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How to use user input to open api JSON [duplicate]

This question already has answers here:
What arguments are passed into AsyncTask<arg1, arg2, arg3>?
(5 answers)
Closed 3 years ago.
I am working on an Android app in which I am making a weather app. The application opens api data from a JSON and displays this information. More specifically it takes the user input of a city or zip code and adds this info to the URL for the API and then executes the URL.
MainActivity.java
package com.shanehampcsci3660.weather;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
//import static com.shanehampcsci3660.weather.GetJsonData.*;
public class MainActivity extends AppCompatActivity
{
public static TextView tempTV, jsonTV;
public EditText cityORZipET;
private Button getWeather;
public String zip, cityOrZip;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tempTV = (TextView) findViewById(R.id.tempTV);
jsonTV = (TextView) findViewById(R.id.jsonFeedTV);
cityORZipET = (EditText) findViewById(R.id.cityORZipET);
getWeather = (Button) findViewById(R.id.getWeatherButton);
//cityOrZip = cityORZipET.getText().toString();
getWeather.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View view)
{
GetJsonData getJsonData = new GetJsonData();
//getJsonData.execute();
cityOrZip = cityORZipET.getText().toString();
getJsonData.execute("https://api.openweathermap.org/data/2.5/weather?q=" + cityOrZip +"&appid=x");
jsonTV.setText(cityOrZip);
/*if(cityOrZip.equals(""))
{
getJsonData.execute("https://api.openweathermap.org/data/2.5/weather?q=" + cityOrZip +"&appid=x");
}
else
{
zip = "30528";
getJsonData.execute("https://api.openweathermap.org/data/2.5/weather?q=" + zip + "&appid=x");
}*/
}
});
}
}
GetJsonData.java
package com.shanehampcsci3660.weather;
import android.os.AsyncTask;
import android.util.Log;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
public class GetJsonData extends AsyncTask<Void, Void, Void>
{
public String data= "", line = "", name = "";
double temp, minTemp, maxTemp;
#Override
protected Void doInBackground(Void... voids)
{
try
{
URL url = new URL("https://api.openweathermap.org/data/2.5/weather?q=30528&appid=id");
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
while(line != null)
{
line = bufferedReader.readLine();
data = data + line;
}
JSONObject jsonObject = new JSONObject(data);
JSONObject main = jsonObject.getJSONObject("main");
name = jsonObject.getString("name");
temp = main.getDouble("temp");
minTemp = main.getDouble("min_temp");
maxTemp = main.getDouble("max_temp");
/*JSONObject jsonObject = new JSONObject(result);
JSONObject jsonData = new JSONObject(jsonObject.getString("main"));
String weatherInfo = jsonObject.getString("weather");
JSONArray jsonArray = new JSONArray(weatherInfo);
String description, icon, iconURI;
for(int i = 0; i < jsonArray.length(); i++)
{
JSONObject jsonData1 = jsonArray.getJSONObject(i);
description = jsonData1.getString("description");
MainActivityController.description.setText(description);
icon = jsonData1.getString("icon");
iconURI = "http://openweathermap.org/img/w/" + icon + ".png";
Picasso.get().load(iconURI).into(MainActivityController.conditionImageView);
}*/
}
catch(MalformedURLException e)
{
e.printStackTrace();
}
catch(IOException e)
{
e.printStackTrace();
}
catch (JSONException e)
{
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void aVoid)
{
super.onPostExecute(aVoid);
//MainActivity.jsonTV.setText(data);
MainActivity.tempTV.setText("City:\t" + name + "\tTemp:\t" + temp);
Log.d("Json Feed", name + "Temp: " + temp);
}
public static void execute(String s) {
}
}
My issue is that no matter where I put...
if(cityOrZip.equals(""))
{
getJsonData.execute("https://api.openweathermap.org/data/2.5/weather?q=" + cityOrZip +"&appid=id");
}
else
{
zip = "30528";
getJsonData.execute("https://api.openweathermap.org/data/2.5/weather?q=" + zip + "&appid=id");
}
...It will only show the data of the default Url opened in GetJsonData.java. My question is what am I doing wrong and what should I correct in order to make my app work with the user input like it should.

you are calling an GetJsonData.execute with the url that contains the client data, but it has no code in it. Looking at your current code the zip that the client inputs does not get stored into the worker class.

This is because you always use the same URL in GetJsonData class. According to question What arguments are passed into AsyncTask? your class declaration should look like:
public class GetJsonData extends AsyncTask<String, Void, YourPojo> {
#Override
protected YourPojo doInBackground(String... urls)
{
try
{
URL url = new URL(urls[0]);
...
} catch (Exception e) {
handle(e);
}
}
}
where YourPojo is a class you need to create to store all properties you need to read from JSON payload:
class YourPojo {
private String data;
private String line;
private String name;
private double temp;
private double minTemp
private double maxTemp;
// getters, setters
}

Nothing shows on TextViews when parsing JSON(Randomy generated) from Url; (Java,Android)

