MyFlutterSchool

Reference: Appbrewery

Adding assets

1. Create a directory under the project's topmost directory (Say 'images')
2. Mention the created directory in pubspec.yaml under the flutter: keyword

flutter:  
  uses-material-design: true  
  assets:
    - images/
#Each child has two spaces prefixed

3. Use in project with the AssetImage class

image: AssetImage('images/diamond.png'),

App Icon

1. Generate platform-wise icons in an AppIconGenerator
2. Replace mipmap folders under /android/app/../res/ with the generated ones

Instead you can also use the Create New Image asset option on res folder.

3. Replace Assets.xcassets under /ios/runner/ with the generated ones for ios devices.

Stateless

In order for hot reload to work, your app be returned from a class that extends stateless widget

• Type in stless and hit enter, a class which extends steless will automatically be created!
• Instead of returning a container, return, say a MaterialApp class

SafeArea

Wrap the SafeArea() widget around any widget, so that it doesn't overlap with system resources such as the topBar, navigationBar, notch area, etc.

Just Alt+Enter on any widget, select 'Wrap with widget' and rename widget to SafeArea

Declaring and not initializing a variable in Dart creates a dynamic variable i.e., it's data type can be changed at a later point of time.

Polymorphism in dart

class Car{
	int seats=5;
	void drive(){
		print('Start Engine');
	}
}
class Tesla extends Car{
@override //Uses the below function if it is overloaded 
//with a function from the parent class
void drive(){ //Overloading as drive() exists in car
	super.drive();//Calls() drive of parent. 'super' points 
	//to parent class
	print('Autopilot engaged');
	}
}

In the above snippet, when the drive function of a Tesla object is called, Engine is started (as inherited from Car) and Autopilot is engaged as it comes under drive() of Tesla. A Car object can not engage Autopilot