如何在Android中解析JSON數據

Question

如何在Android中讀取PHP文件發送的Json數據

這是PHP代碼

$data = array("name" => "Hagrid", "age" => "36");                                                                    
$data_string = json_encode($data);  
echo $data_string;

這是讀取數據的代碼android json

InputStream instream = entity.getContent();

// String result = "";
Log.i("--------etat---------r","-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-");

String result = this.convertStreamToString(instream);
Log.i("--------etat---------r","-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx-");

這是分析InputStream對象的方法

public  String convertStreamToString(InputStream is) {

        convertStreamToString " );

        BufferedReader reader = new BufferedReader(new InputStreamReader(is));

        StringBuilder sb = new StringBuilder();

        String line = null;
        try {

            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");

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

        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();

            }
        }

        return sb.toString();

    }

但是這是顯示的代碼

11-15 10:46:58.744: I/Read from server(526): Call Stack 11-15 10:46:58.744: I/Read from server(526): #TimeMemoryFunctionLocation 11-15 10:46:58.744: I/Read from server(526): 10.0006142200{main}( )..\\younesservices.php : 0 11-15 10:46:58.744: I/Read from server(526): 11-15 10:46:58.744: I/Read from server(526): {"name":"Hagrid","age":"36"} 11-15 10：46：58.744：I /從服務器（526）讀取：11-15 10：46：58.744：I /從服務器（526）讀取：（！）SCREAM：11-15 10的錯誤抑制被忽略： 46：58.744：I /從服務器讀取（526）：（！）注意：未定義的索引：C：\\ wamp \\ www \\ younes_project \\ younesservices.php在第行11-15 10：46：58.744：json從服務器（526）：調用堆棧11-15 10：46：58.744：I /從服務器（526）讀取：#TimeMemoryFunctionLocation 11-15 10：46：58.744：I /從服務器（526）讀取：10.0006142200 {main} （.. \\ younesservices.php ： 0 11-15 10：46：58.744：I /從服務器讀取（526）：11-15 10：46：58.744：I /從服務器讀取（526）： {“名稱” ：“ Hagrid”，“ age”：“ 36”}

但我只讀變量

這： {“名稱”：“ Hagrid”，“年齡”：“ 36”}

Answer 1

使用此代碼。

public String getResult（String url）{

    Log.v(TAG, "Final Requsting URL is : :"+url);

    String line = "";
    String responseData = null;

    try {
        StringBuilder sb = new StringBuilder();
        String x = "";
        URL httpurl = new URL(url);
        URLConnection  tc= httpurl.openConnection();


        /*URLConnection tc = twitter.openConnection();
        HttpURLConnection httpConnection = (HttpURLConnection) tc;
        httpConnection.setRequestMethod("POST");*/
        //tc.setRe
        //tc.setDoOutput(false);

        BufferedReader in = new BufferedReader(new InputStreamReader(tc.getInputStream()));

        while ((line = in.readLine()) != null) {
            sb.append(line + "\n");
            x = sb.toString();
        }
        responseData = new String(x);
    }

   catch (FileNotFoundException e) {
       Log.v("NewWebHelper", "FileNotFoundException :");
        e.printStackTrace();
     }
    catch (IOException e) {
        Log.v("NewWebHelper", "IOException :");
        e.printStackTrace();
    }
  catch (Exception e) {
      Log.v("NewWebHelper", "Exception :");
        e.printStackTrace();
    }
    return responseData;
}