Since it's hard to find some up-to-date guides for Google Camera on A2 Lite in 2021, I just wanted to share the latest info.
GCam 8.2 by the_dise appears to be fully compatible. There is only a small caveat: HDR+ and portrait mode are unsupported on the front camera, so having them on while using the front camera will silently fail.
Photo quality is better with GCam when you focus on the details, and especially night photos are unbelievably better. If you take pictures in the dark, it's a must.
For completeness -- it is necessary to have the Camera2 API enabled in order for GCam to work. Custom ROMs usually have this switch in settings (or even a QS tile), usually titled "Camera HAL", which you need to set to "HAL3". To enable it on the stock ROM, follow this guide by @h3r0n, but use this patched_boot.img by @Antho02 for the latest (11.0.18.0) firmware.
GCam 8.2 by the_dise appears to be fully compatible. There is only a small caveat: HDR+ and portrait mode are unsupported on the front camera, so having them on while using the front camera will silently fail.
Photo quality is better with GCam when you focus on the details, and especially night photos are unbelievably better. If you take pictures in the dark, it's a must.
For completeness -- it is necessary to have the Camera2 API enabled in order for GCam to work. Custom ROMs usually have this switch in settings (or even a QS tile), usually titled "Camera HAL", which you need to set to "HAL3". To enable it on the stock ROM, follow this guide by @h3r0n, but use this patched_boot.img by @Antho02 for the latest (11.0.18.0) firmware.