9. Conventions for the tutorials

9.1.  API version, package and application name

The tutorials of this document have been developed and tested with Android 4.0.4, API Level 15. Please use this version for all tutorials in this book. Higher versions of the API level should also work. A lower version of the Android API might also work, but if you face issues, try the recommended version.
The base package for the projects is always the same as the project name, e.g. if you are asked to create a project "de.vogella.android.example.test", then the corresponding package name is "de.vogella.android.example.test".
The application name, which must be entered on the Android project generation wizard, will not be predefined. Choose a name you like.

9.2.  Warning messages for Strings

The Android development tools show warnings, if you use hard-coded strings, for example in layout files. For real applications you should use String resource files. To simplify the creation of the examples, we use Strings directly. Please ignore the corresponding warnings.