Migrate to Jetpack Tile previews

[ithinkihaveacat]

This is a mostly mechanical change however there is one meaningful difference: previously the ImageResource passed to onTileResourceRequest() was passed through bitmapToImageResource(), where the Bitmap was extracted from the context via BitmapFactory.decodeResource(). I think this was mostly to demonstrate how to process a raw Bitmap.

However, with the new preview library, it's not possible to access the context (I think?), so we bypass this transformation step and instead generate the ImageResource via drawableResToImageResource() (which takes a resource id).

I think this is fine since the main point is to generate a preview rather than transform images from one format to another (the previews themselves are identical) but others may disagree!

Before ("compose"):

Before ("Wear tile services"):

After:

[yschimke]

The description doesn't match the PR

However, with the new preview library, it's not possible to access the context

When it clearly is.

[yschimke]

Nice

[yschimke]

Using drawableResToImageResource seems like an improvement.

You could consider inlining it if you want to minimise horologist usage here.

public fun drawableResToImageResource(
    @DrawableRes id: Int,
): ImageResource =
    ImageResource.Builder()
        .setAndroidResourceByResId(
            AndroidImageResourceByResId.Builder()
                .setResourceId(id)
                .build(),
        )
        .build()

[ithinkihaveacat]

I was considering an extension function to enable addIdToImageMapping() to take a DrawableRes or ImageResource:

fun ResourceBuilders.Resources.Builder.addIdToImageMapping(
    id: String,
    @DrawableRes resId: Int
): ResourceBuilders.Resources.Builder = addIdToImageMapping(
    id, ResourceBuilders.ImageResource.Builder()
        .setAndroidResourceByResId(
            ResourceBuilders.AndroidImageResourceByResId.Builder()
                .setResourceId(resId)
                .build()
        )
        .build()
)

Not sure whether this is idiomatic (versus the function approach) or whether it should be called addIdToResourceMapping(), etc. so was leaving it for a future PR.

[ithinkihaveacat]

Added enhanced addIdToImageMapping() in #1164.

[garanj]

Great!

[ithinkihaveacat]

The description doesn't match the PR

However, with the new preview library, it's not possible to access the context

When it clearly is.

I don't follow this! This is the issue I was getting with a more mechanical transformation:

[ithinkihaveacat]

The description doesn't match the PR

However, with the new preview library, it's not possible to access the context

When it clearly is.

I don't follow this! This is the issue I was getting with a more mechanical transformation:

Oh, there's a bug in the lint check. It's been reported.