FAQ's

I want to extract files in Windows.

Solution:

• Unzip the file.

• Right click on the extracted file and select `View files`.

How do I customise the app?

I need to customise certain widgets used in the app. How can I do it?

Solution:

The whole app is made modular , so customizing the widgets used in the app will be a cakewalk. Every reusable widget used in the app are separated into different dart files under the /widgets directory. Each of these widgets take the required parameters and a list of data items. These widgets can be modified to app requirements and is completely modular in structure.

I need to use custom colors and also use certain primary colors and themes across my whole app.

Solution:

Under the /lib/constants directory exists a app_color.dart file that specifies the primary, accent, primary dart color.

ThemeData has several parameters which can be used to specify style properties to be used across the app.

How do I decide which widget must be Stateful and which one must be Stateless?

Solution:

1. Figure out which widgets must be Stateful and Stateless

Widgets in Flutter can be Stateful or Stateless, depending on whether they depend on some state. If a widget changes—the user interacts with it, it’s Stateful; otherwise it can be Stateless. Stateful widgets are useful when the part of the user interface you are describing can change dynamically.

2. If using Stateful widget, decide which object manages the widget’s state.

There are three main ways to manage state:

  • The widget manages its own state.

  • The parent manages the widget’s state.

  • A mix-and-match approach

How do you decide which approach to use? The following principles should help you decide:

  • If the state in question is user data, for example the checked or unchecked mode of a checkbox, or the position of a slider, then the state is best managed by the parent widget.

  • If the state in question is aesthetic, for example an animation, then the widget itself best manages the state.

  • When in doubt, let the parent widget manage the child widget’s state.

3. Subclass StatefulWidget and State.

The MyStatefulWidget class manages its own state, so it overrides createState() to create the State object. The framework calls createState() when it wants to build the widget. In this example, createState() creates an instance of _MyStatefulWidgetState, which is implemented in the next step.

class MyStatefulWidget extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title;​ @override _MyStatefulWidgetState createState() => new _MyStatefulWidgetState();}​class _MyStatefulWidgetState extends State<MyStatefulWidget> {​ @override Widget build(BuildContext context) { ... }}

4. Plug the stateful widget into the widget tree.

Add your custom stateful widget to the widget tree in the app’s build method.

// This widget is the root of your application. @override Widget build(BuildContext context) { return new MaterialApp( title: 'Flutter Demo', theme: new ThemeData( primarySwatch: Colors.blue, ), home: new MyStatefulWidget(title: 'State Change Demo'), ); }}

None of the above, I have a different query?

The above listed FAQs were not of your help? Facing some other issues?

Solution:

We provide our customers with lively support and welcome all your issues. We request you to provide a short description of the visible symptoms of the error that you are facing. If applicable, include error messages, screen shots, and stack traces. If applicable, submit a step-by-step walkthrough of how to reproduce the issue.