Build file for World Wind Android. Compiles the World Wind Android source, builds the World Wind Android library, and creates the World Wind Android documentation. The default target is 'build'. Use 'ant -p' to view a list of targets. Android SDK path is not configured. The Android SDK path is not configured. Either set the ANDROID_HOME environment variable, or set the android.home.dir build property in WorldWindAndroid/build.properties. The value must be an absolute path to the Android SDK folder, and must not end with a trailing slash.