Cloning Instructions

Things needed:

• JDK (tested with openjdk)
• Eclipse (tested with Luna) OR Android Studio: Instructions to import using Android Studio
• Android SDK
• Eclipse Android Plugin
• Android SDK Packages for the target Android SDK Version. Instructions to import using Android Studio

Installing required Android SDK Packages

Open the Android SDK Manager:
Install the Android API, at the time of writing: Android 5.0(API 21).
Check Android API Level in AndroidManifest.xml, loook for:
<uses-sdk android:minSdkVersion="X" android:targetSdkVersion="Y" />
The targetSdkVersion will be used in the build process. That's the one you need to have.
Make sure to select the whole folder of the API Level Required.

If problems presist do a clean of all projects:

Project->Clean...->Clean All Projects->OK