the page is not availabl.. could you pls some other link

thank you

Hi Kasunw,

Pl. let me know what was useful. The link is missing in your mail. I would like to load a custom view after the object is detected.

How to achieve that pl. let me know.

This was very helpfull .. thanks....

Excelllent.

Thanks AlessandroB. it was your help,now i am able to open new activity after detection of image target. :)

Hi,

that's because the article still refers to the 1.5 API;  so, you need to replace getNumActiveTrackables() with getNumTrackableResults() and also replace getActiveTrackable( tIdx) with getTrackableResult( tIdx ); essentially your "for loop" must be updated as shown here:

 for(int tIdx = 0; tIdx < state.getNumTrackableResults(); tIdx++)
    {
        // Get the trackable:
        const QCAR::TrackableResult* result = state.getTrackableResult(tIdx);
        const QCAR::Trackable& trackable = result->getTrackable();

Also, trackable->getName() must be replaced by trackable.getName(), and trackable->getId() must be replaced by trackable.getId()

i followed the link but i am getting the follwong error.

--------------------------------------------------------------------------------

C:\Developement\adt-bundle-windows\vuforia-sdk-android-2-0-29\samples\ImageTarge
ts-2-0-7>C:\Developement\adt-bundle-windows\android-ndk-r8c\ndk-build
"Compile++ arm  : ImageTargets <= ImageTargets.cpp
jni/ImageTargets.cpp: In function 'void Java_com_qualcomm_QCARSamples_ImageTarge
ts_ImageTargetsRenderer_renderFrame(JNIEnv*, jobject)':
jni/ImageTargets.cpp:345:34: error: 'class QCAR::State' has no member named 'get
NumActiveTrackables'
jni/ImageTargets.cpp:348:50: error: 'class QCAR::State' has no member named 'get
ActiveTrackable'
make: *** [obj/local/armeabi/objs/ImageTargets/ImageTargets.o] Error 1

----------------------------------------------------------------------------------------------------------

my renderframe method of cpp file is like this..

int lastTrackableId = -1;
JNIEXPORT void JNICALL
Java_com_qualcomm_QCARSamples_ImageTargets_ImageTargetsRenderer_renderFrame(JNIEnv* env, jobject obj)
{
    //LOG("Java_com_qualcomm_QCARSamples_ImageTargets_GLRenderer_renderFrame");

    // Clear color and depth buffer
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // Get the state from QCAR and mark the beginning of a rendering section
    QCAR::State state = QCAR::Renderer::getInstance().begin();

    // Explicitly render the Video Background
    QCAR::Renderer::getInstance().drawVideoBackground();

#ifdef USE_OPENGL_ES_1_1
    // Set GL11 flags:
    glEnableClientState(GL_VERTEX_ARRAY);
    glEnableClientState(GL_NORMAL_ARRAY);
    glEnableClientState(GL_TEXTURE_COORD_ARRAY);

    glEnable(GL_TEXTURE_2D);
    glDisable(GL_LIGHTING);

#endif

    glEnable(GL_DEPTH_TEST);

    // We must detect if background reflection is active and adjust the culling direction.
    // If the reflection is active, this means the post matrix has been reflected as well,
    // therefore standard counter clockwise face culling will result in "inside out" models.
    glEnable(GL_CULL_FACE);
    glCullFace(GL_BACK);
    if(QCAR::Renderer::getInstance().getVideoBackgroundConfig().mReflection == QCAR::VIDEO_BACKGROUND_REFLECTION_ON)
        glFrontFace(GL_CW);  //Front camera
    else
        glFrontFace(GL_CCW);   //Back camera

    for(int tIdx = 0; tIdx<state.getNumActiveTrackables(); tIdx++)
    {
        // Get the trackable:
        const QCAR::Trackable* trackable = state.getActiveTrackable(tIdx);
        // Compare this trackable's id to a globally stored id
        // If this is a new trackable, find the displayMessage java method and
        // call it with the trackable's name
        if (trackable->getId() != lastTrackableId) {
            jstring js = env->NewStringUTF(trackable->getName());
            jclass javaClass = env->GetObjectClass(obj);
            jmethodID method = env->GetMethodID(javaClass, "displayMessage", "(Ljava/lang/String;)V");
            env->CallVoidMethod(obj, method, js);
            lastTrackableId = trackable->getId();
        }
    }

    glDisable(GL_DEPTH_TEST);

#ifdef USE_OPENGL_ES_1_1
    glDisable(GL_TEXTURE_2D);
    glDisableClientState(GL_VERTEX_ARRAY);
    glDisableClientState(GL_NORMAL_ARRAY);
    glDisableClientState(GL_TEXTURE_COORD_ARRAY);
#else
    glDisableVertexAttribArray(vertexHandle);
    glDisableVertexAttribArray(normalHandle);
    glDisableVertexAttribArray(textureCoordHandle);
#endif

    QCAR::Renderer::getInstance().end();
}

what things i need to do more to make this working.?

Okay thanks. I will follow this tutorial

Hi, you can follow this tutorial:

https://developer.vuforia.com/resources/dev-guide/open-web-site-and-display-toast-target-detection