Import someone else's Android project, prompting/libs/gen already exists but was not a source folder. Convert to a source folder or rename it

Workaround:

Workaround for this problem:

1. Right click on Project and select "Properties"

2. Select "Java Build Path" on the Left

3. Open the "Source" tab panel

4. Click "Add Folder ..."

5. Tick the "Gen" folder, click OK, click Yes, then click OK

6. Finally right click on the project and select "Fix Project Properties" in "Andriod Tools"

This problem occurs because of an error in the CLASSPATH file, which exists at the root of the project and is automatically generated by Eclipse, which defines the $classpath that you use when compiling your project, and generally does not require manual configuration. If an error occurs, you can also modify it manually:

Import someone else's Android project, prompting/libs/gen already exists but was not a source folder. Convert to a source folder or rename it