responsive_image 0.1.0

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responsive_image #

A Flutter library that bring responsive capabilities to images.

Given a set of source URLs, the widget select the approriate source depending on the rendering size of the child widget, the pixel density of the device and a user defined scaling preference.

example staggered tiles

Features #

  • Automatic image source selection based on size and device pixel density
  • Adjustable scaling preference
  • Extendability and customization with builder

Example #

Basic usage:

ResponsiveImage(
  srcSet: {
    64: "https://via.placeholder.com/64",
    128: "https://via.placeholder.com/128",
    256: "https://via.placeholder.com/256",
    512: "https://via.placeholder.com/512",
  },
  scalePreference: ScalePreference.Upper,
);

Usage with builder for further customization of the displayed image:

ResponsiveImage(
  srcSet: {
    256: "https://via.placeholder.com/256",
    512: "https://via.placeholder.com/512",
    1024: "https://via.placeholder.com/1024",
  },
  builder: (BuildContext context, String url) {
    return CachedNetworkImage(
      imageUrl: url,
      placeholder: (context, url) => CircularProgressIndicator(),
      errorWidget: (context, url, error) => Icon(Icons.error),
    );
  },
);

[0.1.0] - 2019-11-09 #

  • Initial release. Automatic source selector, scale preferences and build delegate.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:responsive_image/responsive_image.dart';
import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';

void main() => runApp(App());

class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Responsive Image Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: HomePage(title: 'Responsive Image Demo'),
    );
  }
}

class HomePage extends StatelessWidget {
  final String title;

  final List<StaggeredTile> _staggeredTiles = const <StaggeredTile>[
    const StaggeredTile.count(2, 2),
    const StaggeredTile.count(1, 1),
    const StaggeredTile.count(1, 1),
    const StaggeredTile.count(1, 1),
    const StaggeredTile.count(1, 1),
    const StaggeredTile.count(4, 4),
    const StaggeredTile.count(2, 2),
    const StaggeredTile.count(2, 1),
    const StaggeredTile.count(1, 1),
    const StaggeredTile.count(1, 1),
  ];

  final Map<int, String> srcSet = {
    64: "https://via.placeholder.com/64",
    128: "https://via.placeholder.com/128",
    256: "https://via.placeholder.com/256",
    512: "https://via.placeholder.com/512",
    1024: "https://via.placeholder.com/1024",
  };

  HomePage({Key key, this.title}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text(title),
        ),
        body: StaggeredGridView.count(
          crossAxisCount: 4,
          staggeredTiles: _staggeredTiles,
          children: List<Widget>.generate(
              _staggeredTiles.length,
              (int index) => ResponsiveImage(
                    srcSet: srcSet,
                  )),
          mainAxisSpacing: 4.0,
          crossAxisSpacing: 4.0,
          padding: const EdgeInsets.all(4.0),
        ));
  }
}

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:


dependencies:
  responsive_image: ^0.1.0

2. Install it

You can install packages from the command line:

with Flutter:


$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:


import 'package:responsive_image/responsive_image.dart';
  
Popularity:
Describes how popular the package is relative to other packages. [more]
45
Health:
Code health derived from static analysis. [more]
100
Maintenance:
Reflects how tidy and up-to-date the package is. [more]
100
Overall:
Weighted score of the above. [more]
72
Learn more about scoring.

We analyzed this package on Mar 30, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.7.1
  • pana: 0.13.6
  • Flutter: 1.12.13+hotfix.8

Dependencies

Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11 1.14.12
meta 1.1.8
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies
flutter_test