如何在安卓系统中自动保存OpenCV合成图片

import org.opencv.android.Utils;
import org.opencv.core.Mat;
import org.opencv.core.CvType;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.core.MatOfByte;
import org.opencv.core.MatOfInt;
import org.opencv.core.MatOfFloat;
import org.opencv.core.CvType;
import org.opencv.core.Core;
import org.opencv.imgproc.Imgproc;
import org.opencv.android.OpenCVLoader;

import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";
    private static final int REQUEST_PERMISSION = 1;

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

        // 检查存储权限
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
                != PackageManager.PERMISSION_GRANTED) {
            // 请求存储权限
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                    REQUEST_PERMISSION);
        } else {
            // 执行图片合成和保存操作
            performImageProcessing();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == REQUEST_PERMISSION) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                // 存储权限已授予，执行图片合成和保存操作
                performImageProcessing();
            } else {
                // 存储权限被拒绝，显示一个提示或执行其他操作
                Log.e(TAG, "存储权限被拒绝");
            }
        }
    }

    private void performImageProcessing() {
        // 加载图片
        Mat image1 = Utils.loadResource(this, R.drawable.image1, CvType.CV_8UC4);
        Mat image2 = Utils.loadResource(this, R.drawable.image2, CvType.CV_8UC4);

        // 图片合成
        Mat result = new Mat();
        Core.addWeighted(image1, 0.5, image2, 0.5, 0, result);

        // 保存图片
        saveImage(result);
    }

    private void saveImage(Mat image) {
        // 创建保存路径
        File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
        File file = new File(path, "opencv_composite.jpg");

        // 转换图片格式
        MatOfInt params = new MatOfInt(Imgcodecs.IMWRITE_JPEG_QUALITY, 100);
        Imgcodecs.imwrite(file.getAbsolutePath(), image, params);

        Log.i(TAG, "图片保存成功：" + file.getAbsolutePath());
    }
}