Getting "package android.support.multidex does not exist" after upgrading to Android Studio 2.3

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07-10-2024

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Android Studio 2.3 Upgrade Headache: "package android.support.multidex does not exist"

Have you recently upgraded to Android Studio 2.3 and now face the dreaded "package android.support.multidex does not exist" error? You're not alone! This error often arises when projects rely on the android.support.multidex library, which is crucial for apps exceeding the 64K method limit. Android Studio 2.3 introduced significant changes in its build system, potentially causing conflicts with existing projects. Let's break down the problem and provide solutions to get your app back on track.

Understanding the Issue

The android.support.multidex library is a lifesaver for apps that utilize numerous classes, pushing them over the 64K method limit imposed by Android's Dalvik Virtual Machine (DVM). It allows Android to load multiple DEX files, effectively expanding the app's code space.

Scenario:

Imagine you're working on a large Android app with a complex feature set. Your app has grown beyond the 64K method limit, requiring you to implement multidex support using the android.support.multidex library. You've successfully integrated it, and your app runs smoothly.

The Upgrade:

Excited about the new features in Android Studio 2.3, you upgrade. However, when you build your project, the compiler throws the "package android.support.multidex does not exist" error. This error indicates that the build system can't find the necessary multidex library files, leading to compilation failure.

Why It Happens:

Android Studio 2.3 introduced a new build system based on Gradle 3.0, which significantly changed how projects are managed. The old multidex implementation might not seamlessly transition to the new build system, causing the library to become inaccessible.

Solution:

1. Update Multidex Dependency:

   • Open your project's build.gradle (Module: app) file.

   • Verify that the android.support.multidex dependency is correctly declared in the dependencies section:

     dependencies {
         implementation 'com.android.support:multidex:1.0.3' // Update version if needed
         // ... other dependencies
     }
     

   • If the dependency is outdated, update it to the latest compatible version from the Android Support Repository.

2. Enable Multidex in Application Class:

   • Open your Application class (e.g., MyApplication.java).

   • Add the following code to its onCreate() method:

     @Override
     public void onCreate() {
         super.onCreate();
         MultiDex.install(this); 
     }
     

3. Clean and Rebuild Project:

   • Go to Build > Clean Project.
   • Then, go to Build > Rebuild Project.

Additional Tips:

• Check Compatibility: Ensure that all your dependencies (libraries and plugins) are compatible with Android Studio 2.3 and the latest Gradle version.
• Invalidate Caches/Restart: Sometimes, simply invalidating caches and restarting Android Studio can resolve issues. Go to File > Invalidate Caches / Restart... and choose "Invalidate and Restart".
• Google Search: If you're still stuck, search online forums and websites like Stack Overflow for specific error messages or scenarios similar to yours.

Conclusion:

Upgrading to Android Studio 2.3 can sometimes cause unforeseen issues. By understanding the underlying problem with the android.support.multidex library and following the steps outlined above, you can effectively troubleshoot the "package android.support.multidex does not exist" error and get your project building again. Remember, staying up-to-date with Android development best practices and actively seeking solutions when encountering problems is crucial for smooth app development.

References:

• Android Support Repository:
• Multidex Support Library:
• Stack Overflow (Multidex Issues):