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When you’re ready to create an app,get the SDK and tools for your app type.If you aren’t sure which tools you need, get the Flutter SDK.
Version note: As of Flutter 1.21, the Flutter SDK includes the full Dart SDK.
General-purpose tools
The following tools support the Dart language on all platforms.
DartPad
DartPad isa great, no-download-required way to learn Dart syntaxand to experiment with Dart language features.It supports Dart’s core libraries,except for VM libraries such as dart:io.
IDEs and editors
Dart plugins exist for these commonly used IDEs.
The following Dart plugins are also available,thanks to the Dart community.
A Language Server Protocol implementation is also available forLSP-capable editors that don’t have specific Dart extensions.
Command-line tools
The Dart SDK includes the following general-purpose tools:
Some additional tools are available in packages.To install these tools, use the
pub command, as described in each tool’sinstallation instructions.Here are the general-purpose tools you might want to install:
Debugging
Tools for developing web apps
The following tools support developing web apps:
Tools for developing command-line apps and servers
The following tools support developing or runningcommand-line apps and servers:
Installation and setup
Follow the Set up an editor instructions toinstall the Dart and Flutter extensions(also called plugins).
Updating the extension
Updates to the extensions are shipped on a regular basis.By default, VS Code automatically updates extensions whenupdates are available.
To install updates manually:
Creating projects
There are a couple ways to create a new project.
Creating a new project
To create a new Flutter project from the Flutterstarter app template:
Opening a project from existing source code
To open an existing Flutter project:
Editing code and viewing issues
The Flutter extension performs code analysis thatenables the following:
Running and debugging
Note: You can debug your app in a couple of ways.
The instructions below describe features available in VS Code. For information on using launching DevTools, see Running DevTools from VS Code in the DevTools docs.
Start debugging by clicking Run > Start Debuggingfrom the main IDE window, or press
F5 .
Selecting a target device
When a Flutter project is open in VS Code,you should see a set of Flutter specific entries in the status bar,including a Flutter SDK version and adevice name (or the message No Devices):
Note:
The Flutter extension automatically selects the last device connected.However, if you have multiple devices/simulators connected, clickdevice in the status bar to see a pick-listat the top of the screen. Select the device you want to use forrunning or debugging.
Note: If you want to try running your app on the web, but the Chrome (web) target doesn’t appear in the list of targets, make sure you’ve enabled web, as described in Building a web application.
Run app without breakpoints
Run app with breakpoints
Run app in debug, profile, or release mode
Flutter offers many different build modes to run your app in. You can read more about them in Flutter’s build modes.
Fast edit and refresh development cycle
Flutter offers a best-in-class developer cycle enabling youto see the effect of your changes almost instantly with theStateful Hot Reload feature. SeeUsing hot reload for details.
Advanced debuggingDebugging visual layout issues
During a debug session,several additional debugging commands are added to theCommand Palette and to the Flutter inspector.When space is limited, the icon is used as the visualversion of the label.
Debugging external libraries
By default, debugging an external library is disabledin the Flutter extension. To enable:
Editing tips for Flutter code
If you have additional tips we should share, let us know!
Assists & quick fixes
Assists are code changes related to a certain code identifier.A number of these are available when the cursor is placed on aFlutter widget identifier, as indicated by the yellow lightbulb icon.The assist can be invoked by clicking the lightbulb, or by using thekeyboard shortcut
Ctrl +. (Cmd +. on Mac), as illustrated here:
Quick fixes are similar,only they are shown with a piece of code has an error and theycan assist in correcting it.
Snippets![]()
Snippets can be used to speed up entering typical code structures.They are invoked by typing their prefix,and then selecting from the code completion window:
The Flutter extension includes the following snippets:
You can also define custom snippets by executingConfigure User Snippets from the Command Palette.
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