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boolean isInstallArEngineApk = AREnginesApk.isAREngineApkReady(this);
 
if (!isInstallArEngineApk) {
    // ConnectAppMarketActivity.class is the activity for redirecting to AppGallery.
    startActivity(new Intent(this, com.huawei.arengine.demos.common.ConnectAppMarketActivity.class));
    isRemindInstall = true;
}

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//Create an ARSession.
mArSession = new ARSession(this);
//Select a specific Config to initialize the ARSession based on the application scenario.
ARWorldTrackingConfig config = new ARWorldTrackingConfig(mArSession);
mArSession.configure(config);
mArSession.resume();

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//Obtain a frame of data from ARSession.
ARFrame arFrame = mArSession.update();
//Obtain the ARCamera object from the ARFrame object. The ARCamera object can obtain the projection matrix of the camera to render the window.
ARCamera arCamera = arFrame.getCamera();
//Obtain all trackable planes from ARSession.
Collection<ARPlane> arPlanes = mArSession.getAllTrackables(ARPlane.class);

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//Pass the click event to the ARFrame object and generate the hit detection result.
List<ARHitResult> hitResults = arFrame.hitTest(motionEvent);
//Create an anchor at the detected hit location to enable the AR Engine to continuously track the location.
for (ARHitResult arHitResult : hitResults) {
    arHitResult.createAnchor();
}