External Asset Bundle
The External Asset Bundle package works exactly like a
DefaultAssetBundle, but loads resources from an external location like the application or library path. It also implements caching for resource loading.
It's very useful if you want to use resources from a folder that is temporary or located on external storage.
You can use
Image.asset to create an
Image instance as the default bundle does:
var externalAssetBundle = ExternalAssetBundle("download/folder/assets"); var image = Image.asset( "sample.png", bundle: externalAssetBundle, //Don't forget to use your own AssetBundle! );
Or load a string file from the path very easily:
var stringContent = externalAssetBundle.loadString("some-text-file.txt");
ExternalAssetBundle implements the abstract class of
AssetBundle, so it should work every place that needs an
Additionaly, you won't need to predefine your folder structure in the
pubspec.yaml file. The folder structure is obtained dynamically. But you still need to follow the rules for constructing the default assets folder.
Read more: Assets and Images
Add external_asset_bundle as dependency to your pubspec file.
The only thing you need to do is to create an
import 'package:external_asset_bundle/external_asset_bundle.dart'; var externalAssetBundle = ExternalAssetBundle("path/to/any/folder");
You can use it as any AssetBundle:
var image = Image.asset( "sample.png", bundle: externalAssetBundle, ); var stringContent = externalAssetBundle.loadString("some-text-file.txt");
If you manage your folder structure like this:
asset-folder/sample.png asset-folder/2.0x/sample.png asset-folder/3.0x/sample.png
The variant could be correctly found by
The resources could be cached by initializing the
ExternalAssetBundle with the
enableBinaryCache parameter on:
var externalAssetBundle = ExternalAssetBundle("path", enableBinaryCache:true);
loadString will use its own
cache paramter to determine whether to use the caching.
Please report issues on my Github page!