e.person.forEach((p) { if (p != null) { String x = p.name.toLowerCase().toString(); String y = p.age.toString(); String z = '${x}_$y'; _list.add(z); e.newList = _list; } }); } }); data.forEach((e) => print(e.newList)); } List<Data> dataFromJson(String...
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...
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 Thelengthproperty always return...
import'package:flutter/material.dart';voidmain(){runApp(constMyApp());}classMyAppextendsStatelessWidget{constMyApp({Key?key}):super(key:key);@overrideWidgetbuild(BuildContextcontext){returnconstMaterialApp(title:'Flutter Demo',home:HomePage());}}classHomePageextendsStatelessWidget{constHomePage({Key?k...
The Syncfusion Flutter PDF Library now allows users to encrypt and decrypt PDF documents in Flutter applications. PDF encryption allows users to protect their PDF documents from unauthorized access. These days, data theft has become a real problem. So, we need to secure important files before ...
Step 4: Double-click the ‘flutter’ folder now. Double-click the ‘flutter_console.bat’ file to launch a command prompt window. The CMD will look as shown below: [ Related Blog:How to Install TensorFlow on Windows] Step 5: Type ‘flutter’ in the CMD to see a list of all available...
Now it’s time for iOS. Luckily, we only need to change one file in this case. Add the following values (note thatCFBundleURLTypesitem may already exist in the list; in that case, you need to add these items to the existing array instead of declaring it again) to$(FLUTTER_PROJECT)...
The final step to setting up your admin app is to pick a domain name you’d like to use to access the panel. For this guide, a good example would be;flutter-backend.admin.back4app.com. You can now log in to your admin dashboard by opening the provided domain on a browser. ...
Then, use your code editor to create apost_model.dartfile in thelibdirectory. Here, you will develop a newPostclass: lib/post_model.dart import 'package:flutter/foundation.dart'; class Post { final int userId; final int id; final String title; ...
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...