如何在Chaquopy中使用OpenCV等待键

dependencies {
    implementation 'org.opencv:opencv-android:3.4.1'
}

import org.opencv.android.OpenCVLoader;

public class MainActivity extends AppCompatActivity {

    static {
        if (!OpenCVLoader.initDebug()) {
            // OpenCV initialization failed
        }
    }

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

        // Other code
    }
}

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.videoio.VideoCapture;

public class MainActivity extends AppCompatActivity {

    // Other code

    private void waitForKeypress() {
        VideoCapture capture = new VideoCapture(0); // Open default camera
        Mat frame = new Mat();

        while (true) {
            capture.read(frame);
            Core.putText(frame, "Press any key to continue", new Point(10, 30), Core.FONT_HERSHEY_SIMPLEX, 1, new Scalar(255, 255, 255), 2);

            // Show the frame on screen
            // ...

            int key = Core.waitKey(1); // Wait for 1 millisecond

            if (key != -1) {
                // Key pressed, break the loop
                break;
            }
        }

        capture.release();
    }
}