问题
I am currently using the Retrofit2.0 to poll the server .I am getting the result in x second but the problem is page number is not updating in the API.Lets come to the code for better clarification
private void startPolling() throws Exception {
Log.e("APP CONSTANT","" + current_page);
MrSaferWebService service = ServiceFactory.createRetrofitService(MrSaferWebService.class, AppConstants.BASE_URL);
final Observable<ReportResponse> reportResponseObservable = service.getListOfInciden("get_report", current_page, 5, incident_lat, incident_long);
Observable.interval(0,20,TimeUnit.SECONDS)
.flatMap(new Func1<Long, Observable<ReportResponse>> () {
@Override
public Observable<ReportResponse> call(Long aLong) {
return reportResponseObservable;
}
})
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Action1<ReportResponse>() {
@Override
public void call(ReportResponse response) {
Log.i("HEARTBEAT_INTERVAL", "Response from HEARTBEAT");
ActivityUtils.showProgress(false, mRootView, mProgressView, mContext);
if (response.getStatus() == 1) {
current_page = current_page + 1;
if (!response.getReportList().isEmpty()) {
addItems(response.getReportList());
}
else{
//do nothing
}
} else {
Log.e("MY ERROR", "" + "SOME ERROR OCCURED");
}
}
}, new Action1<Throwable>() {
@Override
public void call(Throwable throwable) {
ActivityUtils.showProgress(true, mRootView, mProgressView, mContext);
// TODO: 22/03/16 ADD ERROR HANDLING
}
});
}
As you can see i have incremented the current_page by 1 every time on SuccessFull Response but when i check the Log the current_page value are increased only once and after that log are not there and hence there value is also not increasing..So it taking the the same page number every time and giving me the Duplicate response.
Please help me to find what i am missing.
回答1:
After spending more than a day i just changed Action with Subscriber and everything seems to be working .I don't know what happen internally but it works . I am still trying to figure it out what the difference between Action and Subscriber. Below are my updated code which did the tricks.
private void startPolling() throws Exception {
final MrSaferWebService service = ServiceFactory.createRetrofitService(MrSaferWebService.class, AppConstants.BASE_URL);
Observable
.interval(0,20,TimeUnit.SECONDS)
.flatMap(new Func1<Long, Observable<ReportResponse>>() {
@Override
public Observable<ReportResponse> call(Long aLong) {
Log.e("PAGE", "" + current_page);
return service.getListOfInciden("get_report", current_page, 5, incident_lat, incident_long);
}
})
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Subscriber<ReportResponse>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
e.printStackTrace();
if (mProgressView !=null && mRootView !=null) {
ActivityUtils.showProgress(false, mRootView, mProgressView, mContext);
}
}
@Override
public void onNext(ReportResponse response) {
if (mProgressView !=null && mRootView !=null) {
ActivityUtils.showProgress(false, mRootView, mProgressView, mContext);
}
if (response.getStatus() == 1) {
if (!response.getReportList().isEmpty()){
current_page = current_page + 1;
addItems(response.getReportList());
}
else{
//do nothing
}
} else {
Log.e("MY ERROR", "" + "SOME ERROR OCCURED");
}
}
});
}
来源：https://stackoverflow.com/questions/37993484/retrofit-periodic-call-with-pagination