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;
  double width;
  double height;
  final BoxFit fit;
  final bool isCircle;

  double scaleIndex = 2.5;

  MImage(
    this.src, {
    this.errorSrc = "assets/image/default_2_1.png",
    this.fadeSrc = "assets/image/default_2_1.png",
    this.aspectRatio,
    this.width,
    this.height,
    this.fit,
    this.isCircle = false,
    this.radius = BorderRadius.zero,
  });

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

  @override
  Widget build(BuildContext context) {
    Widget image = LayoutBuilder(
      builder: (context, constraints) {
        String imageUrl = "";
        ///压缩图片
        // if (src != null && src != "" && src.startsWith("http")) {
          // String oper = src.contains("?") ? "" :"?";
          // imageUrl =
          //     "$src$oper/imageMogr2/thumbnail/${constraints.constrainWidth() * scaleIndex}"
          //     "x${constraints.constrainHeight() * scaleIndex}/format/webp/quality/100";
        // }
        int _w = ((constraints.constrainWidth()==double.infinity?
        MediaQuery.of(context).size.width:constraints.constrainWidth()) * scaleIndex).toInt();
        int _h = ((constraints.constrainHeight()==double.infinity?
        MediaQuery.of(context).size.height:constraints.constrainHeight()) * scaleIndex).toInt();
        ///压缩图片
        if ((src??"").startsWith("http")) {
          imageUrl = "$src?imageView2/1/w/${_w}/h/${_h}/format/jpg/q/75";
        }

        // print("imageUrl:$imageUrl");
        // print("constrainWidth: ${constraints.constrainWidth()}");
        // print("constrainHeight: ${constraints.constrainHeight()}");

        if (imageUrl == null || imageUrl == "") {
          return Image.asset(
            "assets/image/default_2_1.png",
            fit: fit,
          );
        }
        Widget cachedNetworkImage;
          if (src.startsWith("http")) {
            cachedNetworkImage = Image(
              image: ResizeImage(NetworkToFileImage(
                url: imageUrl,
                file: fileFromDocsDir("resize"+src.replaceAll("https:", "")
                    .replaceAll("http:", "")
                    .replaceAll("pos.upload.gznl.top", "")
                    .replaceAll("/", "")),
                debug: true,
              ),
                width: _w,
                height: _h),
              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;
      },
    );

    var clipRRect;
    if (isCircle) {
      clipRRect = ClipOval(clipBehavior: Clip.antiAlias, child: image);
    } else {
      clipRRect = ClipRRect(
        borderRadius: radius,
        child: image,
      );
    }
    if (aspectRatio != null && aspectRatio > 0) {
      return Container(
        child: AspectRatio(
          aspectRatio: aspectRatio,
          child: clipRRect,
        ),
      );
    } else {
      return Container(
        width: width,
        height: height,
        child: clipRRect,
      );
    }
  }
}