Flutter OPPO Background GPS Tracking Demo (Price can be negotiated. Have experience on AMAP and Tecent/NetEase IM third-party sdks integration)

Brief Requirement: Build a Flutter demo for OPPO phones only, stable GPS location under lock screen, background run & normal power saving mode (system cannot kill tracking service). Deliverables: 1. Full reusable Flutter source code 2... (Budget: $10 - $1000 USD, Jobs: Android, Backend Development, Flutter, iOS Development, Mobile App Development, Mobile App Testing, PHP)