I am parsing data from json, like this.
private void dataClass() {
Intent intent = getIntent();
String Fdate = intent.getStringExtra("date");
// creating a variable for storing our string.
String url = "https://coindar.org/api/v2/events?access_token={token}&filter_date_start=" + Fdate;
// creating a variable for request queue.
RequestQueue queue = Volley.newRequestQueue(this.getApplicationContext());
// making a json object request to fetch data from API.
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
@SuppressLint("NotifyDataSetChanged")
@Override
public void onResponse(JSONArray response) {
// inside on response method extracting data
// from response and passing it to array list
// on below line we are making our progress
// bar visibility to gone.
loadingPB.setVisibility(View.GONE);
try {
// extracting data from json.
for (int i = 0; i < response.length(); i++) {
JSONObject jsonObject = response.getJSONObject(i);
String caption = jsonObject.getString("caption");
String source = jsonObject.getString("source");
String sourceReliable = jsonObject.getString("source_reliable");
String important = jsonObject.getString("important");
int coinID = jsonObject.getInt("coin_id");
String priceChange = jsonObject.getString("coin_price_changes");
int tagNumber = jsonObject.getInt("tags");
// adding all data to our array list.
calendarEventModalArrayList.add(new CalendarEventModal(caption, source, sourceReliable, important, coinID, priceChange, tagNumber));
}
// notifying adapter on data change.
calendarEventRVAdapter.notifyDataSetChanged();
} catch (JSONException e) {
// handling json exception.
e.printStackTrace();
Toast.makeText(CalendarEvent.this, "Something went amiss. Please try again later", Toast.LENGTH_SHORT).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// displaying error response when received any error.
Toast.makeText(CalendarEvent.this, "Something wentaaaamiss. Please try again later", Toast.LENGTH_SHORT).show();
}
}) {
};
// calling a method to add our
// json object request to our queue.
queue.add(jsonArrayRequest);
}
and json object is something like this,
{
"caption": "Landing Page Launch",
"source": "https://coindar.org/en/event/bzx-protocol-bzrx-landing-page-launch-56269",
"source_reliable": "true",
"important": "false",
"date_public": "2021-11-25 15:32",
"date_start": "2021-12-08",
"date_end": "",
"coin_id": "8630",
"coin_price_changes": "7.24",
"tags": "15"
},
I am getting the coin Id, and now from that coin ID, i want to scan another json file, for that specific id, and get name or symbol from there,
the other json contains,
{
"id": "1",
"name": "Bitcoin",
"symbol": "BTC",
"image_32": "https://coindar.org/images/coins/bitcoin/32x32.png",
"image_64": "https://coindar.org/images/coins/bitcoin/64x64.png"
},
{
"id": "2",
"name": "Ethereum",
"symbol": "ETH",
"image_32": "https://coindar.org/images/coins/ethereum/32x32.png",
"image_64": "https://coindar.org/images/coins/ethereum/64x64.png"
},
this continues for over 11,000 coins :(.
My bindviewholder method,
public void onBindViewHolder(@NonNull CalendarEventRVAdapter.CalendarEventViewHolder holder, int position) {
// on below line we are setting data to our item of
// recycler view and all its views.
CalendarEventModal modal = calendarEventModal.get(position);
holder.headingTV.setText(modal.getCaption());
holder.priceChangeTV.setText(modal.getPriceChange() + "% from event announcement");
if(modal.getSourceReliable().matches("true")) {
holder.sourceReTV.setText("Source: Reliable");
}
if(modal.getSourceReliable().matches("false")) {
holder.sourceReTV.setText("Source: Not-reliable");
}
}
Now my question is, how I can on bindviewholder class get the coin ID from first json, and then scan second json for that id and get name of coin and then do holder.settext stuff.
Now i am parsing second json as below,
private void dataClass2() {
// creating a variable for storing our string.
String url = "https://coindar.org/api/v2/coins?access_token={token}";
// creating a variable for request queue.
RequestQueue queue = Volley.newRequestQueue(this.getApplicationContext());
// making a json object request to fetch data from API.
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
@SuppressLint("NotifyDataSetChanged")
@Override
public void onResponse(JSONArray response) {
// inside on response method extracting data
// from response and passing it to array list
// on below line we are making our progress
// bar visibility to gone.
try {
// extracting data from json.
for (int i = 0; i < response.length(); i++) {
JSONObject jsonObject = response.getJSONObject(i);
int cdID = jsonObject.getInt("id");
String cdnName = jsonObject.getString("symbol");
String cdsImage = jsonObject.getString("image_64");
// adding all data to our array list.
calendarCoinModalArrayList.add(new CalendarCoinModal(cdID, cdnName, cdsImage));
}
// notifying adapter on data change.
} catch (JSONException e) {
// handling json exception.
e.printStackTrace();
Toast.makeText(Calendar.this, "Something went amiss. Please try again later", Toast.LENGTH_SHORT).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
// displaying error response when received any error.
Toast.makeText(Calendar.this, "Something wentaaaamiss. Please try again later", Toast.LENGTH_SHORT).show();
}
}) {
};
// calling a method to add our
// json object request to our queue.
queue.add(jsonArrayRequest);
}
Also, while parsing second json
private ArrayList<CalendarCoinModal> calendarCoinModalArrayList;
private CalendarCoinRVAdapter calendarCoinRVAdapter;
}
calendarCoinModalArrayList = new ArrayList<>();
// initializing our adapter class.
calendarCoinRVAdapter = new CalendarCoinRVAdapter(calendarCoinModalArrayList, this);
// calling get data method to get data from API.
dataClass();
Help would be appreciated.
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Answer
Before setting the test using settext, you need to load the information about the second JSON content. Try this to read json information from the file.
public String loadJSONFromResource() {
String json = null;
try {
InputStream is = getActivity().getResources().openRawResource(R.raw.coindata);
int size = is.available();
byte[] buffer = new byte[size];
is.read(buffer);
is.close();
json = new String(buffer, "UTF-8");
} catch (IOException ex) {
ex.printStackTrace();
return null;
}
return json;
}
To search based on the id property, Assuming you used an ArrayList.
CalendarCoinModal obj;
int searchId = somevalue;
for(CalendarCoinModal currObj : calendarCoinModalArrayList) {
if(currObj.id == somevalue) {
obj = currObj;
break;
}
}