如何從json中使用排序響應android

Question

我發佈的Json對象數據在我的應用程序中使用排球庫，但我想從該請求獲取響應並根據響應更新UI，並在執行後臺進程時顯示progressdialog process.how我可以這樣做嗎，請告訴我。

這裏是我的代碼： -

public void postData() { 
    try { 
     getText();// get Input Text by the user 
     String json;// storing json object 

     JSONObject jsonObject = new JSONObject(); 
     jsonObject.put("agentCode", s_szMobileNumber); 
     jsonObject.put("pin", s_szOldPassword); 
     jsonObject.put("newpin", s_szNewPassword); 
     // 4. convert JSONObject to JSON to String 
     json = jsonObject.toString(); 
     System.out.println("Server Request:-" + json); 
     JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, CServerAPI.s_szChangePassUrl, jsonObject, new Response.Listener<JSONObject>() { 
      @Override 
      public void onResponse(JSONObject response) { 

      } 
     }, new Response.ErrorListener() { 
      @Override 
      public void onErrorResponse(VolleyError error) { 

      } 
     }); 

     RequestQueue requestQueue = Volley.newRequestQueue(this); 
     requestQueue.add(jsonObjectRequest); 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
} 

public void getText() {// getting text from editText..... 
    s_szMobileNumber = m_MobileEditText.getText().toString().trim();// get mobile number from edit text 
    s_szNewPassword = m_NewPassEditText.getText().toString().trim();// get new pasword from edit Text 
} 

public void getResponse() throws JSONException {// method regarding condition................. 
    if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Transaction Successful")) { 
     s_szResponseNewPassword = m_oResponseobject.getString("newpin");// getting new password response from server.... 
     CSnackBar.getInstance().showSnackBarSuccess(findViewById(R.id.mainLayout), "Password Changed Successfully", getApplicationContext()); 
     upDatePassword();// updating password in shared preference....... 

     new Handler().postDelayed(new Runnable() { 
      @Override 
      public void run() { 
       Intent login = new Intent(getApplicationContext(), CLoginScreen.class); 
       startActivity(login); 

      } 
     }, 3500); 


    } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Subscriber/Agent Not Found")) { 
     CSnackBar.getInstance().showSnackBarError(findViewById(R.id.mainLayout), "User not found", getApplicationContext()); 
    } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("New Pin Can Not Be Empty")) { 
     CSnackBar.getInstance().showSnackBarError(findViewById(R.id.mainLayout), "Enter valid password", getApplicationContext()); 
    } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Pin Can Not Be Empty")) { 
     CSnackBar.getInstance().showSnackBarError(findViewById(R.id.mainLayout), "Old pin not found", getApplicationContext()); 
    } else if (m_oResponseobject.getString("resultdescription").equalsIgnoreCase("Agentcode Can Not Be Empty")) { 
     CSnackBar.getInstance().showSnackBarError(findViewById(R.id.mainLayout), "Enter valid mobile number", getApplicationContext()); 
    } 
} 

public void upDatePassword() {// Update old password from new password in shared preference ...... 
    m_Preferences = getApplicationContext().getSharedPreferences("LoginData", Context.MODE_PRIVATE); 
    SharedPreferences.Editor editor = m_Preferences.edit(); 
    editor.putString("pin", s_szResponseNewPassword); 
    editor.apply(); 
} 

Answer 1

試試這個在您的onResponse

@Override 
public void onResponse(JSONObject response) { 
    Log.d("Response", response.toString()); 
    } 

這可能幫助你。

編輯1：

試試下面的代碼，

import android.app.ProgressDialog; 
import android.content.DialogInterface; 
import android.net.ConnectivityManager; 
import android.net.NetworkInfo; 
import android.os.Bundle; 
import android.support.v7.app.AlertDialog; 
import android.support.v7.app.AppCompatActivity; 

import android.view.View; 
import android.widget.Button; 
import android.widget.EditText; 
import com.android.volley.AuthFailureError; 
import com.android.volley.Request; 
import com.android.volley.RequestQueue; 
import com.android.volley.Response; 
import com.android.volley.VolleyError; 
import com.android.volley.toolbox.StringRequest; 
import com.android.volley.toolbox.Volley; 

import java.util.HashMap; 
import java.util.Map; 

import org.json.JSONException; 
import org.json.JSONObject; 

public class Login extends AppCompatActivity{ 

public static final String LOGIN_URL = "YOUR_URL"; 

ProgressDialog pDialog; 

public static final String KEY_USERNAME="username"; 
public static final String KEY_PASSWORD="password"; 

private EditText editTextUsername; 
private EditText editTextPassword; 
private Button buttonLogin; 

private String username; 
private String password; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.login); 

     editTextUsername = (EditText) findViewById(R.id.editTextUsername); 
     editTextPassword = (EditText) findViewById(R.id.editTextPassword); 

     buttonLogin = (Button) findViewById(R.id.buttonLogin); 

     buttonLogin.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 

       if(isNetworkAvailable()){ 
       userLogin(); 
       } 
       else 
       { 
        showMessageDialog("Error", "Check your Internet Connection..!"); 
       } 
      } 
     }); 
} 

private void userLogin() { 
    username = editTextUsername.getText().toString().trim(); 
    password = editTextPassword.getText().toString().trim(); 

    pDialog = new ProgressDialog(this); 
    pDialog.setMessage("Loading..."); 
    pDialog.show(); 

    StringRequest stringRequest = new StringRequest(Request.Method.POST, LOGIN_URL, 
      new Response.Listener<String>() { 
       @Override 
       public void onResponse(String response) { 

        try { 
         //JSONArray myJSON= new JSONArray(response); 

          JSONObject parentObject = new JSONObject(response); 
          JSONObject childObject = parentObject.getJSONObject("Tracking"); 

           String status = childObject.optString("status"); 
           String type = childObject.optString("type"); 

           //System.out.println("status : " + status); 
           //System.out.println("Type : " + type); 

           if(status.trim().equals("success")) 
           { 
            pDialog.hide(); 
            showMessageDialog("Login", type + " Login Successfully..!"); 
           } 
           else 
           { 
            pDialog.hide(); 
            showMessageDialog("Login", "No Users/Admin were Found..! "); 
           } 


        } catch (JSONException e) { 
         // TODO Auto-generated catch block 
         //e.printStackTrace(); 
         pDialog.hide(); 
         showMessageDialog("JSON Error", "Server Error..! Try after Some Time..!");//e.getMessage()); 
        } 

       } 
      }, 
      new Response.ErrorListener() { 
       @Override 
       public void onErrorResponse(VolleyError error) 
       { 
        pDialog.hide(); 
        showMessageDialog("Login", "Reponse => " + error.toString()); 

       } 
      }){ 
     @Override 
     protected Map<String, String> getParams() throws AuthFailureError { 
      Map<String,String> map = new HashMap<String,String>(); 
      map.put(KEY_USERNAME,username); 
      map.put(KEY_PASSWORD,password); 
      return map; 
     } 
    }; 

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

public void showMessageDialog(String title , String Message) 
{ 
    AlertDialog dialog = new AlertDialog.Builder(Login.this) 
    .setTitle(title) 
    .setMessage(Message) 
    .setPositiveButton("Ok", new DialogInterface.OnClickListener() { 

     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      // TODO Auto-generated method stub 
      dialog.dismiss(); 

     } 
    }) 

    .show(); 


} 

    private boolean isNetworkAvailable() { 
     ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE); 
     NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo(); 
     return activeNetworkInfo != null && activeNetworkInfo.isConnected(); 
    } 

}