Flutter target of uri doesn’t exist

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In the Flutter framework, the target refers to the specific platform or device for which you want to build your application. When you encounter the error “target of URI doesn’t exist”, it usually means that you are trying to import a package or file that cannot be found for the specified target.

The most common cause of this error is when you have different imports or dependencies specified in your Flutter project files, such as the pubspec.yaml or main.dart, than what is available for the target platform.

To resolve this error, you can follow these steps:

  1. Check your pubspec.yaml file for any dependencies or packages that may be causing the error. Ensure that the package is compatible with the target platform.
  2. Run the command flutter packages get in your project directory to fetch and update any missing dependencies.
  3. If you are using platform-specific code, ensure that you have separate imports or conditional statements to handle different targets. For example, if you have separate code blocks for Android and iOS, you may need to wrap them in conditionals such as if (Platform.isAndroid) { ... } or if (Platform.isIOS) { ... }.
  4. Verify that the necessary SDKs or tools are installed and configured properly for the target platform you are trying to build for. For example, if you are targeting iOS and encounter this error, make sure you have Xcode and the necessary iOS SDK installed.

Here is an example of what a code snippet with platform-specific imports might look like:

    
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter App',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: TargetHomePage(),
    );
  }
}

class TargetHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Target Home Page'),
      ),
      body: Container(
        child: Center(
          child: Text(
            kIsWeb ? 'Web Target' : 'Mobile Target',
            style: TextStyle(fontSize: 24),
          ),
        ),
      ),
    );
  }
}

In the above example, the code checks the target platform using kIsWeb from the flutter/foundation.dart package, and conditionally renders different text based on the result. This approach ensures the correct content is displayed based on the target platform.

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