File list (Check if you may need any files):
HelloWorldActivity\AndroidManifest.xml
..................\res\layout\hello_activity.xml
..................\...\values\strings.xml
..................\src\com\example\android\helloactivity\HelloActivity.java
..................\tests\AndroidManifest.xml
..................\.....\src\com\example\android\helloactivity\HelloActivityTest.java
..................\.....\...\...\.......\.......\helloactivity
..................\src\com\example\android\helloactivity
..................\tests\src\com\example\android
..................\src\com\example\android
..................\tests\src\com\example
..................\src\com\example
..................\tests\src\com
..................\res\layout
..................\...\values
..................\src\com
..................\tests\src
..................\res
..................\src
..................\tests
HelloWorldActivity