android - Getting appid using package name -

i use market api in order gather information applications market.

i use following code in order app id.

    public void getappinfo() {      appsrequest appsrequest = appsrequest.newbuilder()             .setappid("org.ajeje.locservice15")                            .setwithextendedinfo(true)             .build();     session.append(appsrequest, new callback<appsresponse>() {    @override    public void onresult(responsecontext context, appsresponse response) {     list<app> apps = response.getapplist();     (app app : apps) {          system.out.println("title of application is:"+app.gettitle());         } }   });    session.flush();   } 

except "com.example.android" setappid , above code not yield response.

is there alternate method appid of application when have package name application in market?

any appreciated.