Whenever we start designing a login and sign-up form of any application. We always need an input field to take input from end users that are a primary way for them.
In Flutter, we have a TextField widget to take input from the end users. A text field lets the user enter text, either with a hardware keyboard or with an on-screen keyboard. It is defined as a stateful widget in the framework. It's having many important properties that can be set to customize the behavior.
When I was started working with Flutter framework. I found lots of third-party plugins to create application screen. The google map plugin was one of them that is still under construction. By using this plugin, we have written the following post.
Flutter - Google map plugin.
Flutter - How can draw route on google map between markers.
If you have read and worked on them. You will see, it has some limitations to work on UI design of google map.
Flutter team has rolled out their own google map widget. This is a widget that is very helpful to design inline google map screen in the application. We can perform all the actions that we do with a normal widget. This plugin is also under construction and they breaking the changes in this widget.
In Flutter, we have a TextField widget to take input from the end users. A text field lets the user enter text, either with a hardware keyboard or with an on-screen keyboard. It is defined as a stateful widget in the framework. It's having many important properties that can be set to customize the behavior. 
