mMDT5_GreenWatch/app/src/main/java/com/example/greenwatch/VideodetectionActivity.java

package com.example.greenwatch;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class VideodetectionActivity extends AppCompatActivity {

    private Button backToMainActivity;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_videodetection);

        backToMainActivity = (Button) findViewById(R.id.videodetectorBackToMainActivity);

        backToMainActivity.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }
}