[Android] String

1. Docs
   
   • Format String
     http://developer.android.com/reference/java/util/Formatter.html
     
   • Define String Resources
     http://developer.android.com/guide/topics/resources/string-resource.html
   • xxx
     
2. Classes
   
   • Formatter
     
     • Define flags in formats argument
     • Define specifiers in formats argument
       
   • xxx
     
3. xxx