Summary: The class
android.support.v7.widget.GridLayout vanished from my Eclipse project! Here’s how I retrieved it.
I was working on an Android project in Eclipse a while back, when I got pulled off of it to do some contract work. When I finally returned to the project today, I was surprised to see it had this compiler error: “The import android.support.v7.widget cannot be resolved”.
Periodically I’m dumbfounded by things which happen in Eclipse, but I’ve begun to take surpises in a stride. I searched around the internet for posts which reported this problem and eventually found that the solution is to import a “support” library which is found in the Android SDK directory. For me, that jar file is located here:
This is a quick rundown of the simple procedure I followed to solve the problem:
- Open Eclipse’s Navigator view (from the menu up top, select Window > Show view > Navigator)
- Right-click on the project’s
- From the menu which opens, choose “Import…” and then choose “File System”.
- In the “File System” dialog which opens, navigate to wherever your android-support-v7-gridlayout.jar has been stored. Like I said above, for me it was under
C:\Program Files\Android\android-sdk\extras\android\support\v7\gridlayout\libs\android-support-v7-gridlayout.jarwhere presumably the Android SDK Manager placed it. Select the jar file, and click the Finish button.
- Tada! The compiler error goes away.
I don’t understand how this project broke while I wasn’t working on it. I can only imagine that the imported library was somehow deleted, but I don’t recall doing that, so it’s another one of those fun Android mysteries!
P.S. This evening, I discovered that I had added the jar file to a separate, Android library Eclipse project and had set that project as an Android reference for my current project (under Properties > Android). The library project had been closed some time between now and then. So that explains why the file was “missing;” it was never there to begin with!