I have an json like this:
{"status": "ok","data": {
"0": {
"id": "1901",
"price": "0",
"userBought": "0",
"leagueName": "Germany League",
"teamOne": "Grossaspach",
"teamTwo": "Offenbacher",
"date": "05.11.2021 - 21.00",
"result": "0",
"teamOneScore": "0",
"teamTwoScore": "0",
"info": "+1.5 Goal Over",
"ratio": "1.19"
},
"1": {
"id": "1900",
"price": "0",
"userBought": "0",
"leagueName": "France League",
"teamOne": "FC Villefranche-Beaujolai",
"teamTwo": "US Avranches",
"date": "05.11.2021 - 21.00",
"result": "0",
"teamOneScore": "0",
"teamTwoScore": "0",
"info": "+1.5 Goal Over",
"ratio": "1.25"
},
"2": {
"id": "1899",
"price": "0",
"userBought": "0",
"leagueName": "Germany League",
"teamOne": "Holstein Kiel",
"teamTwo": "Dynamo Dresden",
"date": "05.11.2021 - 20.30",
"result": "0",
"teamOneScore": "0",
"teamTwoScore": "0",
"info": "+1.5 Goal Over",
"ratio": "1.20"
}}}
But I could not get string objects from “data” tag using volley because there is no any json array to foreach tag.
I tired and I search so much examples. I could’nt find any solution from stacoverflow. Any one can help me?
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Answer
I am not familiar with Volley, but a straightforward way is to desceailize your JSON string to a Map
with most JSON libraries(e.g., Jackson), then you can get the content of field data
and traverse it as follows:
ObjectMapper objectMapper = new ObjectMapper();
Map<String, Object> resultMap = objectMapper.readValue(jsonStr, new TypeReference<Map<String, Object>>() {});
((Map<String, Object>) resultMap.get("data")).entrySet().stream()
.map(Map.Entry::getValue)
.forEach(System.out::println);
Console output:
{id=1901, price=0, userBought=0, leagueName=Germany League, teamOne=Grossaspach, teamTwo=Offenbacher, date=05.11.2021 – 21.00, result=0, teamOneScore=0, teamTwoScore=0, info=+1.5 Goal Over, ratio=1.19}
{id=1900, price=0, userBought=0, leagueName=France League, teamOne=FC Villefranche-Beaujolai, teamTwo=US Avranches, date=05.11.2021 – 21.00, result=0, teamOneScore=0, teamTwoScore=0, info=+1.5 Goal Over, ratio=1.25}
{id=1899, price=0, userBought=0, leagueName=Germany League, teamOne=Holstein Kiel, teamTwo=Dynamo Dresden, date=05.11.2021 – 20.30, result=0, teamOneScore=0, teamTwoScore=0, info=+1.5 Goal Over, ratio=1.20}
You can also get the same result by using Jayway JsonPath:
Map<String, Object> resultMap = JsonPath.parse(jsonStr).read("$.data");
resultMap.entrySet().stream()
.map(Map.Entry::getValue)
.forEach(System.out::println);