play native video on the ImageTarget like "stone"

Hi,I want to use the Android widget "VideoView" to play a Video on the Target, I found someone like me ask the question [HTML]https://ar.qualcomm.at/arforums/showthread.php?t=1096[/HTML] but i found he use the Intent to another activity to play the vedio. And i want to play it on the current activity ImageTargets.java. Here is my code snippet : First: ImageTargets.cpp [CODE] // 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, "VideoPlay", "(Ljava/lang/String;)V"); env->CallVoidMethod(obj, method, js); lastTrackableId = trackable->getId(); } [/CODE] Second: ImageTargetsRenderer.java I make a little change: public class ImageTargetsRenderer [COLOR=Red]extends Activity[/COLOR] implements GLSurfaceView.Renderer { ...... Here is my VideoPlayCode public void VideoPlay() { VideoView videoView = (VideoView)findViewById(R.id.videoView); videoView.setVideoPath("/sdcard/Channel2.mp4"); MediaController mc = new MediaController(this); videoView.setMediaController(mc); videoView.requestFocus(); videoView.start(); } } Third How should I call the VideoPlay() function ? protected void onResume() { super.onResume(); .............. } Please help me ... Regards