huixiang_app/lib/view_widget/custom_image.dart

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:huixiang/utils/ImgCachePath.dart';
import 'package:network_to_file_image/network_to_file_image.dart';
import 'package:path/path.dart' as p;

class MImage extends StatelessWidget {
  final String src;
  final String errorSrc;
  final String fadeSrc;
  final BorderRadius radius;
  final double aspectRatio;
  final double? width;
  final double? height;
  final BoxFit fit;
  final bool isCircle;
  final bool noCompress;//不压缩图片

  final double scaleIndex = 1.5;

  const MImage(
      this.src, {
        this.errorSrc = "assets/image/default_2_1.webp",
        this.fadeSrc = "assets/image/default_2_1.webp",
        this.aspectRatio = 0,
        this.width,
        this.height,
        this.fit = BoxFit.cover,
        this.isCircle = false,
        this.noCompress = false,
        this.radius = BorderRadius.zero,
      });

  File fileFromDocsDir(String filename) {
    String pathName = p.join(ImgCachePath.instance.path, filename);
    return File(pathName);
  }

  double getImageWidth(context, double widgetWidth) {
    double width = MediaQuery.of(context).size.width;
    if (widgetWidth > 700) {
      return width;
    } else if (widgetWidth > 300) {
      return 700;
    } else {
      return 300;
    }
  }

  double getImageHeight(context, double widgetHeight) {
    if (widgetHeight > 700) {
      return 1000;
    } else if (widgetHeight > 300) {
      return 700;
    } else {
      return 300;
    }
  }

  @override
  Widget build(BuildContext context) {
    Widget image = LayoutBuilder(
      builder: (ctx, constraints) {
        String? imageUrl = "";
        ///压缩图片
        int _w = ((getImageWidth(ctx, constraints.constrainWidth())) * scaleIndex).toInt();
        int _h = ((getImageHeight(ctx, constraints.constrainHeight())) * scaleIndex).toInt();
        ///压缩图片
        if (src.startsWith("http")) {
          if (noCompress) {
            imageUrl = src;
          } else {
            imageUrl = "$src?imageView2/0/w/${_w}/format/jpg/q/100";
          }
        }

        // debugPrint("imageUrl: $imageUrl");

        if (imageUrl.isEmpty) {
          return Image.asset(
            "assets/image/default_2_1.webp",
            fit: fit,
          );
        }
        Widget? cachedNetworkImage;
        if (src.startsWith("http")) {
          cachedNetworkImage = Image(
            image: NetworkToFileImage(
              url: imageUrl,
              file: fileFromDocsDir("resize${(noCompress?"noCompress":"$_w$_h")}${src.replaceAll("https:", "")
                  .replaceAll("http:", "")
                  .replaceAll("pos.upload.gznl.top", "")
                  .replaceAll("/", "")}"),
              debug: true,
            ),
            errorBuilder: (context, error, stackTrace) {
              return Image.asset(
                errorSrc,
                fit: fit,
              );
            },
            fit: fit,
          );
        } else if (src.startsWith("file")) {
          cachedNetworkImage = Image.file(
            File(src),
            fit: fit,
            errorBuilder: (context, error, stackTrace) {
              return Image.asset(
                errorSrc,
                fit: fit,
              );
            },
          );
        }
        return cachedNetworkImage ?? Image.asset(
          "assets/image/default_2_1.webp",
          fit: fit,
        );
      },
    );
    var clipRRect;
    if (isCircle) {
      clipRRect = ClipOval(clipBehavior: Clip.antiAlias, child: image);
    } else {
      clipRRect = ClipRRect(
        borderRadius: radius,
        child: image,
      );
    }
    if (aspectRatio > 0) {
      return SizedBox(
        width: width,
        height: height,
        child: AspectRatio(
          aspectRatio: aspectRatio,
          child: clipRRect,
        ),
      );
    } else {
      return SizedBox(
        width: width,
        height: height,
        child: clipRRect,
      );
    }
  }
}