It's a plugin that generates an asset index which we can easily find.It can be used on Android Studio or Idea.

How to use

1.Configuring paths in pubspec.yaml

Plugin now supports automatic configuration:

• Right-click on folder or file, then click
  Flutter: Configuring Paths.
  

2.Generate file

You can generate file by these ways:

• Build => Generate Flutter Assets
  
• Press Option(mac)/Alt(win) + G,It will generate assets.dart on lib/generated.

Simply use it like:

Image.asset(
          Assets.imageLoading,
          width: 24,
          height: 24,
          fit: BoxFit.contain,
        )

3.Extras

• You can locate file quickly by click line-marker.
  
• Plugin will observe your changes on assets path and update file.
  

Settings

Global

Preferences => Tools => FlutterAssetsGenerator

Module based

You can change default settings by add following contents in your pubspec.yaml.

flutter_assets_generator:
  # Optional. Sets the directory of generated localization files. Provided value should be a valid path on lib dir. Default: generated
  output_dir: generated
  # Optional. Sets whether utomatic monitoring of file changes. Default: true
  auto_detection: true
  # Optional. Sets file name conversion rules. Default: true
  named_with_parent: true
  # Optional. Sets the name for the generated localization file. Default: assets
  output_filename: assets
  # Optional. Sets the name for the generated localization class. Default: Assets
  class_name: Assets
  # Optional. Sets the filename split pattern for filename split. Default: [-_]
  filename_split_pattern: "[-_]"
  # Optional. Configuring ignore paths. Default: [],e.g: ["assets/fonts", "assets/images/dark", ...]
  path_ignore: []