#Flutter - Guide to Solve different kinds of Problems (Page - 17)

Are you trying to set minimum height or width of Container() widget in a Flutter, then use ’constraints’ attribute and apply BoxConstraints() on it like below.

In this example, we are going to show you the way to open native contact or address book and pick single contact from the list. These kinds of features are required while making utility apps related to contacts, SMS, phone number dialer.

In this example, we are going to show you the best way to turn on fullscreen mode or exit from the fullscreen mode in Flutter App. Fullscreen mode can be used in different kinds of apps like games, IoT projects, or normal app as well.

In this example, we are going to show to easiest way to set child widget’s width equal to parent widget’s width. You may need this kind of design in your flutter app UI. See the example below and learn to set child widget’s width 100% matching to parent widget.

In this example, we are going to show the best way to listen to battery level, charging status, or any changes regarding battery information. For example, if you want to make an app that executes any code block automatically whenever the charger is connected to the device.

In this guide, we are going to show you the easiest way to get Battery Information such as battery level, charging status, battery health, plugged status, and many more in Android and iOS. See the example below for deeper insight.

In this example, we are going to show you the way to run Javascript (JS) in Flutter Web. It is a simple approach to demonstrate the use of JS or call of JS function on button click in Flutter Web.

Flutter Web is new and there are lots of difficulties while building simple functionality, the same way it is a bit difficult to grab URL attributes or parameters. Anyway, we will show you how to grab parameters from URLs in Flutter web.

In this guide, you are going to learn to open an external or any link in a new tab, same tab, and in the new window in Flutter Web. There are plenty of packages out there to perform this, but we are going to show to open links without any package.

Do you want to close your app automatically using code, or want to close the app when the user presses any button then read this guide to learn to exit your app programmatically.

Toast is the best way to show the message in Flutter because it gets dismissed automatically, doesn’t affect any other UI components, and looks app interactive. See the example below and learn to show the Toast message when a button is pressed or on any action.

Flutter is known for its beautiful user interface (UI) design, in this guide as well, we are going to show you the way to set linear gradient background on Container. The UI looks beautiful with gradient background.