user interface - Android : first activity launched -

-

a strange behavior i'm tearing eyes on since afternoon, i'm givin understanding perhaps has idea (yeah, i'm beginner, has idea ^^).

situation :

mainactivity.java (first 1 called, 1 of interest here)

    public expandablelistview listclubs;      @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main);      listclubs = (expandablelistview) findviewbyid(r.id.explstmainclubs);     appglobal.createdistricts() ;      elvadapterdistrictsclubs adapter = new elvadapterdistrictsclubs(this);           listclubs.setadapter(adapter);       }

it's code in class. basically, i'm filling expandablelist adapter relies on what's created in createdistricts() method (creates business objects, districts containing clubs containing members, events, etc.).

basically (again ^^), runs fine, on first start explist works expected, rest of app. if hit button mainactivity, however, , rerun app, "strange" (to me @ least) behavior occurs :

the explist loaded twice in row - first 1 data, works fine, , below duplicate (with same 2 groups, i.e. here 2 districts in sample data), doesn't work @ (if try expand it, crashes app).

frankly, i'm lost - i've tried things on various on[pause/stop/destroy/start/resume] etc. no avail (therefore, there yet nothing done on side, no override, seems not bring good).

as oncreate after ondestroy load bundle, should load explist were, , in case there might conflict between "old" groups/children , actual ones (currently, data simulated, afterward come remote data source), , haven't decided yet best "save" behavior is, i.e. if should find way obliterate explist ondestroy in order sure it's 100% recreated anew (and how 1 ?) , start scratch, or if use explist is, while updating it's content, in order not lose previous selection. may irrelevant complicate matters in order that, first list being not big , quite used reach second activity...

anyway, suspect comes around part, bundle load after destroy , rerunning, reload explist , add things instead of first deleting ? found confusing next activity (reached clicking 1 of items of explist) displays similar explist (filled months , events per month selected club), , doesn't present same strange behavior after destroy... , both have identical explist declaration in original xml layout so... well, perhaps tomorrow morning i'll see light, if has idea, feel free :d

the more write, more think should first clear explist but... don't see how exactly. i've tried

listclubs.removeviewsinlayout(0, listclubs.getcount()) ;

but doesn't seem anything.

thanks in advance

nothing related android behavior - recreating everytime whole set of bo behind if base arraylist of districts not null... instead of getting out of method, raises question - how state of arraylist, declared in subclass of application serving application in manifest ? i'll have make tests that...


Popular posts from this blog

How to calculate SNR of signals in MATLAB? -

-
i've encountered simple, yet fundamental problem on calculating snr: there several signals : s1 = original , pure clean signal without noise. n1 = white gaussian noise going added s1. s2 = s1 + n1 (the noisy signal before performing noise-reduction algorithm) s3 = noise-reduced signal (after performing noise reduction algorithm) n2 = s3 - s1 (the amount of noise after performing noise-reduction algorithm) now want compare snr before , after performing noise-reduction algorithm. which signals should consider snr_before!? s1/n1 or s2/n1 ? which signals should consider snr_after!? s3/n1 or s3/n2 ? which commands or functions should use in matlab in order compute snr_before , snr_after? thanks billion putting time on helping me. what know calculating snr before : snrbeforenoise = mean( signal .^ 2 ) / mean( noise .^ 2 ); and snr after : residual_noise = signal - noise_reduced_signal; snr_after = mean( signal .^ 2 ) / mean( residual_noise .^ 2
Read more

c# - Attempting to upload to FTP: System.Net.WebException: System error -

-
i have api takes in xml , uploads files based on information in xml. uploads on schedule (also xml), , have tested surrounding , know works. i getting error 40% of time on first file attempt upload in each time cycle (time cycle = 45 minutes files, 30 minutes others). here code upload: try { loggerftp.log("uploading file: " + filename, false); // create request. ftpwebrequest request = (ftpwebrequest)webrequest.create(appsettingsftp.ftpurl + @"/" + filename); request.method = webrequestmethods.ftp.uploadfile; request.timeout = 6000000; //set 100 minutes //request.timeout = -1; //set infinite // add login credentials. request.credentials = new networkcredential(appsettingsftp.ftplogin, appsettingsftp.ftppassword); // grab file contents. streamreader sourcestream = new streamreader(appsettingsftp.uploadfiledirectory + filename); byte[] filecontents = encoding.utf8.getbytes(sourcestream.readtoend()); sourcest
Read more

ios - UISlider customization: how to properly add shadow to custom knob image -

-
Image
i need place custom knob image shadow uislider. far have image of 38x38, of there region defines shadow of knob. now while using image, when slide knob extreme ends actual knob not able cover end points, hence end points visible under transparent region of knob image this code using customize uislider uiimage *slidebtimg = [uiimage imagenamed:sliderknobimg]; [self.ratingslider setthumbimage:slidebtimg forstate:uicontrolstatenormal]; [self.ratingslider setthumbimage:slidebtimg forstate:uicontrolstatehighlighted]; how can implement custom knob shadow beneath it, covering end points?? look inside uislider.h , there methods let customize slider knob , track needed. (ios 2.0 , above) // lets subclass lay out track , thumb needed - (cgrect)minimumvalueimagerectforbounds:(cgrect)bounds; - (cgrect)maximumvalueimagerectforbounds:(cgrect)bounds; - (cgrect)trackrectforbounds:(cgrect)bounds; - (cgrect)thumbrectforbounds:(cgrect)bounds trackrect:(cgrect)rect value:
Read more