Hello world app in Flutter
How to use a widget as the root of the application, inflate it and put it on the screen at startup?
runApp(Widget app) function, which should be called in the main function.
Button widget appearing as an icon
IconButton
Input field widgets
TextField
CheckBox
Switch
Line buttons in a row with this widget
ButtonBar
Create a button with standard material design
RaisedButton
Create a button without a frame
FlatButton
Button with less emphasized frame
OutlineButton
Add an image with this widget from various sources
Image
You can add from various sources with named constructors