huixiang_app/lib/view_widget/custom_image.dart

import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter_cache_manager/flutter_cache_manager.dart';
import 'package:flutter/material.dart';

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;

  double scaleIndex = 3.5;

  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,
  });

  @override
  Widget build(BuildContext context) {
    Widget image = LayoutBuilder(builder: (context, constraints) {
      String imageUrl = "";
      if (src != null && src != "") {
        imageUrl = "$src?imageMogr2/thumbnail/${constraints.constrainWidth() * scaleIndex}"
            "x${constraints.constrainHeight() * scaleIndex}/format/webp/blur/1x0/quality/75";
      }
      if (imageUrl == null || imageUrl == "") {
        return Image.asset(
          "assets/image/default_2_1.png",
          fit: fit,
        );
      }
      return CachedNetworkImage(
        imageUrl: imageUrl,
        cacheManager: DefaultCacheManager(),
        fadeInDuration: Duration(milliseconds: 300),
        fadeOutDuration: Duration(milliseconds: 300),
        imageBuilder: (context, provide) {
          return Image(
            image: provide,
            fit: fit,
          );
        },
        errorWidget: (context, error, stackTrace) {
          return Image.asset(
            errorSrc,
            fit: fit,
          );
        },
        placeholder: (context, placeholder) {
          return Image.asset(
            fadeSrc,
            fit: fit,
          );
        },
      );
    });

    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,
      );
    }
  }
}