如何在没有bitmap.compress方法的情况下将位图写入文件

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;

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

public class BitmapWriter {

    public static void writeBitmapToFile(Bitmap bitmap, String filePath) {
        // 获取位图的宽度和高度
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();

        // 创建字节数组，用于存储位图的像素信息
        int[] pixels = new int[width * height];
        bitmap.getPixels(pixels, 0, width, 0, 0, width, height);

        // 创建字节数组，用于存储位图的像素信息
        byte[] bytes = new byte[width * height * 4];

        // 将位图的像素信息转换为字节数组
        for (int i = 0; i < pixels.length; i++) {
            int pixel = pixels[i];
            bytes[i * 4] = (byte) Color.red(pixel);
            bytes[i * 4 + 1] = (byte) Color.green(pixel);
            bytes[i * 4 + 2] = (byte) Color.blue(pixel);
            bytes[i * 4 + 3] = (byte) Color.alpha(pixel);
        }

        // 将字节数组写入文件
        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream(new File(filePath));
            fos.write(bytes);
            fos.flush();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}