java - VK SDK for android problems -

java - VK SDK for android problems -

i'm using android studio. i've downloaded vk sdk github , added in project file.also import it

import com.perm.kate.api.api;

i authorize, friends it

api api = new api(account.access_token, constants.api_id); users = api.getfriends(account.user_id, "photo", null, null, null);

insert them in db

sharedpreferences prefs = preferencemanager.getdefaultsharedpreferences(c); sharedpreferences.editor editor = prefs.edit(); for(int =0; i< users.size();++i){ editor.putstring("friendfirstname" + string.valueof(i), users.get(i).first_name); editor.putstring("friendlastname"+ string.valueof(i), users.get(i).last_name); editor.putstring("friendphoto"+ string.valueof(i), users.get(i).photo); } editor.commit();

after, can of friend's name , it's working fine:

names.add(prefs.getstring("friendfirstname" + string.valueof(i), null) +" "+prefs.getstring("friendlastname" + string.valueof(i), null) );

but whenever seek photo or photo_medium_rec or kind of photo gives me null

toast.maketext(getactivity(),string.valueof(prefs.getstring("friendphoto0", null)) ,toast.length_long).show();//null

why giving null?

addition

i'm new in programming, here of dumb questions vk sdk. should utilize api or request methods this:

vkrequest request = vkapi.uploadwallphotorequest(new vkuploadimage(photo, vkimageparameters.jpgimage(0.9f)), 0, 0);

is there difference between them? how utilize request? , how personal user information? couldn't fined methods in api it.

try utilize official vk sdk (link). , maybe helpfull (link)

java android sdk vk vk-sdk