wie php (json) Antwort in Android zu parsen.?

Question

ich Json Antwort wie diese habe ..

{"Fullname":" Prasad","vault_no":"12745"}. 

Wie dies in android.This zu Zeichenfolge konvertieren ist meine Android-Klassendatei.

Register.class

package com.example.test; 

import android.app.Activity; 
import android.app.ProgressDialog; 
import android.content.Intent; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.text.TextUtils; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.Spinner; 
import android.widget.TextView; 
import android.widget.Toast; 

import org.json.JSONObject; 

import java.util.HashMap; 


public class Register extends Activity implements View.OnClickListener{ 


    private static final int[] CategoryCode = new int[]{0,1,2,3}; // array to save Salutation code 
    private static final String[] Category = new String[]{"Cartegory","Male","Female","Company"}; // array to show Salutation 

    private static final int[] SalutationCode = new int[]{0,1,2,3,4,5,6,7,8,9,0}; // array to save Salutation code 
    private static final String[] Salutation = new String[]{"Salutation","Mr","Ms","SME(small scale)", 
      "SU(start-up's)","SB(service based)","CA(charted accountant)","DR(doctor)", 
    "LC(large scale)","Others", "None"}; 

    private static final int[] CountryCode = new int[]{0,91}; // array to save Country code 
    private static final String[] Country = new String[]{"Country","India"}; // array to show Country name. 

    private static final int[] CityCode = new int[]{0,1}; // array to save City code 
    private static final String[] City = new String[]{"City","Bangalore"}; // array to show City list 

    private static final int[] StateCode = new int[]{0,1}; // array to save State code 
    private static final String[] State = new String[]{"State","Karnataka"}; // array to show State list 

    int selectedAreaCode; 
    private Spinner spin; 
    private Spinner spin0; 
    private Spinner spin1; 
    private Spinner spin2; 
    private Spinner spin3; 
    private EditText editTextFname; 
    private EditText editTextLname; 
    private EditText editTextDob; 
    private EditText editTextPob; 
    private EditText editTextMobile; 
    private EditText editTextEmail; 
    private EditText editTextPin; 
    private Button register; 
    private Button login; 

    private static final String REGISTER_URL = "http://oursite/insert-db(1).php"; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     getActionBar().setDisplayShowTitleEnabled(false); 
     setContentView(R.layout.activity_register_page); 

     spin = (Spinner)findViewById(R.id.spinner1); 
     spin0 = (Spinner)findViewById(R.id.spinner01); 
     spin1 = (Spinner)findViewById(R.id.spinner2); 
     spin2 = (Spinner)findViewById(R.id.spinner3); 
     spin3 = (Spinner)findViewById(R.id.spinner4); 
     editTextFname = (EditText) findViewById(R.id.editTextFname); 
     editTextLname = (EditText) findViewById(R.id.editTextLname); 
     editTextDob = (EditText)findViewById(R.id.editTextDob); 
     editTextPob = (EditText)findViewById(R.id.editTextPob); 
     editTextMobile = (EditText) findViewById(R.id.editTextMobile); 
     editTextEmail = (EditText)findViewById(R.id.editTextEmail); 
     editTextPin = (EditText) findViewById(R.id.editTextPin); 

     register = (Button) findViewById(R.id.button); 
     login = (Button) findViewById(R.id.button2); 
     register.setOnClickListener(this); 

     login.setOnClickListener(this); 

     ArrayAdapter<String> adpt_area = new ArrayAdapter<String>(this, 
       android.R.layout.simple_spinner_item, Category); 
     adpt_area.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     spin.setAdapter(adpt_area); 

     ArrayAdapter<String> cat = new ArrayAdapter<String>(this, 
       android.R.layout.simple_spinner_item, Salutation); 
     cat.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     spin0.setAdapter(cat); 

     ArrayAdapter<String> adpt_country = new ArrayAdapter<String>(this, 
       android.R.layout.simple_spinner_item, Country); 
     adpt_country.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     spin1.setAdapter(adpt_country); 

     ArrayAdapter<String> adpt_city = new ArrayAdapter<String>(this, 
       android.R.layout.simple_spinner_item, City); 
     adpt_city.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     spin2.setAdapter(adpt_city); 

     ArrayAdapter<String> adpt_state = new ArrayAdapter<String>(this, 
       android.R.layout.simple_spinner_item, State); 
     adpt_state.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     spin3.setAdapter(adpt_state); 


