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to see the effect of your changes almost instantly with the
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stateful hot reload feature.
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to learn more, check out hot reload.
|
<topic_end>
|
<topic_start>
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advanced debugging
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you might find the following advanced debugging tips useful:
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<topic_end>
|
<topic_start>
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debugging visual layout issues
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during a debug session,
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several additional debugging commands are added to the
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command palette and to the flutter inspector.
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when space is limited, the icon is used as the visual
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version of the label.
|
<topic_end>
|
<topic_start>
|
debugging external libraries
|
by default, debugging an external library is disabled
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in the flutter extension. to enable:
|
<topic_end>
|
<topic_start>
|
editing tips for flutter code
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if you have additional tips we should share, let us know!
|
<topic_end>
|
<topic_start>
|
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 a
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flutter widget identifier, as indicated by the yellow lightbulb icon.
|
to invoke the assist, click the lightbulb as shown in the following screenshot:
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you can also press ctrl / cmd + .
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quick fixes are similar,
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only they are shown with a piece of code has an error and they
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can assist in correcting it.
|
<topic_end>
|
<topic_start>
|
snippets
|
snippets can be used to speed up entering typical code structures.
|
they are invoked by typing their prefix,
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and then selecting from the code completion window:
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the flutter extension includes the following snippets:
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you can also define custom snippets by executing
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configure user snippets from the command palette.
|
<topic_end>
|
<topic_start>
|
keyboard shortcuts
|
you can also press ctrl + f5
|
(cmd + f5 on macOS).
|
keyboard mappings can be changed by executing the
|
open keyboard shortcuts command from the command palette.
|
<topic_end>
|
<topic_start>
|
hot reload vs. hot restart
|
hot reload works by injecting updated source code files into the
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running dart VM (virtual machine). this includes not only
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adding new classes, but also adding methods and fields to
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existing classes, and changing existing functions.
|
a few types of code changes cannot be hot reloaded though:
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for these changes, restart your app without
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ending your debugging session. to perform a hot restart,
|
run the flutter: hot restart command from the command palette.
|
you can also press
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ctrl + shift + f5
|
or cmd + shift + f5 on macOS.
|
<topic_end>
|
<topic_start>
|
troubleshooting
|
<topic_end>
|
<topic_start>
|
known issues and feedback
|
all known bugs are tracked in the issue tracker:
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dart and flutter extensions GitHub issue tracker.
|
we welcome feedback,
|
both on bugs/issues and feature requests.
|
prior to filing new issues:
|
when filing new issues, include flutter doctor output.
|
<topic_end>
|
<topic_start>
|
DevTools
|
<topic_end>
|
<topic_start>
|
what is DevTools?
|
DevTools is a suite of performance and debugging tools
|
for dart and flutter.
|
for a video introduction to DevTools, check out
|
the following deep dive and use case walkthrough:
|
dive in to DevTools
|
<topic_end>
|
<topic_start>
|
what can i do with DevTools?
|
here are some of the things you can do with DevTools:
|
we expect you to use DevTools in conjunction with
|
your existing IDE or command-line based development workflow.
|
<topic_end>
|
<topic_start>
|
how to start DevTools
|
see the VS code, android Studio/IntelliJ, or
|
command line pages for instructions on how to start DevTools.
|
<topic_end>
|
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