Hide Navigation Bar

Gain access to your android device

1. adb connect {your device id} to connect to your device
2. adb shell to get into your device
3. grant write access to /system folder sudo mount -o rw,remount /system

Hide the navigation bar

1. Add qemu.hw.mainkeys = 1 at the end of the build.prop in /system
2. sudo mount -o ro,remount /system change /system back to read only
3. restart your device and you can see the navigation bar has disappeared~