OPFPControl

A simple app that makes use of Android's Runtime Resource Overlay (RRO) framework to customize the OnePlus 6T's in-display fingerprint scanner icon.

Features

Change the "Normal"-state icon to any image (non-square images will be stretched).
Change the "Disabled"-state icon to any image (same limitation as above).
Change the tint color of the chosen "Normal"-state icon.
Change the tint color of the chosen "Disabled"-state icon.
Toggle the scanning animation.

This app installs the overlay to:

/system_root/system/app/com.android.systemui.opfpcontrol.fp.overlay/

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