Here’s my build of LineageOS 20 Android TV for Raspberry Pi 4 Model B, Pi 400, and Compute Module 4. It is unofficial and unsupported by the LineageOS team. It’s for advanced users only. Pi 4 model with at least 2GB of RAM is required to run this build.

Important! This image includes parts that are licensed under non-commercial license (Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International). You may use this build freely in personal/educational/etc use. Commercial use is not allowed with this build! You can contact me by email to discuss creating customized Android builds for commercial purposes.

screenshot

Do not mirror my builds! Please post a link to this page instead.

lineage-20.0-20230505-UNOFFICIAL-KonstaKANG-rpi4-atv.zip
https://www.androidfilehost.com/?fid=10620683726822051673
md5:ad9ce7d7911e60ed182fdd188ff1300c

lineage-20.0-20230505-UNOFFICIAL-KonstaKANG-rpi4-atv-ota.zip (TWRP flashable OTA package)
https://www.androidfilehost.com/?fid=10620683726822051671
md5:9aa7e14fd458826a8d46c13f4c7f13af

Working:

Audio (HDMI, 3.5mm jack, USB microphones, bluetooth speakers/headphones, etc)
Audio DAC (using GPIO DACs e.g. Hifiberry DAC+)
Bluetooth (and bluetooth tethering)
Camera (using official Pi camera modules & UVC USB webcams)
GPIO
GPS (using external USB modules e.g. U-Blox 7)
Ethernet
Hardware accelerated graphics (V3D, OpenGL & Vulkan)
Hardware video decoding & encoding (H.265 decoding, H.264 decoding & encoding)
HDMI display (and HDMI-CEC)
I2C
IR remotes (using external GPIO IR modules e.g. TSOP4838)
RTC (using external GPIO I2C modules e.g. DS3231)
Sensors (using external GPIO I2C modules e.g. MPU6050, LSM6DS3, LSM303DLHC, BME280/BMP280, and APDS9930 accelerometer, gyroscope, magnetometer, temperature, pressure, humidity, ambient light, and proximity)
Serial console (using external GPIO serial console adapters e.g. PL2303)
SPI
Touchscreen/multi-touch (official 7” touchscreen, USB touchscreens, Waveshare SPI touchscreens)
USB (mouse, keyboard, storage, etc)
USB-C (ADB, MTP, PTP, USB tethering)
Wifi (and wifi tethering)
Issues:

Chromecast functionality is not supported on uncertified Android TV devices
Hardware video decoding performance varies depending on the selected decoder option and video resolution/bitrate/profile/container/etc
Some third party camera apps don’t work with official Pi camera modules (works with UVC USB webcams)
SELinux is in permissive mode
Encrypting userdata is not supported
and more…
Sources:

kernel
Thanks:

Roman Stratiienko and GloDroid project
Peter Yoon and android-rpi project
AOSP reference board developers (dragonboard, hikey, yukawa)
Android-x86 project
LineageOS team and everyone who has contributed to LineageOS 20