如何在Android中使用Opencv旋转图像而不进行裁剪？

import org.opencv.android.Utils;
import org.opencv.core.CvType;
import import org.opencv.core.Mat;
import org.opencv.core.Point;
import org.opencv.core.Size;
import org.opencv.imgproc.Imgproc;

// 加载OpenCV库
static {
    System.loadLibrary("opencv_java");
}

// 旋转图像的方法
public Mat rotateImage(Mat inputImage, double angle) {
    // 获取图像的宽度和高度
    int width = inputImage.width();
    int height = inputImage.height();

    // 计算旋转中心点坐标
    Point center = new Point(width / 2, height / 2);

    // 创建旋转矩阵
    Mat rotationMatrix = Imgproc.getRotationMatrix2D(center, angle, 1.0);

    // 计算旋转后的图像大小
    double cos = Math.abs(rotationMatrix.get(0, 0)[0]);
    double sin = Math.abs(rotationMatrix.get(0, 1)[0]);
    int newWidth = (int) (width * cos + height * sin);
    int newHeight = (int) (width * sin + height * cos);

    // 进行透视变换
    Mat rotatedImage = new Mat(new Size(newWidth, newHeight), CvType.CV_8UC3);
    Imgproc.warpAffine(inputImage, rotatedImage, rotationMatrix, rotatedImage.size());

    return rotatedImage;
}

// 在Android中使用OpenCV旋转图像的示例
public void rotateImageExample() {
    // 加载图像
    Mat inputImage = Utils.loadResource(this, R.drawable.input_image, Imgcodecs.CV_LOAD_IMAGE_COLOR);

    // 旋转图像
    double angle = 45.0; // 旋转角度
    Mat rotatedImage = rotateImage(inputImage, angle);

    // 显示旋转后的图像
    Bitmap rotatedBitmap = Bitmap.createBitmap(rotatedImage.cols(), rotatedImage.rows(), Bitmap.Config.ARGB_8888);
    Utils.matToBitmap(rotatedImage, rotatedBitmap);
    imageView.setImageBitmap(rotatedBitmap);
}