A Widget can be defined as
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● A structural element
○ e.g. Button, TextView, Menu
● A design element
○ e.g. Font or Color
● A layout element
○ e.g. Margin or Padding
● Or even a business logic
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The app itself is a Widget
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The app itself is a Widget
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The app itself is a Widget
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“Stateless Widget
vs
Stateful Widget”
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Stateless Widget
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● Dumb Widget
● It doesn’t know anything
● Gets render only once or
● When the parent widget changes the
configuration
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Stateful Widget
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● Dynamic widget which has its own properties
● Those property is know as state of the widget
● The state of the widget can be changed by user
input, any operation or other widget’s state
change.
● setState() method is used to change the state.
● Each time widget gets rebuild when setState()
method gets called.
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Let’s see it in Action
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Speaker List App
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Speaker List App...
● Basic Requirement
○ AppBar
○ ListView
○ Text
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Speaker List App...
● Let’s Start
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Speaker List App...
● Add Scaffold with AppBar
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Speaker List App...
● Create Speakers Array
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Speaker List App...
● Create Listview with Speaker’s
Name
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Speaker List App...
● Wrap Text with ListTile Widget
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Speaker List App...
● Let’s add claps count in trailing
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Speaker List App...
● Let’s add border using Container &
BoxDecoration widget
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Speaker List App...
● Let’s make it circular border
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Speaker List App...
● We need to add some padding.
● For that we have Padding widget &
we will wrap our Container Widget
to Padding Widget
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Speaker List App :)
● Widgets we used
○ MaterialApp
○ Scaffold
○ AppBar
○ Text
○ ListView
○ ListTile
○ Padding
○ Container
○ BoxDecoration
○ Border
○ BorderRadius
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Futter benefits
● Easy to understand
● Less Time consuming
● Code Length: ~50 line of code
● And you get iOS app free
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Wait…
This is just
static data
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We need something
simple and as fast
as Flutter
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We have
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Firebase helps you to
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● “Build” Better Apps
● “Improve” app quality
● “Grow” your business