How to solve [error: cannot find symbol public class UnityPlayerActivity extends Activity implements IUnityPlayerLifecycleEvents]

  Kiến thức lập trình

i am doing a project that need to integrate the unity vuforia ar to flutter. I having the error as follow. Anyone can help please?
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I have follow steps from to do the export and import and to solve the aar file not found problem. Then, this error occur.

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