Question

json看起来像这样：

[{"id":"1","name":"Mihai","email":"mihai@yahoo.com","password":"1234","phone":"765889345"},{"id":"2","name":"Robin","email":"robin@yahoo.com","password":"1234","phone":"765453434"}]

代码

// Json
    StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
            .detectAll()
            .penaltyLog()
            .penaltyDialog()
            .build());

    StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectAll()
            .penaltyLog()
            .build());
    StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
            .detectDiskReads()
            .detectDiskWrites()
            .detectNetwork() // or .detectAll() for all detectable problems
            .penaltyLog()
            .build());
    StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
            .detectLeakedSqlLiteObjects()
            .penaltyLog()
            .penaltyDeath()
            .build());


    TextView uid = (TextView) findViewById(R.id.titlu_anunt1);
    TextView name1 = (TextView) findViewById(R.id.descriere_anunt1);
    TextView email1 = (TextView) findViewById(R.id.telefon_anunt1);


    JSONObject json = null;
    String str = "";
    HttpResponse response;
    HttpClient myClient = new DefaultHttpClient();
    HttpPost myConnection = new HttpPost("http://appz.esy.es/get_user.php");

    try {
        response = myClient.execute(myConnection);
        str = EntityUtils.toString(response.getEntity(), "UTF-8");

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


    try {
        JSONArray jArray = new JSONArray(str);
        json = jArray.getJSONObject(0);


        uid.setText(json.getString("id"));
        name1.setText(json.getString("name"));
        email1.setText(json.getString("email"));


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

如何将所有对象添加到文本视图中？现在我只能在第一个textview中显示json中的一个对象，我想增加id。我想在textview中显示id1信息：名称，位置和其他内容1.之后我想在id2中显示名称和位置到textviews 2。

Answer 1

您可以使用排球库，它易于使用，您可以专注于您的应用，而不是如何获取数据。您可以在this tutorial之后将库添加到项目中，或者如果您使用的是AndroidStudio，则可以将其添加到您的gradle as seen here。

要发出请求，您只需要添加：

        //I think a StringRequest is more convenient in your case cause you can 
        //make a new JSONArray straight from the String
    StringRequest request = new StringRequest(url, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            //Here is where you process your data, you could call a method to parse your data 
            parseData(response);
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            //Here is where you handle the errors
        }
    });

    RequestQueue queue = Volley.newRequestQueue(Here_goes_a_Context_object);
    //This will send the request
    queue.add(request);

    public void parseData(String response) {

          try {

              //Your JSONArray doesn't have a name so you can't find it with the USER_TAG
              //You need to make your JSONObject a String and then make a new JSONArray with that String
              user = new JSONArray(response);

              //The rest of the code looks good to me
              ...
          }
      }

如何在Android上从url获取JSon数据？

1 个答案: