解析数据org.json.JSONException时出错：类型java.lang.String的值无法转换为JSONArray

Question

我正在从Android应用程序连接到外部数据库。 它是使用PHP JSON的MS SQL Server。 我已成功连接到数据库并在浏览器中获得结果。 来到android时，我没有得到任何结果，它显示Error Parsing Data org.json.JSONException: Value of type java.lang.String cannot be converted to JSONArray 。 下面是我的代码。

getDatabase.php

<?php header('content-type: application/json; charset=utf-8');
$myServer = "example";
$myUser = "user";
$myPass = "pq";
$myDB = "dbname"; 


$conn = new COM ("ADODB.Connection")
or die("Cannot start ADO");


$connStr ="PROVIDER=SQLOLEDB;SERVER=".$myServer.";
UID=".$myUser.";PWD=".$myPass.";DATABASE=".$myDB; 
$conn->open($connStr); 


$query = "SELECT parkingtitle,address FROM parkd_dailyparkingslots";


$rs = $conn->execute($query);

$num_columns = $rs->Fields->Count();

for ($i=0; $i < $num_columns; $i++) {
$fld[$i] = $rs->Fields($i);
}


while (!$rs->EOF)  
{

for ($i=0; $i < $num_columns; $i++) {
    print(json_encode($fld[$i]->value));
}

$rs->MoveNext(); //move on to the next record
}


$rs->Close();
$conn->Close();

$rs = null;
$conn = null;
?>

数据库活动

public class Database extends Activity {
/** Called when the activity is first created. */

TextView resultView;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.database);
    StrictMode.enableDefaults(); // STRICT MODE ENABLED
    resultView = (TextView) findViewById(R.id.result);
    getData();
}

public void getData() {
    String result = "";
    InputStream isr = null;
    try {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(
                "http://www.example.com/getDatabase.php"); 

        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        isr = entity.getContent();
    } catch (Exception e) {
        Log.e("log_tag", "Error in http connection " + e.toString());
        resultView.setText("Couldnt connect to database");
    }
    // convert response to string
    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                isr, "utf-8"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        isr.close();

        result = sb.toString();
    } catch (Exception e) {
        Log.e("log_tag", "Error  converting result " + e.toString());
    }

    // parse json data
    try {
        String s = "";
        JSONArray jArray = new JSONArray(result);
        for (int i = 0; i < jArray.length(); i++) {
            String json = jArray.getString(i); // JSONObject
            // json = jArray.getJSONObject(i);
            JSONObject jObj = new JSONObject(json);

            s = s + "Name: " + jObj.getString("parkingtitle") + "\n\n"
                    + "Address: " + jObj.getString("address") + "\n\n";
        }
        resultView.setText(s);

    } catch (Exception e) {
        // TODO: handle exception
        Log.e("log_tag", "Error Parsing Data " + e.toString());
    }
}
}

我在谷歌搜索并检查了所有帖子，但没有得到任何解决方案。 请帮我。 提前致谢。

Answer 1

尝试使用：

JSONObject jObj = jArray.getJSONObject(i);

代替：

jArray.getString(i); // JSONObject // json = jArray.getJSONObject(i); 
JSONObject jObj = new JSONObject(json);