Flutter

Installation

Downloading

Search web for "Flutter" and click on Install link
Choose Windows
Scroll to "Get the Flutter SDK" and download flutter zip file form (the link is filtered in some counhteries)
Extract The zip into a folder like c:\SDKs

Set Path in Environment variable

click windows logo (start) and type environment , select "Edit System Environment variable" form the menu
Click Environment variable button in the opened dialog
then in system variables list select "Path" and click edit
Click "New" in the opened dialog, and browse for the bin folder of flutter path : c:\SDKs\Flutter\bin and ok
Then repeat the same process for "path" in "User variables" list

Testing installation

In Cmd , type "flutter doctor" ,It should give the information about flutter installation and what is missing

. Flutter codes can be run and tesed rapidly in the browser without need to install Android SDK tool chain or Android Studio

Creating a flutter project

Creating a flutter project using VSCode

1.Install Flutter ( by DartCode) Extention in vscode 2. To open command palette in VSCode: Ctrl+shift+p or Menu>View> command palette 3. Type flutter and choose new project 4. select a project type,select a Path and give a name for the project and accept to trust the created folder 5. it will generate the project 6. In the right hand of vscode`s status bar(footer),Choose chrome instead of Windows 7. Press F5 to run the project 8. it will download needed files in first run and then runs the project.

Running dart file without a prject

close any folder and create a new file name something.dart
copy following dart code in it and save:

    void main(){
       // this will print "hi"
           print("hi!");

       // variables:
           int    i= 5, j=null;
           double d= 3.14;
           string s= "what`s up?";
           var    t= 12.5;

       // using a variable inside a string:
           print("The number is $i"+d.toString());

       // "if" , "switch" ,"for",continue,break, functions,arrow functions, syntax is like c or c# language

       //class defenition:
        Class User{
            String name;
            String number;
            User   (this.name,this.number); // constructor
        }

        // class usage:
        User user1=User("Dvid","baker");
        print(user1.name);

4.press f5 to run it and see the result in the debug console

Creating flutter Project by command line

Type this in cmd

flutter create projectName
 cd projectName
 flutter analyze
 flutter test
 flutter run lib/main.dart

pub

pub is the package manager for dart
add dependency to your project using pubspec.yaml file :

...
dependencies:
    path: ^1.7.0

    dev_dependencies:
    ..pedantic:^1.9.0

dev_dependencies will not includeed in your app compilation

pub commands:

flutter pub get
flutter pub outdated
flutter pub upgrade	
flutter pub add http

nhab / Flutter