How to parse a JSON Input stream

Kotlin version with Gson

to read the response JSON:

val response = BufferedReader(
                   InputStreamReader(conn.inputStream, "UTF-8")
               ).use { it.readText() }

to parse response we can use Gson:

val model = Gson().fromJson(response, YourModelClass::class.java)

This example reads all objects from a stream of objects, it is assumed that you need CustomObjects instead of a Map:

        ObjectMapper mapper = new ObjectMapper();
        JsonParser parser = mapper.getFactory().createParser( source );
        if(parser.nextToken() != JsonToken.START_ARRAY) {
          throw new IllegalStateException("Expected an array");
        }
        while(parser.nextToken() == JsonToken.START_OBJECT) {
          // read everything from this START_OBJECT to the matching END_OBJECT
          // and return it as a tree model ObjectNode
          ObjectNode node = mapper.readTree(parser);
          CustomObject custom = mapper.convertValue( node, CustomObject.class );
           // do whatever you need to do with this object
          System.out.println( "" + custom );
        }
        parser.close();

This answer was composed by using : Use Jackson To Stream Parse an Array of Json Objects and Convert JsonNode into Object

I suggest use javax.json.Json factory as less verbose possible solution:

JsonObject json = Json.createReader(yourInputStream).readObject();

Enjoy!

if you have JSON file you can set it on assets folder then call it using this code

InputStream in = mResources.getAssets().open("fragrances.json"); 
// where mResources object from Resources class

{
    InputStream is = HTTPClient.get(url);
    InputStreamReader reader = new InputStreamReader(is);
    JSONTokener tokenizer = new JSONTokener(reader);
    JSONObject jsonObject = new JSONObject(tokenizer);
}