There are many version/source control solutions for Eclipse. Microsoft Team Foundation Server 2010 (TFS) provides developers with the Microsoft Visual Studio Team Explorer Everywhere 2010 with SP1 as an Eclipse plug-in.
When you create a new Android application project, it is the first step that you select an API level as the project build target. You may afterwards change, for example, the API from Android 4.2 (level 17) to Google APIs 4.2 (level 17). You won’t make it because the project files are read-only if the Android project is under the control of TFS.
Check these two files out for edit before you change the API level or Android platform of an Android application project under source control: