Question

我正在Android中创建一个应用程序并试图从我使用MVC在C＃中创建的服务中读取Json值。该服务正在返回以下Json响应。

[{"empID":"1","Fname":"Khayyam","SurName":"Studenti","DOB":null,"gender":null},{"empID":"2","Fname":"Student 2","SurName":"Zaheer","DOB":null,"gender":null}]

程序的以下部分是从Web服务获取值并以字符串形式存储。

_input = new BufferedReader(new InputStreamReader(_urlConnection.getInputStream()));

String _data;
StringBuilder _Sb = new StringBuilder();

while((_data = _input.readLine() )!=null){
    _Sb.append(_data);
    _Sb.append(System.getProperty("line.separator"));
}

_RestfulString= _Sb.toString();

.....

和AsyncTask的postExecution

protected void onPostExecute(Void unused){
    JSONObject _response;
    try{
        _response = new JSONObject(_RestfulString);
        JSONArray  _jsonNodes = _response.optJSONArray("rest");

        for(int x=0; x< _RestfulString.length();x++){
            JSONObject _childNode = _jsonNodes.getJSONObject(x);
            Log.d("Fname",_childNode.optString("Fname"));
            txtFname.setText(_childNode.optString("Fname"));
            txtSname.setText(_childNode.optString("SurName"));
            txtDOB.setText(_childNode.optString("DOB"));
        }

    } 
    catch (Exception exp) {
        Log.d("Excetpion",exp.getMessage());
        _pDialog.hide();
    }
}

一旦程序点击

_response = new JSONObject(_RestfulString);

它引发了

的例外

Value [{"empID":"1","Fname":"Muhammad Khayyam","SurName":"Qureshii","DOB":null,"gender":null},{"empID":"2","Fname":"Sobia","SurName":"Zaheer","DOB":null,"gender":null}]

of type org.json.JSONArray cannot be converted to JSONObject

Answer 1

可以清楚地看到输入位于JSONObject，您正试图将其转换为JSONObject，而您想要的0可能是JSONArray arr=new JSONArray(_RestfulString); _response=arr.getJSONObject(0);的索引。请尝试下面的代码

margin-top: 1em;

org.json.JSONArray无法转换为JSONObject ANDROID

1 个答案: