我想连接到 Api url,检索 json 并将所有内容存储在对象列表中。 Here is an example url 可以以 Json 形式返回的内容。
向我提供了以下代码,但它返回错误无法解析我的 Activity
第31行
中的方法setOnResponse
这是我的activity.java
public class resultOverview_activity extends Activity implements onResponse{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.result_overview);
Bundle search_activity_data = getIntent().getExtras();
if(search_activity_data == null){
return;
}
String URL = "http://www.gw2spidy.com/api/v0.9/json/item-search/Sunrise";
AsyncTask parkingInfoFetch = new AsyncFetch(this);
parkingInfoFetch.setOnResponse(this);
parkingInfoFetch.execute(URL);
//Log.i("gw2Log", parkingInfoFetch.);
}
@Override
public void onResponse(JSONObject object) {
Log.d("Json Response", "Json Response" + object);
ResultClass resultClass = new ResultClass();
try {
resultClass.setCount(object.getInt("count"));
resultClass.setPage(object.getInt("page"));
resultClass.setLast_page(object.getInt("last_page"));
resultClass.setTotal(object.getInt("total"));
JSONArray array = new JSONArray(object.getString("results"));
for (int i = 0; i < resultClass.getTotal(); i++) {
JSONObject resultsObject = array.getJSONObject(i);
resultClass.setData_id(resultsObject.getInt("data_id"));
resultClass.setName(resultsObject.getString("name"));
resultClass.setRarity(resultsObject.getInt("rarity"));
resultClass.setRestriction_level(resultsObject
.getInt("restriction_level"));
resultClass.setImg(resultsObject.getString("img"));
resultClass.setType_id(resultsObject.getInt("type_id"));
resultClass.setSub_type_id(resultsObject.getInt("sub_type_id"));
resultClass.setPrice_last_changed(resultsObject
.getString("price_last_changed"));
resultClass.setMax_offer_unit_price(resultsObject
.getInt("max_offer_unit_price"));
resultClass.setMin_sale_unit_price(resultsObject
.getInt("min_sale_unit_price"));
resultClass.setOffer_availability(resultsObject
.getInt("offer_availability"));
resultClass.setSale_availability(resultsObject
.getInt("sale_availability"));
resultClass.setSale_price_change_last_hour(resultsObject
.getInt("sale_price_change_last_hour"));
resultClass.setOffer_price_change_last_hour(resultsObject
.getInt("offer_price_change_last_hour"));
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
AsyncFetch.java 类
public class AsyncFetch extends AsyncTask<String, Void, JSONObject> {
public AsyncFetch(Context context) {
this.context = context;
}
private Context context;
private JSONObject jsonObject;
private onResponse onResponse;
public onResponse getOnResponse() {
return onResponse;
}
public void setOnResponse(onResponse onResponse) {
this.onResponse = onResponse;
}
@Override
protected JSONObject doInBackground(String... params) {
// TODO Auto-generated method stub
try {
HttpGet get = new HttpGet(params[0]);
HttpClient client = new DefaultHttpClient();
HttpResponse response = client.execute(get);
HttpEntity entity = response.getEntity();
String result = EntityUtils.toString(entity);
jsonObject = new JSONObject(result);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return jsonObject;
}
@Override
protected void onPostExecute(JSONObject result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
this.onResponse.onResponse(result);
}
public interface onResponse {
public void onResponse(JSONObject object);
}
}
当然还有constructur
ResultClass
,我认为没有必要将其作为代码包含在此处。
此错误无法解析方法 setOnResponse
是什么意思以及如何解决此问题?
最佳答案
更改此行:
AsyncTask parkingInfoFetch = new AsyncFetch(this);
对此:
AsyncFetch parkingInfoFetch = new AsyncFetch(this);
该错误意味着该行:
parkingInfoFetch.setOnResponse(this);
正在尝试调用子类AsyncFetch
中定义的方法,但您将变量定义为父类AsyncTask
,它没有方法setOnResponse
.
关于java - Android java解析Json从url到对象列表,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29588667/