we will receive the task id as a parameter, which can be used to process the task. This is very important in situations such as calling an api to save data to a database or display a local notification.
This article mainly introduces how to use MQTT in the Flutter project to implement the connection between the client and MQTT broker, subscribe, unsubscribe, send and receive messages, and other functions. Learn more: How to use MQTT on Android. Project Preparation Create a project Create a new...
Flutter pushes declarative UI to its limit in this case. Enable and disable the state of a button resulting from the present of onPressed callback.If the onPressed callback is null, Flutter treat the button as no action hence showing the button in a disabled state.If the onPressed is there...
Well, in the context of Flutter, until now the application can only handle the background events using the platform code. Any plugins had no way to allow users to make a callback for handling the background events in Dart. That is the reason why Flutter users need to create platform-sp...
When you visit a post detail page, you will see aDeleteicon button in the AppBar. Pressing on the button will print a message in the console: Output flutter: DELETED This will represent a delete request. Due to the limitations of JSON Placeholder and this example application, the post will...
From thepreviouspost, I have shared how to setup your web server to implement RESTful api using Aqueduct with Postgresql. In this post, we are going to start building our flutter app to interact with our web application. How to set up Flutter project ...
If you are using Flutter, you do not need to care about this object (outside of testing), as it is implicitly created for you byProviderScope. The exception to this rule is if we need to create an object that takes aRefargument inside themain()method. In this case, creating aProvider...
#How do you convert String to Future of String in flutter? This example parsesFuture<String>intoStringvalues. The string variable is created and assigned with the string literal. Next, theFutureclass has aFuture.value()method that creates a future value. Here is an example ...
voidmain() {varnumbers=List.empty();print(numbers.isNotEmpty);//falseif(numbers.isNotEmpty)print("list is empty");else{print("list is not empty");}} Output: falsethe list is not empty #How to Check an empty list using the length property in the flutter ...
$ flutter pub get Step #4: Import the package Import the PDF package into the main.dart file, as shown in the following code example. import 'package:syncfusion_flutter_pdf/pdf.dart'; Step #5: Encrypt PDF file Add a Button widget as a child to the container widget. @override Widget...