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我正在製作匯率應用程序,並且屏幕上顯示的圖表顯示了過去7天內所選貨幣的變化情況。RxJava2按順序排放物品
現在我想要得到的是嚴格排序項目。
這裏是我的代碼:
public class GraphInteractorImpl implements GraphInteractor {
private final Retrofit retrofit;
@Inject
public GraphInteractorImpl(Retrofit retrofit) {
this.retrofit = retrofit;
}
@Override
public void downloadData(GraphListener listener) {
RestAPI api = retrofit.create(RestAPI.class);
List<String> listDates = getDates();
for (String date : listDates) {
Observable<List<ExchangeRate>> observable = api.getExchangeRatesForLast7days(date);
observable.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(
listener::onSuccess,
listener::onFailure
);
}
}
private List<String> getDates() { //returns last 7 days in a list
List<String> listDate = new ArrayList<>();
Calendar calendarToday = Calendar.getInstance();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH);
String today = simpleDateFormat.format(calendarToday.getTime());
Calendar calendarDayBefore = Calendar.getInstance();
calendarDayBefore.setTime(calendarDayBefore.getTime());
int daysCounter = 0;
while (daysCounter <= 7) {
if (daysCounter == 0) { // means that its present day
listDate.add(today);
} else { // subtracts 1 day after each pass
calendarDayBefore.add(Calendar.DAY_OF_MONTH, -1);
Date dateMinusOneDay = calendarDayBefore.getTime();
String oneDayAgo = simpleDateFormat.format(dateMinusOneDay);
listDate.add(oneDayAgo);
}
daysCounter++;
}
return listDate;
}
}
此代碼讓我正確的價值觀,但他們不是爲了使我得到錯誤值的具體日期。
所以我要做的是同時執行7個調用,我猜測與zip操作符,但我沒有拿出這個解決方案,所以任何類型的幫助將不勝感激。
API文檔可以在這裏找到:http://hnbex.eu/api/v1/