How to Fix Duplicate Resource Errors in Android Settings Activity

Описание: Solve the `duplicate value for resource 'attr/defaultValue'` error in your Android app settings activity with this simple guide.
---
This video is based on the question https://stackoverflow.com/q/63142879/ asked by the user 'Michiel' ( https://stackoverflow.com/u/12327503/ ) and on the answer https://stackoverflow.com/a/63151389/ provided by the user 'Michiel' ( https://stackoverflow.com/u/12327503/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Android preference defautvalue duplicate resource

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Fixing the Duplicate Resource Error in Android Settings Activity

Creating a settings activity for your Android application can sometimes lead to frustrating errors. One common issue developers encounter is the duplicate value for resource 'attr/defaultValue' error. This error typically arises when there are multiple definitions of the same resource attribute, causing a conflict during the build process.

Understanding the Problem

You may find yourself in a situation like this:

You’ve started creating a settings activity for your Android app using androidx.preference.PreferenceFragmentCompat, only to be halted by the following error message:

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

This message indicates that there are two or more declarations of the defaultValue resource in your project.

Why Does This Error Happen?

Resource Duplication: The error occurs because you have defined the same resource attribute (in this case, defaultValue) multiple times.

Dependencies: When you include certain libraries, they might come with their own definitions of resources. If these overlap with your existing resource definitions, you will encounter such conflicts.

Solution: Removing the Duplicate Resource Definition

The solution to your problem is straightforward: identify and remove the duplicate definition of defaultValue. Here’s a step-by-step guide on how to do this:

Step 1: Locate the Problematic Resource

Check Your Custom Resources: Navigate to your res/attr/ folder in your Android project.

Identify the Duplicate Attribute: Look through the XML files in that directory and find where defaultValue is defined.

Step 2: Remove the Conflicting Definition

If you find a definition for defaultValue that you created earlier, simply delete that line. Most likely, the library you are using (in this case, android.preference:preference:1.1.1) already defines this attribute.

Step 3: Clean and Rebuild the Project

Clean Your Project: In Android Studio, navigate to Build > Clean Project.

Rebuild: Then, select Build > Rebuild Project. This helps ensure that all caches are cleared and the project is rebuilt from scratch.

Verify the Fix

Once you have completed the steps above, launch your application again. The error should now be resolved, allowing you to continue building your settings activity without interruptions.

Conclusion

Managing and organizing resources in Android can sometimes be tricky, especially when dealing with multiple libraries. However, by understanding how resource conflicts work and knowing how to resolve them, you can save yourself significant time and frustration.

If you encounter the duplicate value for resource 'attr/defaultValue' error in the future, simply follow the steps outlined here, and your settings activity should run flawlessly!