android - In-app billing query inventory in AsyncTask? -

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i followed this tutorial add loading screen launch of app while data loaded asynctask's doinbackground() function.

my app features in-app billing premium upgrade , query inventory check on launch. iabhelper functions asynchronous.

how can integrate iabhelper checks doinbackground() main activity loaded when has completed?

my billing code follows:

private void checkforpremiumpurchase() {     billinghelper = new iabhelper(this, constants.base_64_key);     //start setup. asynchronous , specified listener called once setup completes.     billinghelper.startsetup(new iabhelper.oniabsetupfinishedlistener() {         public void oniabsetupfinished(iabresult result) {             if(result.issuccess()) {                 billinghelper.queryinventoryasync(mgotinventorylistener);             }         }     }); }  //listener that's called when finish querying items , subscriptions own iabhelper.queryinventoryfinishedlistener mgotinventorylistener = new iabhelper.queryinventoryfinishedlistener() {     @override     public void onqueryinventoryfinished(iabresult result, inventory inventory) {         if(result.issuccess()) {             ispremium = inventory.haspurchase(constants.sku_premium);             log.d(constants.tag, "app " + (ispremium ? "premium" : "not premium"));         }     } };

asynctask useful, , helps put long-running jobs onto background thread, , give nice clean mechanism updating ui before, during, , after background task runs ... without messing threads directly.

some other android apis, however, setup let initiate calls on main (ui) thread, , behind-the-scenes, work on background thread (they using asynctask, although don't care).

in case, iabhelper methods you're using asynchronous, , allow initiate them main thread, without blocking ui.

therefore, there no need run them in same asynctask#doinbackground() method you're using other work, work off main thread.

i see 2 options:

1) concurrent loading / iab request

ideally, if need load data @ startup (and using asynctask this), also kick off in-app billing request @ same time.

you describe main activity, i'm assuming app starts splash activity of kind (?). in splash activity, use:

public void oncreate(bundle savedinstancestate) {     new myloadingasynctask().execute();      checkforpremiumpurchase(); }

and launch main activity when iab check completes:

public void onqueryinventoryfinished(iabresult result, inventory inventory) {     ispremium = false;     if(result.issuccess()) {         ispremium = inventory.haspurchase(constants.sku_premium);         log.d(constants.tag, "app " + (ispremium ? "premium" : "not premium"));     }     intent = new intent(self, mainactivity.class);     i.putextra("ispremium", ispremium);     startactivity(i); }

this assumes network iab transaction take longer app's normal "loading" process. (post comment if assumption isn't valid, , i'll handle case)

2) serialized loading, iab

if there's else app's design requires "finish loading" , then initiate iab request, can call checkforpremiumpurchase() when asynctask finishes work:

 protected void onpostexecute(long result) {      checkforpremiumpurchase();  }

asynctask#onpostexecute() gets called on main thread when loading completes, , checkforpremiumpurchase() safe call on main thread.

comment

in general, i'd recommend against delaying startup of app check premium upgrade. ideally, you'd find clever way save state (premium purchased) once, , avoid future checks. users appreciate that.

however, don't know difference between free / premium app, , whether difference shows ... so, maybe can't avoid.


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