android - Find out whether the current activity will be task root eventually, after pending finishing activities have disappeared -

if firstactivity root of task, , finishes , launches secondactivity, calling istaskroot() in secondactivity return false, because firstactivity's finishing happens asynchronously , isn't done yet. waiting second , then calling istaskroot() returns true.

public class firstactivity extends activity {     @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         finish();         startactivity(new intent(this, secondactivity.class));     } } 

public class secondactivity extends activity {     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.main);     }      @override     protected void onresume() {         super.onresume();         ((textview)findviewbyid(r.id.tv1))                 .settext("istaskroot() in onresume(): " + istaskroot());         new handler().postdelayed(new runnable() {             @override             public void run() {                 ((textview)findviewbyid(r.id.tv2))                         .settext("istaskroot() after 1s: " + istaskroot());             }         }, 1000);     } } 

is there way …

• (optimally) find out whether activity task root eventually, or,

• (better nothing) sort of notification/callback once task in "final" state , istaskroot() return "truth"?

i've had similar problem , wanted tight control on root activity is. in case, root 1 of own activities (not 3rd party ones), able use following approach:

i extended application class, added weak reference activity called currentrootactivity , added synchronized getter , setter.

then managed state myself when activities created / destroyed. use case little special because looking replace 1 root another, knew reset new state variable, i'm pretty sure can same.

i able add state logic in shared base class of activities. wasn't disgusting sounds :)

as mentioned in comments, activity method isfinishing might come in handy.