我有以下问题:
我已经为我的服务器返回对象实现了一个API,这一切都很好。对API的所有调用都会启动AsyncTask
,并在方法中返回结果。问题是,在返回的事件列表中,有一点(我需要这是错误的编码,但忽略了一分钟)。这些事件是从一个AsyncTask
调用返回的,并用于另一个AsyncTask
调用,我需要将我正在迭代的事件传递给下一个API调用,如下所示:
api.retrieveEvents(new GetResponseCallback<Event>() {
@Override
public void onDataReceived(ArrayList<Event> list) {
for (Event e : list) {
api.retrieveReservationsForEvent(e, new GetResponseCallback<EventRegistration>() {
@Override
public void onDataReceived(ArrayList<EventRegistration> list) {
Log.d("We are in event", e.getEventName());
}
});
现在很明显,Java不会允许你在类范围之外使用局部变量,而不会将其声明为final。这显然不会在这里工作,我也无法将事件分配给字段变量,因为这只会导致我正在迭代的最终事件成为retrieveReservationsForEvent
调用所有用途的事件。关于该怎么做的任何想法?
retrieveReservationsForEvent看起来像这样:
public void retrieveReservationsForEvent(Event event, final GetResponseCallback<EventRegistration> callback) {
final ArrayList<EventRegistration> eventRegistrations = new ArrayList<>();
String restUrl = SERVER_NAME + REST_EVENTREGISTRATION + event.getId();
new GetTask(restUrl, new RestTaskCallback() {
@Override
public void onComplete(String response) {
try {
// TODO probably throws an exception if there is only one attendant...
JSONArray jsonArray = new JSONArray(response);
for(int i = 0; i < jsonArray.length(); i++) {
JSONObject tempEventRegistrationJSON = (JSONObject) jsonArray.get(i);
long dateInMillis = tempEventRegistrationJSON.getLong("timeOfArrival");
Date date = new Date(dateInMillis);
EventRegistration tempEventRegistration = new EventRegistration(tempEventRegistrationJSON.getInt("id"),
tempEventRegistrationJSON.getInt("eventNightId"), tempEventRegistrationJSON.getInt("guestId"),
date, tempEventRegistrationJSON.getInt("numberOfGuests"));
tempEventRegistration.setGuestName(tempEventRegistrationJSON.getString("guestName"));
tempEventRegistration.setGuestPhoneNumber(tempEventRegistrationJSON.getInt("phoneNumber"));
tempEventRegistration.setGuestMail("mail");
eventRegistrations.add(tempEventRegistration);
callback.onDataReceived(eventRegistrations);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}).execute();
}
GetTask只是在做一个GET请求,返回响应。
答案 0 :(得分:1)
您确定将其更改为:
function mutation(str1, str2){
for (var i = 0; i < str2.length; i++) {
var index = str1.indexOf(str2.charAt(i));
if (index == -1) return false;
str1 = str1.substr(0, index) + str1.substr(index + 1);
}
return true;
}
不起作用?编译时是否会出错?