android - Retrieve device Gmail accounts -

i trying accounts info configured in gmail application, like, username, email address, etc.

i using below code -

public arraylist<string> get_email_addresses() {     arraylist<string> names = new arraylist<>();      account[] accounts = accountmanager.get(feedbackfragment.this.getactivity()).getaccounts();      if (accounts == null) {         toast.maketext(feedbackfragment.this.getactivity(),                 "cannot access email accounts database",                 toast.length_short).show();         return null;     }      if (accounts.length <= 0) {         toast.maketext(feedbackfragment.this.getactivity(),                 "no accounts found",                 toast.length_short).show();         return null;     }      (account account : accounts){         names.add(account.name);         toast.maketext(feedbackfragment.this.getactivity(),account.name, toast.length_short).show();     }     return names; } 

but no retrieves info have configured multiple accounts , returns message "no accounts found".

is wrong in code? have idea how rectify this?

thank you!