* Don't pollute memory by endlessly saving results of all previous
  searches: redo them if necessary.

* Resist screen configuration changes by implementing
  onRetainNonConfigurationInstance() and
  getLastNonConfigurationInstance().  (This is tied to the previous
  item: properly store searches rather than storing the adapters
  holding their results.)

* Display information of character block and general category.

* Provide a way to access (or search) a character directly by number.

* Do something about Chinese ideographs.

* Provide a way to repopulate database if desired.

* Implement a list of "favorite" Unicode characters?

* Comment the code!...