Do with Love For My Lord!!: Import Vuforia Android Sample in OS X

Phew, it has been so long until I decided to write new tutorial. I have done some just-for-me app, but I just can't stop and write some tutorial about it. And today I grant my wish to write one simple tutorial.

So, AR(Augmented Reality) became very popular these days. And I wish to make one, hopefully with my very own mascot 3D model in near future. But as for now, I will just start the very basic steps.

The first step is to sign up in Vuforia website, and log in. Then go to developer page that give you tutorial how to make Android AR apps used Vuforia. Here I will give some general steps.

1. Download Eclipse, Android SDK, ADT and NDK. Install it based on Android page or here.

2. Download vuforia SDK from this page. Unzip it, double click it, and instal it.

3. As a result, you will get this folders :

4. Then set the QCAR environment variable on eclipse. Eclipse->Preferences. Navigate to Java->Build Path->Classpath Variables using the hierarchy browser. Create a new variable by selecting New...

5. Now, download the Vuforia samples project from this page.

6. You may extract it and put it in folder samples inside vuforia-sdk-android-2-0-31 like me.

7. For this tutorial, I will use ImageTarget project as an example.

8. Open terminal, then go to ImageTarget project location, and do ndk-build to create native library.

bash-3.2# cd /Volumes/Data/Android/newVuforia/vuforia-sdk-android-2-0-31/samplesbash-3.2# cd ImageTargets-2-0-7/
bash-3.2# ls.DS_Store assets project.properties.classpath jni res.project license.txt srcAndroidManifest.xml media
bash-3.2# ndk-build
Compile++ arm : ImageTargets <= ImageTargets.cpp
Compile++ arm : ImageTargets <= SampleUtils.cpp
Compile++ arm : ImageTargets <= Texture.cpp
StaticLibrary : libstdc++.a
Prebuilt : libQCAR.so <= jni/../../../build/lib/armeabi/
SharedLibrary : libImageTargets.so
Install : libImageTargets.so => libs/armeabi/libImageTargets.so
Install : libQCAR.so => libs/armeabi/libQCAR.so
Compile++ arm : ImageTargets <= ImageTargets.cpp
Compile++ arm : ImageTargets <= SampleUtils.cpp
Compile++ arm : ImageTargets <= Texture.cpp
StaticLibrary : libstdc++.a
Prebuilt : libQCAR.so <= jni/../../../build/lib/armeabi-v7a/
SharedLibrary : libImageTargets.so
Install : libImageTargets.so => libs/armeabi-v7a/libImageTargets.so
Install : libQCAR.so => libs/armeabi-v7a/libQCAR.so
bash-3.2#

9. Then, import ImageTarget project in Eclipse.

10. Check the .jar of dependencies like QCAR.so, you may check the package tree like this :

11. You may see no errors and run it. But maybe you unfortunate like me to get such errors, when you click the "start" button:

05-14 22:54:22.011: E/AndroidRuntime(17870): FATAL EXCEPTION: main

05-14 22:54:22.011: E/AndroidRuntime(17870): java.lang.ExceptionInInitializerError

05-14 22:54:22.011: E/AndroidRuntime(17870): at java.lang.Class.newInstanceImpl(Native Method)

05-14 22:54:22.011: E/AndroidRuntime(17870): at java.lang.Class.newInstance(Class.java:1409)

05-14 22:54:22.011: E/AndroidRuntime(17870): at android.app.Instrumentation.newActivity(Instrumentation.java:1040)

05-14 22:54:22.011: E/AndroidRuntime(17870): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1777)

05-14 22:54:22.011: E/AndroidRuntime(17870): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1893)

05-14 22:54:22.011: E/AndroidRuntime(17870): at android.app.ActivityThread.access$1500(ActivityThread.java:135)

05-14 22:54:22.011: E/AndroidRuntime(17870): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1054)

05-14 22:54:22.011: E/AndroidRuntime(17870): at android.os.Handler.dispatchMessage(Handler.java:99)

05-14 22:54:22.011: E/AndroidRuntime(17870): at android.os.Looper.loop(Looper.java:150)

05-14 22:54:22.011: E/AndroidRuntime(17870): at android.app.ActivityThread.main(ActivityThread.java:4385)

05-14 22:54:22.011: E/AndroidRuntime(17870): at java.lang.reflect.Method.invokeNative(Native Method)

05-14 22:54:22.011: E/AndroidRuntime(17870): at java.lang.reflect.Method.invoke(Method.java:507)

05-14 22:54:22.011: E/AndroidRuntime(17870): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)

05-14 22:54:22.011: E/AndroidRuntime(17870): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)

05-14 22:54:22.011: E/AndroidRuntime(17870): at dalvik.system.NativeStart.main(Native Method)

05-14 22:54:22.011: E/AndroidRuntime(17870): Caused by: java.lang.NoClassDefFoundError: java.util.UUID

05-14 22:54:22.011: E/AndroidRuntime(17870): at java.lang.Runtime.nativeLoad(Native Method)

05-14 22:54:22.011: E/AndroidRuntime(17870): at java.lang.Runtime.loadLibrary(Runtime.java:432)

05-14 22:54:22.011: E/AndroidRuntime(17870): at java.lang.System.loadLibrary(System.java:554)

05-14 22:54:22.011: E/AndroidRuntime(17870): at com.qualcomm.QCARSamples.ImageTargets.ImageTargets.loadLibrary(ImageTargets.java:858)

05-14 22:54:22.011: E/AndroidRuntime(17870): at com.qualcomm.QCARSamples.ImageTargets.ImageTargets.<clinit>(ImageTargets.java:125)

05-14 22:54:22.011: E/AndroidRuntime(17870): ... 15 more

05-14 22:54:22.011: E/AndroidRuntime(17870): Caused by: java.lang.NoClassDefFoundError: java.util.UUID