Support for themed app icons (Android 13+)

[linuslabo]

It would be great to have support for Android 13+ themed Icons, as promoted here and with more details here

It should be sufficient to add a monochromatic version of the icon and generate the corresponding drawable:

<?xml version="1.0" encoding="utf-8"?>
...
<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
    <background android:drawable="@drawable/ic_launcher_background" />
    <foreground android:drawable="@drawable/ic_launcher_foreground" />

    // Starting with Android 13 (API level 33), you can opt-in to providing a
    // <monochrome> drawable.
    <monochrome android:drawable="@drawable/ic_launcher_monochrome" />
</adaptive-icon>
...

[SoCuul]

Is there a possibility of this being implemented?

[orjandh]

This should be simple if we can provide a icon-monochrome.png and it just applies the same resizing logic and outputs the icons as ic_launcher_monochrome.png and adds it to ic_launcher.xml.

[borgoat]

I've been looking into this, and trying to implement something, but I'd like to share my initial findings because I'm not quite sure what the best approach could be. I found a few different strategies:

• Using <monochrome android:drawable="@drawable/ic_launcher_foreground" /> works for our app icon. Our foreground icon is a "monochrome" image, in the sense that it's of a single colour, but that colour is not #000000. I'm not sure what Android did, but it looks like it applies a threshold, and in the end shows it correctly. Converting the logo to full black has the same result. I thought it could be used as a default^1 if the user does not provide a monochrome icon, but probably it would not apply to everyone.
• Another idea, would be to try to use Sharp (and maybe add some CLI options), to let users apply a custom threshold/grayscale. Again with the idea of allowing this to work in "simple mode", and still having a default fallback behaviour.
• Finally, probably the most scalable and flexible solution, but also most complex, would be to allow a new android/icon-monochrome icon to be provided as input^2. However, this does require some rethinking when it comes to the ic_launcher.xml generation^1, as now the <monochrome /> element should only be created on demand.

It'd be great to hear from the Ionic team! Then I'm happy to implement this

[reslear]

there's no way to make it happen now, is there?