Hmm, have you used any of the Java-based autocompletion systems? - IntellJ / Android Studio autocompletion system is context aware and will only list relevant methods (which means that the list is rather short and useful for the context). Which is a stark contrast to many ctags-like autocompletion systems, which will just dump all the symbols on you and aren't very useful in my experience.

Using autocompletion means you don't have to leave the editor window and I've found it hugely useful for methods which have several overrides - instead of leaving the editor, you just choose the one you need as you type.