    } 

    @Override 
    public void onClick(View v) { 
     if(v == register){ 
      registerUser(); 
     } 
     if(v == login){ 
      startActivity(new Intent(this,LoginPage.class)); 
     } 
    } 

    private void registerUser() { 


     String fname = editTextFname.getText().toString(); 

     if(TextUtils.isEmpty(fname)) { 
      editTextFname.setError("please enter first name"); 
      return; 
     } 

     String lname = editTextLname.getText().toString(); 

     if(TextUtils.isEmpty(lname)) { 
      editTextLname.setError("please enter last name"); 
      return; 
     } 

     String dob = editTextDob.getText().toString(); 

     if(TextUtils.isEmpty(dob)) { 
      editTextDob.setError("enter date of birth"); 
      return; 
     } 

     String pob = editTextPob.getText().toString(); 

     if(TextUtils.isEmpty(pob)) { 
      editTextPob.setError("enter the place of birth"); 
      return; 
     } 

     String mobile = editTextMobile.getText().toString(); 

     if(TextUtils.isEmpty(mobile)) { 
      editTextMobile.setError("please enter mobile no"); 
      return; 
     } 

     String email = editTextEmail.getText().toString(); 
     if(TextUtils.isEmpty(email)) { 
      editTextEmail.setError("please enter the email id"); 
      return; 

     } 

     String pin = editTextPin.getText().toString(); 

     if(TextUtils.isEmpty(pin)) { 
      editTextPin.setError("please enter pin no"); 
      return; 
     } 

     int selectedPosition = spin.getSelectedItemPosition(); 
     // get area code based on value selected in spinner 
     String category = String.valueOf(CategoryCode[selectedPosition]); 

     int selectedPosition0 = spin0.getSelectedItemPosition(); 
     // get area code based on value selected in spinner 
     String salutation = String.valueOf(SalutationCode[selectedPosition0]); 

     int selectedPosition1 = spin1.getSelectedItemPosition(); 
     // get area code based on value selected in spinner 
     String country = String.valueOf(CountryCode[selectedPosition1]); 

     int selectedPosition2 = spin2.getSelectedItemPosition(); 
     // get area code based on value selected in spinner 
     String state = String.valueOf(StateCode[selectedPosition2]); 

     int selectedPosition3 = spin3.getSelectedItemPosition(); 
     // get area code based on value selected in spinner 
     String city = String.valueOf(CityCode[selectedPosition3]); 


     register(salutation,category,fname,lname,dob,pob,mobile,email,country,state,city,pin); 
    } 

    private void register(String salutation, String category, String fname, String lname,String dob,String pob,String mobile, String email,String country, String state, String city, String pin) { 
     class RegisterUser extends AsyncTask<String, Void, String>{ 
      ProgressDialog loading; 
      //RegisterUserClass ruc = new RegisterUserClass(); 
      RequestHandler ruc = new RequestHandler(); 

      @Override 
      protected void onPreExecute() { 
       super.onPreExecute(); 
       loading = ProgressDialog.show(Register.this, "Please Wait",null, true, true); 
      } 

      @Override 
      protected void onPostExecute(String s) { 
       super.onPostExecute(s); 
       loading.dismiss(); 
       Toast.makeText(getApplicationContext(),"Successfully Registered..!!",Toast.LENGTH_LONG).show(); 
       editTextFname.setText(""); 
       editTextLname.setText(""); 
       editTextDob.setText(""); 
       editTextPob.setText(""); 
       editTextMobile.setText(""); 
       editTextEmail.setText(""); 
       editTextPin.setText(""); 

       Intent i = new Intent(Register.this,UserProfile.class); 
       i.putExtra("s", s); 
       startActivity(i); 
      } 

      @Override 
      protected String doInBackground(String... params) { 

       HashMap<String, String> data = new HashMap<String,String>(); 
       data.put("salutation",params[0]); 
       data.put("category",params[1]); 
       data.put("fname",params[2]); 
       data.put("lname",params[3]); 
       data.put("dob",params[4]); 
       data.put("pob",params[5]); 
       data.put("mobile",params[6]); 
       data.put("email", params[7]); 
       data.put("country",params[8]); 
       data.put("state",params[9]); 
       data.put("city",params[10]); 
       data.put("pin",params[11]); 


       String result = ruc.sendPostRequest(REGISTER_URL,data); 

       return result; 
      } 
     } 

     RegisterUser ru = new RegisterUser(); 
     ru.execute(salutation,category,fname,lname,dob,pob,mobile,email,country,state,city,pin); 
    } 
} 

Der String "s" in OnPostExecute (String s) die json value..how halten es Zeichenfolge zu konvertieren und es zur nächsten Seite übergeben .

