easyar 识别成功后,怎么回调java层代码

最新推荐文章于 2023-09-23 16:05:34 发布

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最新推荐文章于 2023-09-23 16:05:34 发布

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分类专栏： ar技术文章标签： java ar技术增强现实 easyar

本文链接：https://blog.youkuaiyun.com/zdb1314/article/details/72528949

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本文介绍如何在 EasyAR SDK 中实现 AR 目标识别成功后的 Java 层回调，包括修改 Renderer.java 和 MainActivity.java 文件，以及在 C 层代码中调用 Java 方法的具体步骤。

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easyar是国内开发的一款ar技术sdk,最近开发时遇到问题--- easyar 识别成功后,怎么回调java层代码(其实回调方法sdk应该给出,现在没有只能自己写了)?

很简单,改几个地方就行了

在Renderer.java

public void onDrawFrame(GL10 gl) {
MainActivity.nativeRender(this);
}

//此方法用来c层回调，输出c代码层的信息
public void output(String out) {
Log.i("zdbb", "zdbb.. c代码回调: " + out);
}

MainAtivity.java
public static native void nativeRender(Object obj);

helloar.cc  (红色字体为关键)

extern "C" {
  JNIEXPORT jboolean JNICALL JNIFUNCTION_NATIVE(nativeInit(JNIEnv* env, jobject object));
  JNIEXPORT void JNICALL JNIFUNCTION_NATIVE(nativeDestory(JNIEnv* env, jobject object));
  JNIEXPORT void JNICALL JNIFUNCTION_NATIVE(nativeInitGL(JNIEnv* env, jobject object));
  JNIEXPORT void JNICALL JNIFUNCTION_NATIVE(nativeResizeGL(JNIEnv* env, jobject object, jint w, jint h));
  JNIEXPORT void JNICALL JNIFUNCTION_NATIVE(nativeRender(JNIEnv* env, jobject obj, jobject log));
JNIEXPORT void JNICALL JNIFUNCTION_NATIVE(nativeRotationChange(JNIEnv* env, jobject obj, jboolean portrait));
};

JNIEXPORT void JNICALL JNIFUNCTION_NATIVE(nativeRender(JNIEnv* env, jobject obj, jobject log))
{
ar.render( env,  log);
}

void HelloARVideo::render(JNIEnv* env, jobject obj)
{
glClearColor(0.f, 0.f, 0.f, 1.f);
  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

  Frame frame = augmenter_.newFrame();
  if(view_size[0] > 0){
      AR::resizeGL(view_size[0, view_size[1);
      if(camera_ && camera_.isOpened())
         view_size[0] = -1;
  }
  augmenter_.setViewPort(viewport_);
  augmenter_.drawVideoBackground();
  glViewport(viewport_[0, viewport_[1, viewport_[2, viewport_[3);

  AugmentedTarget::Status status = frame.targets()[0.status();
  if(status == AugmentedTarget::kTargetStatusTracked){
      int id = frame.targets()[0.target().id();

      std::string idStr = frame.targets()[0.target().uid();
      if(active_target && active_target != id) {
         video->onLost();
         delete video;
         video = NULL;
         tracked_target = 0;
         active_target = 0;
      }
      if (!tracked_target) {
/*
*       回调java代码
*/          jclass cls = env->GetObjectClass(obj);
         jmethodID jmid = env->GetMethodID(cls, "output", "(Ljava/lang/String;)V");
         jstring info = env->NewStringUTF("你的选择没有错,我欠你的太多 ! ! ! ");
         env->CallVoidMethod(obj, jmid,info);
         jboolean  *jboolean1 = new jboolean(false);
         env->ReleaseStringUTFChars(info,env->GetStringUTFChars( info,jboolean1));

         if (video == NULL) {
              if(frame.targets()[0.target().name() == std::string("argame") && texid[0]) {
                  video = new ARVideo;
                  video->openVideoFile("video.mp4", texid[0]);
                  video_renderer = renderer[0;
              }
              else if(frame.targets()[0.target().name() == std::string("namecard") && texid[1]) {
                  video = new ARVideo;
                  video->openTransparentVideoFile("transparentvideo.mp4", texid[1]);
                  video_renderer = renderer[1;
              }
              else if(frame.targets()[0.target().name() == std::string("idback") && texid[2]) {
                  video = new ARVideo;
                  video->openStreamingVideo("http://m21.oss-cn-qingdao.aliyuncs.com/1494836612692.mp4",texid[2]);
                  video_renderer = renderer[2;
              }

         }
         if (video) {
              video->onFound();
              tracked_target = id;
              active_target = id;
         }

      }
      Matrix44F projectionMatrix = getProjectionGL(camera_.cameraCalibration(), 0.2f, 500.f);
      Matrix44F cameraview = getPoseGL(frame.targets()[0.pose());
      ImageTarget target = frame.targets()[0.target().cast_dynamic<ImageTarget>();
      if(tracked_target) {
         video->update();
         video_renderer->render(projectionMatrix, cameraview, target.size());
      }
} else {
      if (tracked_target) {
         video->onLost();
         tracked_target = 0;
      }
}
}