null - Android getting JSONObject Exception -


i'm getting jsonobject exception in cases twitter value in json object media null in below code, though check make sure i'm not assigning value if is. way checking correct? or how can avoid code throwing exception , allow me check if twitter value there or not?

if(nextactivityobject.getjsonobject("media") != null){      media = nextactivityobject.getjsonobject("media");     log.d("next media object not empty", media.tostring());      if(media.getstring("twitter") != null &&  media.getstring("facebook") != null){          log.d("both not null", "both not null");          twitter = media.getstring("twitter");          facebook = media.getstring("facebook");            intent.putextra("twitter", twitter);           intent.putextra("facebook", facebook);       }       else if(media.getstring("twitter") != null){             twitter = media.getstring("twitter");            log.d("just twitter not null", twitter.tostring());            intent.putextra("twitter", twitter);       }       else if(media.getstring("facebook") != null){           facebook = media.getstring("facebook");           log.d("just facebook not null", facebook.tostring());           intent.putextra("facebook", facebook);       }   }

you can use media.optstring("twitter");. , need media.has("twitter") distinguish between "no key called twitter" , "twitter key has empty string value".

to sum up, "twitter" key, write

 else if(media.has("twitter")){        twitter = media.optstring("twitter");        // here twitter non-null string        log.d("just twitter not null", twitter.tostring());        intent.putextra("twitter", twitter);   }

Comments

Post a Comment

Popular posts from this blog

resizing Telegram inline keyboard -

telegram's inline keyboard great feature lots of different use cases. inline buttons added list of items this: inline_keyboard = [[inlinekeyboardbutton(text="button", callback_data="button"), inlinekeyboardbutton(text="reset",callback_data="reset")]] inline_keyboard_markup = inlinekeyboardmarkup(inline_keyboard) update.message.reply_text("hi", reply_markup=inline_keyboard_markup) the above code adds 2 buttons each half width of chat screen. i know the normal keyboard button there resize_keyboard parameter somehow can used. my question is there way resize inline buttons ? example make full width or quarter width. unfortunately, can't now. :( you can suggest @botsupport , might add feature next version.
Read more

javascript - How to bind ViewModel Store to View? -

i'm pretty new ext js , trying embed multiselect inside panel . the viewmodel has stores property can see here: ext.define('test.view.controls.search.searchfiltermodel', { extend: 'ext.app.viewmodel', alias: 'viewmodel.filter', data: { title: '' }, stores: { test: { fields: [ 'id', 'name' ], proxy: { type: 'ajax', url: 'api/test', reader: 'array' }, autoload: true } } }); i bind in view this: viewmodel: { type: 'filter' }, layout: 'fit', border: 1, plain: true, scrollable: 'y', layout: 'fit', bind: { title: '{title}', }, items: { xtype: 'multiselect', scrollable: false, allowblank: true, ddreorder: true, bind: { store: '{test}' }, valuefield: 'id', displayfield: 'name' } ...
Read more

c - Why does alarm() cause fgets() to stop waiting? -

i playing around signals in c. main function asks input using fgets(name, 30, stdin) , , sits there , waits. set alarm alarm(3) , , reassigned sigalrm call function myalarm calls system("say pay attention") . after alarm goes off, fgets() stops waiting input , main fn continues on. happens if change myalarm set variable , nothing it. void myalarm(int sig) { //system("say pay attention"); int x = 0; } int catch_signal(int sig, void (*handler)(int)) { // when signal comes in, "catch" , "handle it" in way want struct sigaction action; // create new sigaction action.sa_handler = handler; // set it's sa_handler attribute function specified in header sigemptyset(&action.sa_mask); // "turn signals in sa_mask off?" "set sa_mask contian no signals, i.e. nothing masked?" action.sa_flags = 0; // not sure, looks aren't using of available flags, whatever may return sigaction(sig, ...
Read more