Where should I put global methods and variables in an Android app? -

when i'm writing method or using member variable, find need share them across app. should go?

i can subclass activity, falls on use mapview , forced use mapactivity, not activities inherit subclass. there way around this?

where inheritance isn't applicable, tending put generic methods , member variables subclass of application object, i'm finding it's creating mess of code every class needs either grab access application object through via context, or have pass down.

i suspect better off creating myapplication.getinstance() , keeping in singleton, instead of passing application object down through app classes. before wanted see guys had say.

if want access "global singleton" outside of activity , don't want pass context through involved objects obtain singleton, can define, described, static attribute in application class, holds reference itself. initialize attribute in oncreate() method.

for example:

public class applicationcontroller extends application {     private static applicationcontroller _appctrl;      public static applicationcontroller getappctrl()     {          return _appctrl;     } } 

one example resources: because subclasses of application can obtain resources, access them when define static method, returns them, like:

public static resources getappresources() {     return _appctrl.getresources(); }