Java:java.lang.NullPointerException:尝试调用虚方法' java.util.ArrayList

时间:2014-12-07 16:47:08

标签: java android

我正在为vk.com编写客户端并收到错误。

我使用碎片,我认为它是由碎片引起的。

过程:ru.dennes544.vkapp,PID:9357     java.lang.NullPointerException:尝试调用虚方法'java.util.ArrayList com.perm.kate.api.Api.getProfiles(java.util.Collection,java.util.Collection,java.lang.String,java.lang空对象引用上的.String,java.lang.String,java.lang.String)'             在ru.dennes544.vkapp.Profile $ 1.run(Profile.java:89)

几行代码:

private void loadAccInfo(){
    new Thread(){
        @Override
        public void run(){
            Collection uid = new ArrayList();
            try {
                uid.add(account.user_id);
                profiles = api.getProfiles(uid, null, "sex", "Nom", null, null).get(0);
            } catch (IOException e) {
                e.printStackTrace();
            } catch (JSONException e) {
                e.printStackTrace();
            } catch (KException e) {
                e.printStackTrace();
            }

和getProfiles声明:

public ArrayList<User> getProfiles(Collection<Long> uids, Collection<String> domains, String fields, String name_case, String captcha_key, String captcha_sid) throws IOException, JSONException, KException{
    if (uids == null && domains == null)
        return null;
    if ((uids != null && uids.size() == 0) || (domains != null && domains.size() == 0))
        return null;
    Params params = new Params("users.get");
    if (uids != null && uids.size() > 0)
        params.put("user_ids",arrayToString(uids));
    if (domains != null && domains.size() > 0)
        params.put("user_ids",arrayToString(domains));
    params.put("fields",fields);
    params.put("name_case",name_case);
    addCaptchaParams(captcha_key, captcha_sid, params);
    JSONObject root = sendRequest(params);
    JSONArray array=root.optJSONArray("response");
    return User.parseUsers(array);
}

0 个答案:

没有答案