Fixing the Gradle Task AssembleDebug Failed Error in Flutter

Описание: Learn how to resolve the `java.nio.file.NoSuchFileException` error in your Flutter project by enabling multidex in your Gradle file.
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This video is based on the question https://stackoverflow.com/q/65643211/ asked by the user 'Jaydip Pawar' ( https://stackoverflow.com/u/13359721/ ) and on the answer https://stackoverflow.com/a/65643362/ provided by the user 'Shubham Narkhede' ( https://stackoverflow.com/u/12096653/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Fixing the Gradle Task AssembleDebug Failed Error in Flutter

If you're working with Flutter and recently ran the command flutter clean, you might have encountered a frustrating error: Execution failed for task ':app:mergeDexDebug'. This issue often stems from a problem with your Gradle build process, specifically related to multidex handling. In this guide, we will walk you through understanding the cause of this error and how to effectively resolve it.

Understanding the Issue

After executing the flutter clean command, you received the following error message:

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This line includes the required library for enabling multidex support in your app.

Step 3: Enable Multidex

Next, you’ll want to ensure that multidex is enabled. Within the android block, add or modify the defaultConfig section to include:

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This tells the build system to allow the use of multiple DEX files.

Step 4: Save and Sync

After making these changes, save the build.gradle file and sync your project with Gradle. This can usually be done through the toolbar within Android Studio or by running a Gradle sync command in your terminal.

Step 5: Rebuild Your Project

Once the sync is complete, attempt to run your Flutter project again. You can do this by executing the command:

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This will initiate the build process and, if everything is set correctly, the issue should now be resolved.

Conclusion

Encountering the Gradle task assembleDebug failed error can be frustrating, especially after using flutter clean. By enabling multidex support in your project, you can overcome limitations associated with method counts and ensure a smoother development experience. Following the steps outlined above will help you tackle this common issue and get back to building awesome Flutter applications. If you continue to experience problems, don't hesitate to consult the official Flutter and Android documentation for further assistance.