Create a project (with all the files..)

flutter create /path/to/newdir
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build 
build: (PWD== working dir)
flutter create apk

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Set up emulators
flutter emulators
1 available emulator:

Nexus_6_API_28 • Nexus 6 • Google • Nexus 6 API 28

To run an emulator, run 'flutter emulators --launch <emulator id>'.
To create a new emulator, run 'flutter emulators --create [--name xyz]'.

You can find more information on managing emulators at the links below:
  https://developer.android.com/studio/run/managing-avds
  https://developer.android.com/studio/command-line/avdmanager
 flutter emulator --launch Nexus_6_API_28
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test run:

flutter run

(press 'r') - triggers the hot reload

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emulator embedded?

Xvfb :2 -screen 0 1024x768x24 > /dev/null 2>&1 &
x11vnc -display :2 -quiet -nopw
DISPLAY=:2  ~/Android/Sdk/emulator/emulator -avd Nexus_6_API_28

// this bti can use vnc-gtk...
vncviewer localhost:0