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at the edited code since the last compilation.
the following libraries are recompiled:
the source code from those libraries is compiled into
kernel files and sent to the mobile device’s dart VM.
the dart VM re-loads all libraries from the new kernel file.
so far no code is re-executed.
the hot reload mechanism then causes the flutter framework
to trigger a rebuild/re-layout/repaint of all existing
widgets and render objects.
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FAQ
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<topic_start>
introduction
this page collects some common questions asked about
flutter. you might also check out the following
specialized FAQs:
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<topic_start>
what is flutter?
flutter is google’s portable UI toolkit for crafting beautiful,
natively compiled applications for mobile, web,
and desktop from a single codebase.
flutter works with existing code,
is used by developers and organizations around
the world, and is free and open source.
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<topic_start>
who is flutter for?
for users, flutter makes beautiful apps come to life.
for developers, flutter lowers the bar to entry for building apps.
it speeds app development and reduces the cost and complexity
of app production across platforms.
for designers, flutter provides a canvas for
high-end user experiences. fast company described
flutter as one of the top design ideas of the decade for
its ability to turn concepts into production code
without the compromises imposed by typical frameworks.
it also acts as a productive prototyping tool
with drag-and-drop tools like FlutterFlow
and web-based IDEs like zapp!.
for engineering managers and businesses,
flutter allows the unification of app
developers into a single mobile, web,
and desktop app team, building branded
apps for multiple platforms out of a single codebase.
flutter speeds feature development and synchronizes
release schedules across the entire customer base.
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how much development experience do i need to use flutter?
flutter is approachable to programmers familiar with
object-oriented concepts (classes, methods, variables,
etc) and imperative programming concepts (loops,
conditionals, etc).
we have seen people with very little programming
experience learn and use flutter for prototyping
and app development.
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what kinds of apps can i build with flutter?
flutter is designed to support mobile apps that run
on both android and iOS, as well as interactive apps
that you want to run on your web pages or on the desktop.
apps that need to deliver highly branded designs
are particularly well suited for flutter.
however, you can also create pixel-perfect experiences
that match the android and iOS design languages with flutter.
flutter’s package ecosystem supports a wide
variety of hardware (such as camera, GPS, network,
and storage) and services (such as payments, cloud
storage, authentication, and ads).
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who makes flutter?
flutter is an open source project,
with contributions from google and other
companies and individuals.
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who uses flutter?
developers inside and outside of google use
flutter to build beautiful natively-compiled
apps for iOS and android. to learn about some
of these apps, visit the showcase.
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what makes flutter unique?
flutter is different than most other options
for building mobile apps because it doesn’t rely
on web browser technology nor the set of widgets
that ship with each device. instead, flutter uses
its own high-performance rendering engine to draw widgets.
in addition, flutter is different because it only
has a thin layer of C/C++ code. flutter implements
most of its system (compositing, gestures, animation,
framework, widgets, etc) in dart (a modern,
concise, object-oriented language) that developers
can easily approach read, change, replace, or remove.