isFirstInstance function

Future<bool> isFirstInstance([ List<String>? args ])

Returns whether the current process is the only instance of the app running. If it returns false, another process is already running; the command line arguments passed in as args will be forwarded to the previous instance to be processed by the onSecondInstance() callback.

void main(List<String> args) async {
  if (await isFirstInstance(args)) {
    onSecondInstance((args) => print("Args: ${args}"));
    print("We are the first instance");
  } else {
    print("Another instance of this application is running");
  }
}

Implementation

Future<bool> isFirstInstance([List<String>? args]) {
  return InstanceController.instance.checkFirstInstance(args ?? []);
}