Скачать или смотреть Flutter: How to Search for a Mobile Number in a List of Sim Cards

Learn how to implement a mobile number search feature in Flutter using the `mobile_number` plugin. This guide provides clear code examples to enhance your app's functionality.
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This video is based on the question https://stackoverflow.com/q/64548013/ asked by the user 'Roxx' ( https://stackoverflow.com/u/2301394/ ) and on the answer https://stackoverflow.com/a/64548457/ provided by the user 'Ammar Hussein' ( https://stackoverflow.com/u/5565834/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

When developing mobile applications using Flutter, you may encounter situations where you need to retrieve and search through a list of data. A common scenario is fetching Sim Card information, such as mobile numbers, using the mobile_number plugin. In this guide, we'll walk through a simple implementation that allows you to search for a specific mobile number within a list of Sim Cards.

Fetching Mobile Numbers

Before we dive into the search functionality, let's briefly revisit how to retrieve mobile numbers using the mobile_number plugin. Here’s a quick recap of the code to fetch the mobile number and Sim Card details:

[[See Video to Reveal this Text or Code Snippet]]

This code initializes the mobile number state and retrieves data from the user's device. To display the information, we use the following method:

[[See Video to Reveal this Text or Code Snippet]]

With that in mind, let’s explore how to search for mobile numbers.

Searching Mobile Numbers in the List

To search for a specific mobile number or part of a number in the _simCard list, you can use the following code snippet:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Search Code

Functionality: The searchNumber function checks whether any Sim Card number in the _simCard list contains the specified number.

Using where:

The where method filters the list based on a specific condition. In this case, it checks if the element.number contains the number we are searching for.

It returns an iterable collection of matching items.

Checking for Results:

isNotEmpty is used to determine if the filtered list has any elements. If it does, the function returns true, indicating that the number exists in the list.

Exact Match Option

If you want to search for an exact match, you can modify the searchNumber function like this:

[[See Video to Reveal this Text or Code Snippet]]

Here, element.number == number checks for an exact match of the mobile number.

Conclusion

Searching through lists in Flutter can be straightforward once you understand how to leverage the capabilities of Dart’s list manipulation features. By implementing a simple search function, you can enhance the user experience of your application, allowing users to efficiently find and verify Sim Card details.

By using the above methods, you can quickly adapt your Flutter application to work with mobile numbers and provide a robust search feature. Happy coding!