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Troubleshooting some standard issues
Question: My app looks janky or stutters.
How do I fix it?Answer: Performance issues can cause UI frames
to be janky and/or slow down some operations.For more information, check out the
Performance page.Question: I see a lot of garbage collection (GC) events occurring.
Is this a problem?Answer: Frequent GC events might display on
the DevTools > Memory > Memory chart. In most cases,
it’s not a problem.If your app has frequent background activity with some idle time,
Flutter might use that opportunity to collect the created objects
without performance impact.<topic_end>
<topic_start>
Providing feedback
Please give DevTools a try, provide feedback, and file issues
in the DevTools issue tracker. Thanks!<topic_end>
<topic_start>
Other resources
For more information on debugging and profiling
Flutter apps, see the Debugging page and,
in particular, its list of other resources.For more information on using DevTools with Dart command-line apps, see the
DevTools documentation on dart.dev.
<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>
<topic_start>
Troubleshooting some standard issues
Question: My app looks janky or stutters.
How do I fix it?Answer: Performance issues can cause UI frames
to be janky and/or slow down some operations.For more information, check out the
Performance page.Question: I see a lot of garbage collection (GC) events occurring.
Is this a problem?Answer: Frequent GC events might display on
the DevTools > Memory > Memory chart. In most cases,
it’s not a problem.If your app has frequent background activity with some idle time,
Flutter might use that opportunity to collect the created objects
without performance impact.<topic_end>
<topic_start>
Providing feedback
Please give DevTools a try, provide feedback, and file issues
in the DevTools issue tracker. Thanks!<topic_end>
<topic_start>
Other resources
For more information on debugging and profiling
Flutter apps, see the Debugging page and,
in particular, its list of other resources.For more information on using DevTools with Dart command-line apps, see the
DevTools documentation on dart.dev.
<topic_end>
<topic_start>Install and run DevTools from Android Studio
<topic_end>
<topic_start>
Install the Flutter plugin
Install the Flutter plugin if you don’t already have it installed.
This can be done using the normal Plugins page in the IntelliJ
and Android Studio settings. Once that page is open,
you can search the marketplace for the Flutter plugin.<topic_end>
<topic_start>
Start an app to debug
To open DevTools, you first need to run a Flutter app.
This can be accomplished by opening a Flutter project,
ensuring that you have a device connected,
and clicking the Run or Debug toolbar buttons.<topic_end>
<topic_start>
Launch DevTools from the toolbar/menu
Once an app is running,
you can start DevTools using one of the following:<topic_end>
<topic_start>
Launch DevTools from an action
You can also open DevTools from an IntelliJ action.
Open the Find Action… dialog
(on macOS, press Cmd + Shift + A),
and search for the Open DevTools action.
When you select that action,
DevTools is installed (if it isn’t already), the DevTools server
launches, and a browser instance opens pointing to the DevTools app.When opened with an IntelliJ action, DevTools is not connected
to a Flutter app. You’ll need to provide a service protocol port
for a currently running app. You can do this using the inline
Connect to a running app dialog.
<topic_end>
<topic_start>Install and run DevTools from VS Code
<topic_end>
<topic_start>
Install the VS Code extensions
To use the DevTools from VS Code, you need the Dart extension.
If you’re debugging Flutter applications, you should also install
the Flutter extension.<topic_end>
<topic_start>
Start an application to debug
Start a debug session for your application by opening the root