Android: load model from assets

[Bludator]

🚀 The feature, motivation and pitch

It is simple, there is no way to read model directly from assets. The assets are files bundled in the Android apps.
The assets are not handled the same way as regular files -- they can be accessed only through assets manager.

Alternatives

As a workaround, the model could be loaded from assets and stored into regular file which is then read by the ExecuTorch

val file = File(context.filesDir, modelName)
context.assets.open(modelAssetsPath).use { inputStream ->
	FileOutputStream(file).use { outputStream ->
		inputStream.copyTo(outputStream)
	}
}

// here we can initialize the model
val model = Module.load(file.absolutePath)

Additional context

There is generally two way how it could look like:

• initialization from ByteArray(Kotlin) / byte[] (Java) like in ONNX runtime
• directly from the assets using asset path and assets manager as parameters like done in LiteRT/TFLite.

RFC (Optional)

No response

[SS-JIA]

@kirklandsign - would you be able to take a look at this?