Java 获取字符串的Json异常
我调用了一个异步任务,它返回一个json对象,该对象的结果、消息为字符串,结果为代价 虽然它显示结果,但在响应对象中的消息字符串中,它将json异常显示为结果的无值 异步任务Java 获取字符串的Json异常,java,android,json,jsonexception,Java,Android,Json,Jsonexception,我调用了一个异步任务,它返回一个json对象,该对象的结果、消息为字符串,结果为代价 虽然它显示结果,但在响应对象中的消息字符串中,它将json异常显示为结果的无值 异步任务 public class SearchPostsAsyncTask extends AsyncTask<String, Void, JSONObject> { String api; JSONObject jsonParams; Context mContext; private
public class SearchPostsAsyncTask extends AsyncTask<String, Void, JSONObject> {
String api;
JSONObject jsonParams;
Context mContext;
private SearchPostsCallBack searchPostsCallBack;
private ProgressDialog loadingDialog;
private Snackbar snackbar;
private LinearLayout parentLayout;
private ArrayList<PostDelivery> list;
private JSONArray listsArray;
private JSONObject jsonObject;
public SearchPostsAsyncTask(Context context, LinearLayout linearLayout,SearchPostsCallBack searchPostsCallBack) {
this.mContext = context;
this.searchPostsCallBack = searchPostsCallBack;
this.parentLayout = linearLayout;
}
public interface SearchPostsCallBack {
void doPostExecute(ArrayList<PostDelivery> list);
}
@Override
protected void onPreExecute() {
super.onPreExecute();
loadingDialog = new ProgressDialog(mContext);
if (!isOnline()) {
snackbar = Snackbar.make(parentLayout, R.string.check_network, Snackbar.LENGTH_LONG);
snackbar.show();
} else {
loadingDialog.show(mContext, null,mContext.getString(R.string.wait));
}
}
@Override
protected JSONObject doInBackground(String... params) {
try {
api = mContext.getResources().getString(R.string.url) + "requestlist";
jsonParams = new JSONObject();
jsonParams.put("st_lati", params[0]);
jsonParams.put("st_longi", params[1]);
jsonParams.put("ed_lati", params[2]);
jsonParams.put("ed_longi", params[3]);
jsonParams.put("pt_date", params[4]);
ServerRequest request = new ServerRequest(api, jsonParams);
return request.sendPostRequest(params[5]);
} catch (JSONException je) {
Log.e("exception",je.toString());
return Excpetion2JSON.getJSON(je);
} catch (Exception ue) {
return Excpetion2JSON.getJSON(ue);
}
}
@Override
protected void onPostExecute(JSONObject response) {
super.onPostExecute(response);
if (loadingDialog.isShowing())
loadingDialog.dismiss();
try {
list = new ArrayList<>();
String result = response.getString("result");
String message = response.getString("message");
if (result.equals("1")) {
listsArray = response.getJSONArray("cost");
for (int j = 0; j < listsArray.length(); j++) {
jsonObject = listsArray.getJSONObject(j);
PostDelivery postDelivery = new PostDelivery();
postDelivery.setmPt_id(jsonObject.getString("pt_id"));
postDelivery.setmPt_name(jsonObject.getString("pt_name"));
postDelivery.setmPtDetail(jsonObject.getString("pt_detail"));
postDelivery.setmPtStartLoc(jsonObject.getString("pt_start_loc"));
postDelivery.setmPtEndLoc(jsonObject.getString("pt_end_loc"));
postDelivery.setmPtDate(jsonObject.getString("pt_date"));
list.add(postDelivery);
searchPostsCallBack.doPostExecute(list);
}
}
snackbar = Snackbar.make(parentLayout, "sorry", Snackbar.LENGTH_LONG);
snackbar.show();
}catch (JSONException je) {
je.printStackTrace();
// Toast.makeText(getApplicationContext(), je.getMessage(), Toast.LENGTH_LONG).show();
}
}
}
这里出了什么问题?请帮助。谢谢。在您的ServerResponse
{“result”:1}
中,“result”是int,您使用的是String result=response.getString(“result”)
,您应该使用getInt
{“结果”:1
,“消息”:“成功”,“成本”:[{“pt_id”:“5”,“ur_id”:“2”,“pt_名称”:“手机”,“pt_详情”:“三星”
移动式,“pt_尺寸”:“0”,“pt_重量”:“150”,“pt_开始位置”:“纳希克”}]}
从所附的响应
中,似乎结果
的值是一个int
值,您试图使用以下方法获取该值:
String result = response.getString("result"); // WRONG
尝试使用:
int result = response.getInt("result");
结果是一个整数。请参阅,没有双引号!!我也曾尝试过int,因为我得到了相同的异常。在获取响应值之前,请在
onPostExecute
中添加一些日志以检查响应。我也曾尝试过int,因为我得到了相同的异常。
int result = response.getInt("result");