android - Clearing activity stack when you have multiple entry point activities? -


i have app has multiple entry point activities. want able clear activity stack programmatically. imagine app requires user authentication, , user wants invalidate session remotely (stolen device, example).

in case app has single starting activity, use:

intent intent = new intent(context, loginactivity.class); intent.addflags(intent.flag_activity_clear_top); startactivity(intent);

to root activity. app may have been launched different entry points, , there might different activity classes @ root of stack.

some options:

  1. register broadcast receiver in base activity class can call anywhere. in handler, call finish(), unwinding whatever stack may exist.
  2. use frowned-upon system.exit().
  3. in above example, use intent.flag_activity_clear_task in addition other 2 flags (but available in api 11 , above...)

thanks

you can check name of activity @ root of task stack , start activity flag_activity_clear_top. if root activity not activity want start activity want in oncreate , call finish().
can find name of root activity

  1. call gettaskid () task id.
  2. obtain activitymanager object , call getrunningtasks list of running tasks (check out warning in doc, not understand clearly)
  3. when task in list match id above can activity in root using field baseactivity

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