无法在列表视图上逐个显示JSON数组

Question

我在列表视图中显示从Mysql检索数据时遇到问题。我正在使用JSON从数据库中检索我的数据。

目前，我的结果会在列表视图中显示：

["Tonight","Lalala","All of me","A moment like this"]

但我希望它是这样的：

Tonight
Lalala
All of me
A moment like this

感谢有人可以帮助我，谢谢！

Java代码：

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    layout = inflater.inflate(R.layout.fragment_saresult, container, false);

    lvSAResult = (ListView)layout.findViewById(R.id.lvSAResult);
    etSAQn = (EditText)layout.findViewById(R.id.etSAQn);

    getQuestion();
    getData();

    arrayList = new ArrayList<String>();

    return layout;
}

public void getQuestion(){

    // Retrieving data using bundle
    Bundle bundle = this.getArguments();
    searchName = (String.valueOf(bundle.getString("searchName")));
    searchPw = (String.valueOf(bundle.getString("searchPw")));
}

public void getData(){
    url = Config.STAT_URL_SA+searchName+Config.STAT_URL_SA2+searchPw;

    StringRequest stringRequest = new StringRequest(url, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            showJSON(response);
            displayResult(response);
        }
    },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    //Toast.makeText(getActivity(),"No existing question", Toast.LENGTH_LONG).show();
                    Toast.makeText(getActivity(), error.getMessage().toString(),Toast.LENGTH_LONG).show();
                }
            });

    RequestQueue requestQueue= Volley.newRequestQueue(getActivity());
    requestQueue.add(stringRequest);
}

public void showJSON(String response) {

    question = "";

    try
    {
        JSONObject jsonObjectSa = new JSONObject(response);
        JSONArray resultSa = jsonObjectSa.getJSONArray(Config.JSON_ARRAY);
        JSONObject collegeDataSa = resultSa.getJSONObject(0);
        question = collegeDataSa.getString(Config.KEY_QUESTION);

        for(int i=0; i < resultSa.length(); i++)
        {
            jsonObjectSa = resultSa.getJSONObject(i);
            answer = collegeDataSa.getString(Config.KEY_ANSWER);
            arrayList.add(answer);
        }

        flag = 1;

    } catch (JSONException e) {
        e.printStackTrace();
    }
}

private void displayResult(String response){

    // Display the question retrieved from the database
    etSAQn.setText(question);

    // Display the result retrieved from the database
    if(flag == 1)
    {
        adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1,arrayList);
        lvSAResult.setAdapter(adapter);
    }
}

PHP代码：

<?php

    if($_SERVER['REQUEST_METHOD']=='GET') {

        $searchname = $_GET['searchname'];
        $searchpassword = $_GET['searchpassword'];

        require "conn.php";

        $sql = "SELECT * FROM shortansparticipator WHERE searchname = '".$searchname."' AND searchpassword = '".$searchpassword."'";
        $r = mysqli_query($conn,$sql);
        $result = array();
        $answer = array();

        if($r) 
        {
            while($row = mysqli_fetch_array($r, MYSQL_ASSOC))
            {
                $answer[] = $row['answer'];
                $question = $row['question'];
            }

            array_push($result,array("question"=>$question, "answer"=>$answer));
            echo json_encode(array("result"=>$result)); 
        }
        else
        {
            echo "No connection";
        }

        $conn->close();
    }
?>