Access graphics from drawable folder of a dynamic feature module from main module

Question

I'm getting my feet wet with dynamic module split API delivery in order to break up my game app into Instant and Installable versions. I've been following the Codelabs tutorial here https://codelabs.developers.google.com/codelabs/on-demand-dynamic-delivery/index.html#0. Unfortunately it uses Kotlin for the MainActivity code, which is less specific than Java, but still fairly followable if you've done a Kotlin tutorial. The example includes accessing a text tile in an 'assets' folder in an 'assets' feature module with the following:

private const val packageName = "com.google.android.samples.dynamicfeatures.ondemand"

val assetManager = createPackageContext(packageName, 0).assets
// Now treat it like any other asset file.
val assets = assetManager.open("assets.txt")
val assetContent = assets.bufferedReader()
           .use {
               it.readText()
           }

For now I just want to access graphic files in a drawable folder of my dynamic feature module. I'll only be using my dynamic feature module to store large graphics that would take me over the 10 MG limit for an Instant app download. What would be the cleanest way to do this?

Main 'app' module:

Java code in 'app':

loadTexture(R.drawable.aaa_image);

Bitmap bitmap;
public void loadTexture(final int resourceId){
    bitmap = BitmapFactory.decodeResource(context.getResources(), resourceId, options);
    ***

Dynamically delivered 'installationassets' module:

Still java code in 'app', won't reach:

 loadTexture(R.drawable.testgraphic);
 cannot resolve symbol 'testgraphic'

Answer 1

I found a working solution to load drawables from a feature module resources. The trick is to use the correct package name for the module.

Example:

• base module package name is "com.project"
• feature module name defined in build.gradle "FeatureModule"
• feature module package name "com.project.FeatureModule"

build.gradle

dynamicFeatures = [":FeatureModule"]

Java

int drawableResId = context.getResources().getIdentifier("your_drawable_name", "drawable", "com.project.FeatureModule");
context.getDrawable(drawableResId);

Reference article