Getting element of JSON object when key isn't the same [Android] -


i want learn bit more android , wanted create app track price of cryptocurrencies. choosed api: https://www.cryptocompare.com/api/#introduction

my problem following: when want list of coin json response looks this: 

{   "response": "success",   "message": "coin list succesfully returned!",   "baseimageurl": "https://www.cryptocompare.com",   "baselinkurl": "https://www.cryptocompare.com",   "data": {     "42": {       "id": "4321",       "url": "/coins/42/overview",       "imageurl": "/media/19984/42.png",       "name": "42",       "coinname": "42 coin",       "fullname": "42 coin (42)",       "algorithm": "scrypt",       "prooftype": "pow",       "fullypremined": "0",       "totalcoinsupply": "42",       "preminedvalue": "n/a",       "totalcoinsfreefloat": "n/a",       "sortorder": "34"     },     "365": {       "id": "33639",       "url": "/coins/365/overview",       "imageurl": "/media/352070/365.png",       "name": "365",       "coinname": "365coin",       "fullname": "365coin (365)",       "algorithm": "x11",       "prooftype": "pow/pos",       "fullypremined": "0",       "totalcoinsupply": "2300000000",       "preminedvalue": "299000000",       "totalcoinsfreefloat": "n/a",       "sortorder": "916"     },

(here url use (https://www.cryptocompare.com/api/data/coinlist/)

i want keep informations coin (everything "data") key isn't same.

how can informations create differents coins?

thank's in advance

you can use jsonobject#names() keys jsonarray , loop jsonarray.

    jsonobject data = response.getjsonobject("data");      jsonarray array = data.names(); // contains keys inside data      // loop array      (int = 0; < array.length(); i++ ) {         string key = array.getstring(i); // 42 or 365 example code         jsonobject obj = data.getjsonobject(key); //  contains jsonobject of key 42 or 365     }

another way use jsonobject#keys() uses iterator , hasnext() iteration less performance efficient above normal for loop approach in android.


Comments

Post a Comment

Popular posts from this blog

What is happening when Matlab is starting a "parallel pool"? -

running parallel cpu processes in matlab starts command parpool() according documentation , function: [creates] special job on pool of workers, , [connects] matlab client parallel pool. this function takes bit of time execute, on order of 30 seconds. in other multi-cpu paradigms openmp, parallel execution seems totally transparent -- i've never noticed behavior analogous matlab (granted i'm not experienced parallel programming). so, happening between time parpool() called , when finishes executing? takes long? parallel computing toolbox enables run matlab code in parallel using several different paradigms (e.g. jobs , tasks, parfor , spmd , parfeval , batch processing), , run either locally (parallelised across cores in local machine) or remotely (parallelised across machines in cluster - either 1 own, or 1 in cloud). in of these cases, code run on matlab workers , copies of matlab without interactive desktop. if you're intending run on remo...
Read more

angular - DownloadURL return null in below code -

when change file updated in firebase storage when try downloadurl show null. filechange(event: any) { const imagefolder: string = this.employee.id; const filelist: filelist = event.target.files; const file: file = filelist[0]; const storageref = firebase.storage().ref().child(`${imagefolder}/profile.jpg`).put(file); console.log(storageref.snapshot.downloadurl); } the put() asynchronous. if want url after file uploaded have this: firebase.storage().ref().child(`${imagefolder}/profile.jpg`).put(file).then((snapshot) => { storageref = snapshot.downloadurl: console.log(snapshot.downloadurl); });
Read more

php - Cannot override Laravel Spark authentication with own implementation -

during login process of laravel spark need request token of remote api. api stores exact same users , passwords laravel spark application. therefore need username , non hashed password of user during authentication process. i thought overriding authenticated method solution problem. in routes/web.php override post /login endpoint , pointing endpoint own logincontroller: <?php namespace app\http\controllers\auth; use illuminate\support\facades\log; use illuminate\http\request; use laravel\spark\http\controllers\auth\logincontroller sparklogincontroller; class logincontroller extends sparklogincontroller { /** * create new login controller instance. * * @return void */ public function __construct() { parent::__construct(); } /** * handle successful authentication attempt. * * @param request $request * @param \illuminate\contracts\auth\authenticatable $user * @return response */ public fu...
Read more