RequestHandler.class

package com.example.test; 

import java.io.BufferedReader; 
import java.io.BufferedWriter; 
import java.io.InputStreamReader; 
import java.io.OutputStream; 
import java.io.OutputStreamWriter; 
import java.io.UnsupportedEncodingException; 
import java.net.HttpURLConnection; 
import java.net.URL; 
import java.net.URLEncoder; 
import java.util.HashMap; 
import java.util.Map; 

import javax.net.ssl.HttpsURLConnection; 

public class RequestHandler { 

    public String sendPostRequest(String requestURL, 
            HashMap<String, String> postDataParams) { 

     URL url; 

     StringBuilder sb = new StringBuilder(); 
     try { 
      url = new URL(requestURL); 

      HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 
      conn.setReadTimeout(15000); 
      conn.setConnectTimeout(15000); 
      conn.setRequestMethod("POST"); 
      conn.setDoInput(true); 
      conn.setDoOutput(true); 


      OutputStream os = conn.getOutputStream(); 
      BufferedWriter writer = new BufferedWriter(
        new OutputStreamWriter(os, "UTF-8")); 
      writer.write(getPostDataString(postDataParams)); 

      writer.flush(); 
      writer.close(); 
      os.close(); 
      int responseCode = conn.getResponseCode(); 

      if (responseCode == HttpsURLConnection.HTTP_OK) { 
       BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream())); 
       sb = new StringBuilder(); 
       String response; 
       while ((response = br.readLine()) != null){ 
        sb.append(response); 
       } 
      } 

     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
     return sb.toString(); 
    } 

    private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException { 
     StringBuilder result = new StringBuilder(); 
     boolean first = true; 
     for (Map.Entry<String, String> entry : params.entrySet()) { 
      if (first) 
       first = false; 
      else 
       result.append("&"); 

      result.append(URLEncoder.encode(entry.getKey(), "UTF-8")); 
      result.append("="); 
      result.append(URLEncoder.encode(entry.getValue(), "UTF-8")); 
     } 

     return result.toString(); 
    } 
} 

Answer 1

Erstellen Sie ein DTO-Klasse wie unten

public class JsonResponseFromserver { 

    @SerializedName("Fullname") 
    public boolean fullname; 

    @SerializedName("vault_no") 
    public String vault_no; 
} 

Ändern Sie Ihre AsynTask An:

class RegisterUser extends AsyncTask<String, Integer, JsonResponseFromserver>{ 
      ProgressDialog loading; 
      //RegisterUserClass ruc = new RegisterUserClass(); 
      RequestHandler ruc = new RequestHandler(); 

      @Override 
      protected void onPreExecute() { 
       super.onPreExecute(); 
       loading = ProgressDialog.show(Register.this, "Please Wait",null, true, true); 
      } 

      @Override 
      protected void onPostExecute(JsonResponseFromserver s) { 
       super.onPostExecute(s); 
       loading.dismiss(); 
       Toast.makeText(getApplicationContext(),"Successfully Registered..!!",Toast.LENGTH_LONG).show(); 
       editTextFname.setText(""); 
       editTextLname.setText(""); 
       editTextDob.setText(""); 
       editTextPob.setText(""); 
       editTextMobile.setText(""); 
       editTextEmail.setText(""); 
       editTextPin.setText(""); 

       Intent i = new Intent(Register.this,UserProfile.class); 
       i.putExtra("s", s.fullname); 
       startActivity(i); 
      } 

      @Override 
      protected JsonResponseFromserver doInBackground(String... params) { 

       HashMap<String, String> data = new HashMap<String,String>(); 
       data.put("salutation",params[0]); 
       data.put("category",params[1]); 
       data.put("fname",params[2]); 
       data.put("lname",params[3]); 
       data.put("dob",params[4]); 
       data.put("pob",params[5]); 
       data.put("mobile",params[6]); 
       data.put("email", params[7]); 
       data.put("country",params[8]); 
       data.put("state",params[9]); 
       data.put("city",params[10]); 
       data.put("pin",params[11]); 


       JsonResponseFromserver result = ruc.sendPostRequest(REGISTER_URL,data); 

       return result; 
      } 
     } 

Und ..

if (responseCode == HttpsURLConnection.HTTP_OK) { 
       BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream())); 
       sb = new StringBuilder(); 
       String response; 
       while ((response = br.readLine()) != null){ 
        sb.append(response); 
       } 
      } 

     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
     return new Gson().fromJson(sb.toString(),JsonResponseFromserver.class); 
    } 

Answer 2

Sie können für diese Verwendung des eingebauten JSONObject machen.

JSONObject jsonObject = new JSONObject(s); 
String fullName = jsonObject.getString("Fullname");