2019-04-19 15:50:30 +00:00
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# Flutter Attach
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## Overview
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A Flutter-command that attaches to applications that have been launched
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without `flutter run` and provides a HotRunner (enabling hot reload/restart).
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## Usage
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2020-07-23 01:31:12 +00:00
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There are three ways for the attach command to discover a running app:
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2019-04-19 15:50:30 +00:00
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1. If the platform is Fuchsia the module name must be provided, e.g. `$
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flutter attach --module=mod_name`. This can be called either before or after
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the application is started, attach will poll the device if it cannot
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immediately discover the port
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2020-03-25 23:45:49 +00:00
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1. On Android and iOS, just running `flutter attach` suffices. Flutter tools
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will search for an already running Flutter app or module if available.
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Otherwise, the tool will wait for the next Flutter app or module to launch
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before attaching.
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1. If the app or module is already running and the specific observatory port is
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known, it can be explicitly provided to attach via the command-line, e.g.
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`$ flutter attach --debug-port 12345`
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2019-04-19 15:50:30 +00:00
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## Source
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See the [source](https://github.com/flutter/flutter/blob/master/packages/flutter_tools/lib/src/commands/attach.dart) for the attach command.
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