Incorrect Uri scheme for local app assets

[davidschreiber]

Android assets may be accessed using an Uri of this format file:///android_asset/... but Fresco uses the asset://... scheme which leads to incompatibility with other solutions.

E.g. when switching using Square's Picasso with Fresco, all Uris need to be changed to work with Fresco.

[plamenko]

file:///android_asset is only for use with WebView. For example, Universal Image Loader uses assets://image.png. So, I'm afraid there is no standard convention here. The fact that FileInputStream cannot open /android_asset/... is enough to disqualify the file scheme from being used for this purpose.

[anotherdev]

Fresco should support file:///android_asset/ instead of creating new scheme and don't documented clearly that asset:// scheme is vendor specific.

Picasso: square/picasso#332
Glide: http://stackoverflow.com/questions/29982341/using-glide-for-android-how-do-i-load-images-from-asset-and-resources