org.json.JSONException：字符处未终止的数组

Question

我正在尝试使用PHP和JSON在MySQL Google地图活动中添加来自MySQL的数据。

这是我的PHP脚本：

<?php
mysql_connect("localhost","root",""); 
mysql_select_db("TripTun"); 
mysql_query("SET NAMES 'utf8'");
$sql=mysql_query("select * from etablissement");
while($row=mysql_fetch_assoc($sql))
$output[]=$row;
print (json_encode($output)) ; 
mysql_close();
?>   

这是执行php脚本后的json结果

[{"idet":"1","lang":"36.703816","latt":"10.406306"},{"idet":"2","lang":"36.707162","latt":"10.408623"},{"idet":"3","lang":"36.711325","latt":"10.415039"}]

这是我在地图活动中的Java代码：

package com.example.el_boj.triptun;
import android.os.StrictMode;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.util.Log;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
public class Map extends FragmentActivity {
private GoogleMap mMap;
private static LatLng BORJ_CEDRIA = new LatLng(36.705657, 10.406992);
private static final String LOG_TAG = "TripTun/map.php";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    StrictMode.ThreadPolicy policy = new  StrictMode.ThreadPolicy.Builder().permitAll().build();
    StrictMode.setThreadPolicy(policy);
    setContentView(R.layout.act_map);
    setUpMapIfNeeded();

}

@Override
protected void onResume() {
    super.onResume();
    setUpMapIfNeeded();
}


private void setUpMapIfNeeded() {
    if (mMap == null) {  mMap=((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map))
                .getMap();
        // Check if we were successful in obtaining the map.
        if (mMap != null) {
            setUpMap();
        }
    }
}

   private void setUpMap() {
    mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(BORJ_CEDRIA,15));
    new Thread(new Runnable() {
        public void run() {
            try {
                retrieveAndAddCities();
            } catch (IOException e) {
                Log.e(LOG_TAG, "Cannot retrive cities", e);
            }
        }
    }).start();
}
protected void retrieveAndAddCities() throws IOException {
    InputStream is = null;
    String result = "";
    try{
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://10.0.3.3/TripTun/map.php");
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        is = entity.getContent();

    }catch(Exception e){
        Log.e("log_tag", "Error in http connection " + e.toString());
    }
    try{
        assert is != null;
        BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
            sb.append(line);
        }
        is.close();
         result = sb.toString().substring(0, sb.toString().length()-1);
    }catch(Exception e){
        Log.e("log_tag", "Error converting result " + e.toString());
    }
    try {
        JSONArray jsonArray = new JSONArray(result);
        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject jsonObj = jsonArray.getJSONObject(i);
            mMap.addMarker(new MarkerOptions().position(new LatLng(
                            jsonObj.getJSONArray("lang").getDouble(0),
                            jsonObj.getJSONArray("latt").getDouble(1)
                    ))
            );
        }
    } catch (JSONException e) {
        Log.e(LOG_TAG, "Error processing JSON", e);
    }
}

}

我收到此错误：

03-12 15:42:07.983    2358-2410/com.example.el_boj.triptun E/TripTun/map.php﹕ Error processing JSON
org.json.JSONException: Unterminated array at character 153 of [{"idet":"1","lang":"36.703816","latt":"10.406306"},{"idet":"2","lang":"36.707162","latt":"10.408623"},{"idet":"3","lang":"36.711325","latt":"10.415039"}
        at org.json.JSONTokener.syntaxError(JSONTokener.java:450)
        at org.json.JSONTokener.readArray(JSONTokener.java:440)
        at org.json.JSONTokener.nextValue(JSONTokener.java:103)
        at org.json.JSONArray.<init>(JSONArray.java:92)
        at org.json.JSONArray.<init>(JSONArray.java:108)
        at com.example.el_boj.triptun.Map.retrieveAndAddCities(Map.java:129)
        at com.example.el_boj.triptun.Map$1.run(Map.java:94)
        at java.lang.Thread.run(Thread.java:818)