Display Manager for Android

- Launch any application on any external display in full screen
- Fully customizable resolution, scaling, DPI, and rotation for any display
- Reset any per-display configuration back to system defaults
- Built-in on-screen touchpad and keyboard for controlling any display
- Touchpad control with support for multi-touch, rotation, digitizer only mode
- External input device to display routing per input and display combination
- Navigation controls including Back and Home buttons for content on external displays
- Turning off built-in screen while keeping external displays active
- Managed virtual display mode with customizable on-screen keyboard routing and window behavior

Accessibility Service API may be used to support additional features on external displays. With your consent, it can:
- Simulate navigation actions for the on-screen touchpad and floating button
- Draw the on-screen cursor
- Read window details to direct your input to the focused window on the correct display
This information is used only on your device and is never collected, stored, or shared.

Source: https://github.com/jqssun/android-display-mirror