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Android 12 might bring setting system-wide themes across apps

An advantage of having system-wide support for colour accents would also mean that unlike theming engines like Substratum, themes will not be broken when an update changes an app's layout or interface

The accents might also work across apps, so you could probably theme WhatsApp and Instagram with one switch. The accents might also work across apps, so you could probably theme WhatsApp and Instagram with one switch.
The accents might also work across apps, so you could probably theme WhatsApp and Instagram with one switch. (9to5Google)

When it comes to customisation, there’s really no competition when it comes to Android, which has allowed users to switch out their default appls for the home screen launcher, voice assistants, dialer and messengers. If you’ve used a Pixel, the recently introduced icon and color accent changer will also seem familiar. However, a new report suggests that Google may be ready to kick its customisation chops to the next level in Android 12.

However, according to 9to5Google, Android 12 might introduce a systemwide accent ‘engine’ that will allow you to select a particular colour ‘accent’ and apply it system-wide. Unlike Substratum themes, which tell a specified list of apps that they ‘must’ use a certain colour, the solution on Android 12 would involve Android’s API telling apps installed on the phone that the user had selected, for example, the lavender accent. Apps could then choose to apply the colour across their app’s dialogs, buttons and menus.

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Another advantage of having system-wide support for colour accents would also mean that unlike Substratum, themes will not need to be updated when an app update changes settings and moved the user interface. Instead, app developers could update their interface and request the Android API what colour the user has chosen, then apply it in the new update. It remains to be seen whether this feature makes it into the final release version of Android or delayed for Android 13 next year, but the arrival of the first Developer Previews in February should give use a far idea of what it looks like.

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