Binding and unbinding Android Service to/from Fragment (in ViewPager) -

i got 1 single main-activity in create dynamically pages inside viewpager (via fragmentpageradapter). far good.

now got service-implementation want activity/those fragments bind to. , point ask myself best practice.

1. binding activity , communicate fragment service via callback through activity? (binding/unbinding in oncreate()/ondestroy())
2. binding each fragment on creation , unbind when destroyed? (same above)

both implementations seem work. second 1 offers straighter communication service.

when testing second fragments bound service on creation. when remove 1 doesn't seem destroyed. when start create fragments point (only 1 fragment after deleting others) again, binding service takes place when create more fragments created before.

perhaps again better overview.

• create activity 1 fragment in pager: service connected fragment
• create 2 more fragments in pager: service conntected on each creation
• removing 1 fragment: unbinding seems not called
• create 2 more fragments again: service seems not connected
• create fragment: service conntected on creation

is behaviour 1 can expect? implementation should choose; straighter communication on callback-communication?

thanks input in advance!

i prefer first method if use local service because have handle service.

assume activity has reference local service called "mylocalservice" (checkout local service example). within fragment can call like: getactivity().getmylocalservice(). thing fragment doesn't have deal lifecycle of service. hope helps.