Android Studio报错：String/button重复定义，寻求解决方案

Hey there, let's get this duplicate string resource error sorted out—it's a pretty common hiccup when working with Android resources, so we'll have you back on track quickly.

What's causing this error? #

This message pops up because you've duplicated the button string resource in your project's resource files. Android strictly enforces unique resource IDs, so having two <string name="button"> entries (either in the same strings.xml file or across different localization/value folders) will trigger this error.

Step-by-step fixes: #

1. Locate the duplicate entries

   • Switch to the Project view in Android Studio (instead of the default Android view) to see all your resource folders clearly.
   • Expand res/values and check every strings.xml file here—including localized versions like values-fr/strings.xml or values-de/strings.xml if you have them.
   • For a faster search, use the global search shortcut: Ctrl+Shift+F (Windows/Linux) or Cmd+Shift+F (Mac). Search for <string name="button"> to find all instances of this resource.

2. Remove or merge the duplicates

   • If you accidentally added the same button string twice in the same file, just delete one of the entries. For example, delete the redundant line below:

     <!-- Keep this one -->
     <string name="button">Submit</string>
     <!-- Delete this duplicate -->
     <string name="button">Send</string>
     

   • If you have the same button resource in multiple language-specific strings.xml files, that's totally normal (it's how localization works!). The problem only occurs when the same file has duplicate entries.

3. Clean and rebuild your project

   • After fixing the duplicates, head to the top menu bar: Build > Clean Project, then Build > Rebuild Project. This clears any cached resource data and ensures your changes are applied properly.

Extra check for multi-module projects #

If your app has multiple modules, don't forget to check each module's res/values/strings.xml files too—duplicate resource IDs across modules can also trigger this error.

内容的提问来源于stack exchange，提问作者Muhammad Ashraf