我正在尝试通过json从mysql数据库中获取数据。
我面临的问题是
Error parsing data org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject
我在这里发布完整的代码..
Visit.Java
public class Visit extends TabFragment {
public Visit(){};
JSONObject jsonobject;
JSONArray ownerObj;
ListView listview;
ListViewAdapter3 listadapter;
ArrayList<HashMap<String, String>> arraylist;
String uname = "null";
SessionManager session;
private static String url_visitor = "http://10.0.2.2/portal/fetchinforder.php";
JSONParser jParser = new JSONParser();
ArrayList<String> itemwod = new ArrayList<String>();
ArrayList<String> itemorder = new ArrayList<String>();
ArrayList<String> item_remark= new ArrayList<String>();
ArrayList<String> o_username= new ArrayList<String>();
View view;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
// don't look at this layout it's just a listView to show how to handle the keyboard
session = new SessionManager(getActivity().getApplicationContext());
// get user data from session
HashMap<String, String> user = session.getUserDetails();
// name
String name = user.get(SessionManager.KEY_NAME);
// email
String email = user.get(SessionManager.KEY_EMAIL);
View view = inflater.inflate(R.layout.activity_visit, container, false);
getActivity().setTitle("Visit");
listview = (ListView) view.findViewById(R.id.lvvisit);
new DownloadJSON().execute();
return view;
}
@Override
public void onSaveInstanceState(Bundle outState) {
//add the values which need to be saved from the drawer to the bundle
// outState = result.saveInstanceState(outState);
super.onSaveInstanceState(outState);
}
private class DownloadJSON extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Create a progressdialog
//mProgressDialog = new ProgressDialog(getActivity());
// mProgressDialog.setTitle("Please Wait");
// Set progressdialog message
//mProgressDialog.setMessage("Loading...");
//mProgressDialog.setIndeterminate(false);
// Show progressdialog
//mProgressDialog.show();
}
@Override
protected Void doInBackground(Void... args) {
// Create an array
try {
arraylist = new ArrayList<HashMap<String, String>>();
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", uname));
JSONObject json = jParser.makeHttpRequest(url_visitor, "POST", params);
int success1 = Integer.parseInt(json.getString("success3"));
Log.d("success3", json.toString());
if (success1 == 0)
{
Snackbar.make(view, "Not Data Found", Snackbar.LENGTH_LONG).show();
}
if (success1 == 1) {
ownerObj = json.getJSONArray("Ordera");
// arraylist = new ArrayList<HashMap<String, String>>();
// Retrieve JSON Objects from the given URL address
// Locate the array name in JSON
// jsonarray = jsonobject.getJSONArray("images");
for (int i = 0; i < ownerObj.length(); i++) {
// HashMap<String, String> map = new HashMap<String, String>();
jsonobject = ownerObj.getJSONObject(i);
// Retrive JSON Objects
if (jsonobject.getString("username").equalsIgnoreCase(uname))
{
itemwod.add(jsonobject.getString("itemwod"));
item_remark.add(jsonobject.getString("itemremark"));
itemorder.add(jsonobject.getString("itemorder"));
o_username.add(jsonobject.getString("o_username"));
}
}
}
}
catch (Exception e)
{
}
return null;
}
@Override
protected void onPostExecute(Void args) {
// Locate the listview in listview_main.xml
listview = (ListView) getActivity().findViewById(R.id.lvvisit);
listadapter = new ListViewAdapter3(getActivity(), itemwod,item_remark,itemorder,o_username);
// Set the adapter to the ListView
listview.setAdapter(listadapter);
// Close the progressdialog
// mProgressDialog.dismiss();
}
}
}
现在， ListViewAdapter3.Java
package com.example.sachin.omcommunication;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.HashMap;
public class ListViewAdapter3 extends BaseAdapter {
Context cntx;
ArrayList<String> itemwod = new ArrayList<String>();
ArrayList<String> itemorder = new ArrayList<String>();
ArrayList<String> item_remark= new ArrayList<String>();
// ArrayList<String> item_date = new ArrayList<String>();
LayoutInflater inflater;
ArrayList<HashMap<String, String>> data;
public ListViewAdapter3(Context context,
ArrayList<String> itm_wod,
ArrayList<String> itm_order,
ArrayList<String> itm_remark,
ArrayList<String> o_username
) {
// TODO Auto-generated constructor stub
cntx = context;
itemwod = itm_wod;
itemorder = itm_order;
item_remark = itm_remark;
o_username = o_username;
}
@Override
public int getCount() {
return itemorder.size();
}
@Override
public Object getItem(int position) {
return itemorder.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@SuppressWarnings("deprecation")
public View getView(final int position, View convertView, ViewGroup parent) {
TextView lvtaskname,lvtaskdetails,lvtaskremark,lvtaskdate;
inflater = (LayoutInflater) cntx
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LayoutInflater inflater = LayoutInflater.from(cntx);
convertView = inflater.inflate(R.layout.raw_order, parent,
false);
lvtaskname= (TextView) convertView.findViewById(R.id.lvtaskname);
lvtaskdetails = (TextView) convertView.findViewById(R.id.lvtaskdetails);
lvtaskremark = (TextView) convertView.findViewById(R.id.lvtaskremark);
//lvtaskdate = (TextView) convertView.findViewById(R.id.lvtaskdate);
lvtaskname.setText(itemwod.get(position));
lvtaskdetails.setText(itemorder.get(position));
lvtaskremark.setText(item_remark.get(position));
//lvtaskdate.setText(item_date.get(position));
return convertView;
}
}
最后我的布局
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginTop="10dp"
android:layout_weight="73"
android:orientation="vertical">
<ListView
android:id="@+id/lvvisit"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
我尝试过它没有工作得到同样的错误。
答案 0 :(得分：0)
根据错误消息，您的JSON字符串中似乎没有有效的JSON结构（<br !!!）
您必须检查服务器端的JSON输出，而不是Android代码。
您可以使用http://jsonlint.com/来验证JSON