分析数据org.json.JSONException时出错:无法将值字符串转换为JSONArray

这是列表活动。

列出活动：

public class ListDataActivity extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.layout_listview);
    url = "http://xxx.xx.x.xxx/index.php";
    Bundle c = getIntent().getExtras();
    blo = c.getString("blood");
    new ProgressTask(ListDataActivity.this).execute();
}
@Override
public void onBackPressed() {
    // TODO Auto-generated method stub
    super.onBackPressed();
}
class ProgressTask extends AsyncTask<String, Void, Boolean> {
    ArrayList<HashMap<String, String>> jsonlist = new ArrayList<HashMap<String, String>>();
    ConnectivityManager conMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    {
        if (conMgr.getActiveNetworkInfo() != null
                && conMgr.getActiveNetworkInfo().isAvailable()
                && conMgr.getActiveNetworkInfo().isConnected()) {
        } else {
            Toast.makeText(getApplicationContext(),
                    "INTERNET CONNECTION NOT PRESENT", Toast.LENGTH_SHORT)
                    .show();
            startActivity(new Intent(ListDataActivity.this,
                    MainActivity.class));
        }
    }

    public ProgressTask(ListActivity activity) {
        context = activity;
    }
    private Context context;
    protected void onPreExecute() {
    }
    @Override
    protected void onPostExecute(final Boolean success) {
    ListAdapter adapter = new SimpleAdapter(context, jsonlist,
                R.layout.row_listitem, new String[] { name, Category },
                new int[] { R.id.vehicleType, R.id.vehicleColor }) {
            @Override
            public View getView(int position, View convertView,
                    ViewGroup parent) {
                if (convertView == null) {
                    // This a new view we inflate the new layout
                    LayoutInflater inflater = (LayoutInflater) context
                            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                    convertView = inflater.inflate(R.layout.row_listitem,
                            null);
                }
                // TODO Auto-generated method stub
                if (position % 2 == 1) {
                    convertView.setBackgroundColor(Color.rgb(120, 151, 66));
                } else {
                    convertView.setBackgroundColor(Color.rgb(86, 107, 129));
                }
                return super.getView(position, convertView, parent);
            }
        };
        setListAdapter(adapter);
        lv = getListView();
        lv.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
            }
        });
    }
    protected Boolean doInBackground(final String... args) {
            url = url + "?blo_name=" + blo;
        Log.d("", url);
        baseAdapter jParser = new baseAdapter();
        JSONArray json = jParser.getJSONFromUrl(url);
        if (json != null) {
            for (int i = 0; i < json.length(); i++) {
                try {
                    JSONObject c = json.getJSONObject(i);
                    String vtype = c.getString(name);
                    String vfuel = c.getString(Category);
                    HashMap<String, String> map = new HashMap<String, String>();
                    // Add child node to HashMap key & value
                    map.put(name, vtype);
                    map.put(Category, vfuel);
                    jsonlist.add(map);
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }

基本适配器类：

public class baseAdapter {
static InputStream iStream = null;
static JSONArray jarray = null;
static String json = "";
public baseAdapter() {
}
public JSONArray getJSONFromUrl(String url) {
    StringBuilder builder = new StringBuilder();
    HttpClient client = new DefaultHttpClient();
    HttpGet httpGet = new HttpGet(url);
    try {
        HttpResponse response = client.execute(httpGet);
        StatusLine statusLine = response.getStatusLine();
        int statusCode = statusLine.getStatusCode();
        if (statusCode == 200) {
            HttpEntity entity = response.getEntity();
            InputStream content = entity.getContent();
            BufferedReader reader = new BufferedReader(
                    new InputStreamReader(content));
            String line;
            while ((line = reader.readLine()) != null) {
                builder.append(line);
            }
        } else {
            Log.e("==>", "Failed ");
        }
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    // Parse String to JSON object
    try {
        jarray = new JSONArray(builder.toString());
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }
    // return JSON Object
    return jarray;
}

php:

if(isset($_POST['blo_name'])){
$str = $_POST['blo_name'];
$sql = "SELECT * FROM blood_group where Category IN ($str)";
$result = mysql_query($sql);
while($row=mysql_fetch_array($result))  
$output[]=$row;
print(json_encode($output));
mysql_close();
}

我的问题是，我正在尝试解析bol字符串，它的值类似于bol="'B-','O-'";，而我解析这种类型的值时，它没有显示结果，并给出logcat。

logcat:

Error parsing data org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONArray

当我解析像"B,O"这样的简单值并在DB中进行更改时，它会给我很好的结果。但是，我需要解析这个值。请帮帮我。谢谢