java - Android httpGET JSON 数组

Question

目标:调用此函数并查看从 php 返回的 JSON 数组，查看是否 element[0] 或 [1] == 1。PHP 查询 boolean 值表，我想知道其中哪些是 1 和 0为了继续功能。

我有这个函数来执行 httpGET 并返回 JSON 对象

  class CheckVotingStatus extends AsyncTask<String, String, String> {

    /**
     * Before starting background thread Show Progress Dialog
     * */
    boolean failure = false;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(Vote.this);
        pDialog.setMessage("Checking vote Status...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(true);
        pDialog.show();
    }

    @Override
    protected String doInBackground(String... args) {
        // TODO Auto-generated method stub
        // Check for success tag
        int success;

        try {
            // Building Parameters


            Log.d("request!", "starting");
            // getting product details by making HTTP request
            JSONObject json = jParser.getJSONFromUrl(LOGIN_URL);

            // check your log for json response
           // Log.d("Login attempt", json.toString());

            // json success tag
            success = json.getInt(TAG_SUCCESS);

            if (success == 1) {
               // Log.d("Login Successful!", json.toString());

                JSONArray answerObj = json.getJSONArray(TAG_ANSWER);

                // get first product object from JSON Array
               JSONObject answer = answerObj.getJSONObject(0);
                String bool1s = answer.getString(TAG_BOOL1);
                JSONObject answer2 = answerObj.getJSONObject(1);
                String bool2s = answer2.getString(TAG_BOOL2);

                /******************************************/
                if (bool1s.equals("1")&& bool2s.equals("0"))
                {
                   startVoting = true;
                }
                else if (bool1s.equals("0")&& bool2s.equals("1"))
                {
                    endVoting = true;
                    voted = false;

                }
                /*******************************************/
                //return json.getString(TAG_MESSAGE);
            }
            else
            {
                //Log.d("Login Failure!", json.getString(TAG_MESSAGE));
                //return json.getString(TAG_MESSAGE);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;
    }

    protected void onPostExecute(String file_url) {
        // dismiss the dialog once product deleted
        pDialog.dismiss();
        if (file_url != null){
            Toast.makeText(Vote.this, file_url, Toast.LENGTH_LONG).show();
        }

    }

我的 PHP 页面查询从数据库返回两个 boolean 值

$response = array();
$resttt = "SELECT startingBool, endingBool FROM vote_count";
$result = mysql_query("$resttt");
if (mysql_num_rows($result) > 0) {

    $result = mysql_fetch_array($result);

    $answer = array();
    $answer["startingBool"] = $result["startingBool"];            
    $answer["endingBool"] = $result["endingBool"];
    // success
    $response["success"] = 1;

    $response["answer"] = array();

    array_push($response["answer"], $answer);

    // echoing JSON response
    echo json_encode($response);

}

我遇到了输入异常结束和没有答案值(value)的错误

JSON 解析器

 public JSONObject getJSONFromUrl(final String url) {


    // Making HTTP request
    try {
        // Construct the client and the HTTP request.
        //DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpClient httpClient = createHttpClient();
        HttpGet httpGet = new HttpGet(url);
        // Execute the POST request and store the response locally.
        HttpResponse httpResponse = httpClient.execute(httpGet);
        // Extract data from the response.
        HttpEntity httpEntity = httpResponse.getEntity();
        // Open an inputStream with the data content.
        is = httpEntity.getContent();

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    try {
        // Create a BufferedReader to parse through the inputStream.
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                is, "iso-8859-1"), 8);
        // Declare a string builder to help with the parsing.
        StringBuilder sb = new StringBuilder();
        // Declare a string to store the JSON object data in string form.
        String line = null;

        // Build the string until null.
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }

        // Close the input stream.
        is.close();
        // Convert the string builder data to an actual string.
        json = sb.toString();
    } catch (Exception e) {
        Log.e("Buffer Error", "Error converting result " + e.toString());
    }

    // Try to parse the string to a JSON object
    try {
        Log.v("JSON", json);
        jObj = new JSONObject(json);
    } catch (JSONException e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }

    // Return the JSON Object.
    return jObj;

}

Answer 1

你的 php 回显必须是这样的

{"success":1,"answer":[{"bool1":"0","bool2":"1"}]}

和你的 php 脚本

//conect to database, create table bool_table, insert data to bool_table.......


$response = array();
$resttt = "SELECT bool1, bool2 FROM bool_table";
$result = mysql_query("$resttt");
if (mysql_num_rows($result) > 0) {

        $result = mysql_fetch_array($result);

        $answer = array();
        $answer["bool1"] = $result["bool1"];            
        $answer["bool2"] = $result["bool2"];
        // success
        $response["success"] = 1;

        $response["answer"] = array();

        array_push($response["answer"], $answer);

        // echoing JSON response
        echo json_encode($response);

    }

并解析 JSON

private static final String TAG_SUCCESS = "success";
private static final String TAG_ANSWER = "answer";
private static final String TAG_BOOL1 = "bool1";
private static final String TAG_BOOL2 = "bool2";
int success;

......
...


                    JSONObject json = jsonParser.makeHttpRequest("xxxxxxxxxxxxxx", "GET", params);

                    // json success tag
                    success = json.getInt(TAG_SUCCESS);
                    if (success == 1) {
                        // successfully received product details
                        JSONArray answerObj = json.getJSONArray(TAG_ANSWER);

                        // get first product object from JSON Array
                        JSONObject answer = answerObj.getJSONObject(0);


                        String bool1s = answer.getString(TAG_BOOL1));
                        String bool2s = answer.getString(TAG_BOOL2));
                        }else{
                        .......
                        ....