Скачать или смотреть How to Fix Your Android App Crashing on Launch

Discover effective solutions for resolving application crashes on launch in Android development. Learn to update dependencies and troubleshoot issues with Hilt dependency injection.
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How to Fix Your Android App Crashing on Launch: A Step-by-Step Guide

If you've developed an Android application, you may have encountered a frustrating issue: your app crashes upon launch. This problem can stem from various reasons, such as updates to your Gradle plugin, incorrect configurations, or dependency issues. In this guide, we'll explore a real scenario and break down actionable steps to resolve the crashing issue effectively.

Understanding the Problem

The user reports that their Android app crashes immediately upon startup, displaying the following error in the log:

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This indicates a failure to instantiate the application class, often due to incorrect setup in the build configuration, especially when dealing with dependency injection frameworks like Hilt.

Solution Steps

To fix the crashing issue, the following steps should be taken:

1. Update Your Gradle Files

Upgrade Gradle Plugin: Ensure you’re using the correct version of the Gradle plugin. For example, updating from 4.x.x to 7.0.4 is recommended.

Update Kotlin Version: Use Kotlin version 1.6.0 to ensure compatibility with newer features and other libraries.

Here’s how to properly set it up in your project-level build.gradle:

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2. Migrate from Dagger to Hilt

Hilt simplifies Dagger's setup with fewer configurations. Ensure your application is annotated correctly:

In your application class:

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3. Fix the Annotation Processor Setup

One common mistake is using annotationProcessor instead of kapt with Kotlin projects. In your module-level build.gradle, make sure you're using kapt for Hilt:

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4. Adjust Your AndroidManifest.xml

Your AndroidManifest.xml should correctly reference your application class:

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5. Clean and Rebuild the Project

After making changes, don’t forget to clean your project and rebuild it. This ensures that all configurations and new dependencies are correctly applied.

In Android Studio, go to Build > Clean Project and then Build > Rebuild Project.

You may also want to Invalidate Caches / Restart.

6. Verify Multidex Configuration

If you are exceeding the method limit with your dependencies, ensure MultiDex is correctly configured in your build.gradle:

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Add the dependency for Multidex:

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Conclusion

By carefully following these steps and ensuring that your Gradle files and application class are set up correctly, you can overcome the crashing issue upon app launch. If your app continues to crash even after applying these solutions, consider checking your logcat for any other errors that may indicate further issues.

With a clearer path to resolving this common problem, you can focus on developing more features for your app without the headache of crashes. Happy coding!