Android: How to get JSON object keys from this json:

问题

This is the JSON array:

 {
    "server_response": [{
        "Total": "135",
        "Paid": "105",
        "Rest": "30"
    }]
}

So, how can i get the object names? I want to put them in separate TextView. Thanks.

回答1:

Put this out side everything. I mean outside onCreate() and all.

private <T> Iterable<T> iterate(final Iterator<T> i){
    return new Iterable<T>() {
        @Override
        public Iterator<T> iterator() {
            return i;
        }
    };
}

For getting the names of objects :

    try
    {
        JSONObject jsonObject = new JSONObject("{" +"\"server_response\": [{" +"\"Total\": \"135\"," +"\"Paid\": \"105\"," +"\"Rest\": \"30\"" +"}]"+"}";);
        JSONArray jsonArray = jsonObject.getJSONArray("server_response");
        JSONObject object = jsonArray.getJSONObject(0);

        for (String key : iterate(object.keys())) 
        {
            // here key will be containing your OBJECT NAME YOU CAN SET IT IN TEXTVIEW.
            Toast.makeText(HomeActivity.this, ""+key, Toast.LENGTH_SHORT).show();
        }

    } catch (JSONException e) {
        e.printStackTrace();
    }

Hope this helps :)

回答2:

My suggestion:

Go to this website:
Json to pojo

Get your pojo classes and then use them in Android.
All you need to do is to use Gson.fromGson(params here).
One of your params is the class that you created using the online schema.

回答3:

You can use jackson ObjectMapper to do this.

public class ServerResponse {

 @JsonProperty("Total") 
 private String total;
 @JsonProperty("Paid") 
 private String paid;
 @JsonProperty("Rest") 
 private String rest;

 //getters and setters
 //toString()
}

//Now convert json into ServerResponse object
ObjectMapper mapper = new ObjectMapper();
TypeReference<ServerResponse> serverResponse = new TypeReference<ServerResponse>() { };
Object object = mapper.readValue(jsonString, serverResponse);
 if (object instanceof ServerResponse) {
    return (ServerResponse) object;
 }

回答4:

JSONObject jsonObject = new JSONObject("Your JSON");
int Total = jsonObject.getJSONArray("server_response").getJSONObject(0).getInt("Total");
int Paid = jsonObject.getJSONArray("server_response").getJSONObject(0).getInt("Paid");
int Rest = jsonObject.getJSONArray("server_response").getJSONObject(0).getInt("Rest");

来源：https://stackoverflow.com/questions/37323044/android-how-to-get-json-object-keys-from-this-json

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java

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json

android-studio

jsonobject