-sdk-android path: C:\Development\Android\vuforia-sdk-android-2-0-31

In environment variables I set path to sdk, ndk and cygwin like below:

C:\Development\Android\android-sdk-windows\tools\;
C:\cygwin\bin;
C:\Development\Android\android-ndk-r8\

Answer 1

You should build the native code (C++) by running ndk-build command from cygwin command-line. Open up the Cygwin.bat in your installation directory to access the command-line and change the directory to the root folder of ImageTarget project and run this:

ndk-build

If it successfully builds the native codes, you should see a lib folder added to your project in Eclipse. Now, you may build your APK and run it on your device. You should repeat this step every time you make a change to native codes.