I am writing an android app to get data from a database using JSON. PHP file is written to give random data from the database table. This file is working. This is my php.
<?php
define('HOST','localhost');
define('USER','*********');
define('PASS','*********');
define('DB','*********');
$con = mysqli_connect(HOST,USER,PASS,DB);
$sql="SELECT `id`, `questionSin`,`answer` FROM `tf_questions` ORDER BY RAND() LIMIT 1";
$res = mysqli_query($con,$sql);
$result = array();
while($row = mysqli_fetch_array($res)){
array_push($result,
array('id'=>$row[0],
'questionSin'=>$row[1],
'answer'=>$row[2]
));
}
echo json_encode(array("result"=>$result),JSON_UNESCAPED_UNICODE);
mysqli_close($con);
?>
When I get this JSON array.
{"result":[{"id":"13","questionSin":"KO2<\/sub>වල O පරමාණුවේ ඔක්සිකරණ අංකය -2 වේ.","answer":"T"}]}
(This is randomly generated)
So I wrote following code to show questionSin and answer as Question and Answer in two text views.
Following are my two .java files
MainActivity.java
package com.example.android.myjson;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class MainActivity extends AppCompatActivity {
TextView question_view;
TextView answertf_view;
Button Btngetdata;
//URL to get JSON Array
private static String url = "https://symbolistic-gyros.********.php";
//JSON Node Names
private static final String QUESTION_SIN = "questionSin";
private static final String ANSWER = "answer";
private static final String ARRAY = "results";
JSONArray user = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Btngetdata = (Button)findViewById(R.id.true_button);
Btngetdata.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
new JSONParse().execute();
}
});
}
private class JSONParse extends AsyncTask<String, String, JSONObject> {
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected JSONObject doInBackground(String... args) {
JSONParser jParser = new JSONParser();
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(url);
return json;
}
#Override
protected void onPostExecute(JSONObject json) {
try {
// Getting JSON Array
user = json.getJSONArray(ARRAY);
JSONObject c = user.getJSONObject(0);
// Storing JSON item in a Variable
String questionSin = c.getString(QUESTION_SIN);
String answertf1 = c.getString(ANSWER);
question_view = (TextView)findViewById(R.id.question);
answertf_view = (TextView)findViewById(R.id.answer);
//Set JSON Data in TextView
question_view.setText(questionSin);
answertf_view.setText(answertf1);
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
JSONParser.java
package com.example.android.myjson;
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
/**
* Created by Yomal Amarathunge on 8/9/2017.
*/
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
This is my xml file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="match_parent"
tools:context="com.example.android.myjson.MainActivity">
<TextView
android:id="#+id/question"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
/>
<TextView
android:id="#+id/answer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/true_button"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="0.27"
android:text="True" />
</LinearLayout>
</LinearLayout>
Android Studio do not show any error of my code. When I installed .apk in my phone, app runs, but nothing shows on textViews.
Please help me. Thank you.

Change
private static final String ARRAY = "results";
To
private static final String ARRAY = "result";
key mismatch: actual : "result"
you are providing wrong ie "results"

reading JSON data from php file in android application

i am just a beginner in developing android applications, i wanted to connect my application to a server so i could get data from MySQL. so i tried to make login part first but i have some problems. my code doesn't work for reading JSON.
my codes are as below:
LoginActivity(MainActivity) :
package ir.naserpour.sportclub;
import android.content.Context;
import android.graphics.Typeface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.UnsupportedEncodingException;
import uk.co.chrisjenx.calligraphy.CalligraphyContextWrapper;
public class LoginActivity extends AppCompatActivity {
String link;
String response;
//get values
String username,password;
#Override
protected void attachBaseContext (Context newBase){
super.attachBaseContext(CalligraphyContextWrapper.wrap(newBase));
}
#Override
protected void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
//define things
TextView menu = (TextView) findViewById(R.id.menu);
final EditText login_username = (EditText) findViewById(R.id.login_username);
final EditText login_password = (EditText) findViewById(R.id.login_password);
Button login_login = (Button) findViewById(R.id.login_login);
Button login_register = (Button)findViewById(R.id.login_register);
CheckBox rememberme = (CheckBox)findViewById(R.id.login_remeberme);
//set icon type face
Typeface fonticon = Typeface.createFromAsset(getAssets(), "fonts/icon.ttf");
menu.setTypeface(fonticon);
login_login.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
username = login_username.getText().toString();
password = login_password.getText().toString();
//check values
if (username.length() <1 || password.length() < 1) {
Toast.makeText(getApplicationContext(), "fields cannot be empty", Toast.LENGTH_SHORT).show();
} else {
//generate link
link = "http://localhost:8080/login.php?username="+username+"&password="+password;
login();
if(response=="true"){
Toast.makeText(getApplicationContext(), "true", Toast.LENGTH_SHORT).show();
}else if(response=="false"){
Toast.makeText(getApplicationContext(), "false", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(), "response", Toast.LENGTH_SHORT).show();
}
}
}
});
}
#Override
protected void onPause () {
super.onPause();
finish();
}
public String login() {
new JSONParse().execute();
return response;
}
public class JSONParse extends AsyncTask<String, String, JSONObject> {
#Override
public void onPreExecute() {
super.onPreExecute();
Toast.makeText(getApplicationContext(),"getting data ...",Toast.LENGTH_SHORT).show();
}
#Override
public JSONObject doInBackground(String... args) {
JSONParser jParser = new JSONParser();
// Getting JSON from URL
JSONObject json = jParser.getJSONFromUrl(link);
return json;
}
#Override
public void onPostExecute(JSONObject json) {
try {
JSONArray result = json.getJSONArray("result");
JSONObject c = result.getJSONObject(0);
try {
String res = new String(c.getString("response").getBytes("ISO-8859-1"), "UTF-8");
response = res;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
JSONParser.java:
package ir.naserpour.sportclub;
import android.util.Log;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
/**
* Created by Mohammad Naserpour on 9/22/2016.
*/
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url) {
// Making HTTP request
try {
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
HttpResponse httpResponse = httpClient.execute(httppost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
and also my login.php script:
<?php
define("HOST","localhost");
define("USERNAME","root");
define("PASSWORD","");
define("NAME","users");
$con = mysqli_connect(HOST,USERNAME,PASSWORD,NAME);
$username = $_GET["username"];
$password = $_GET["password"];
$sql = "SELECT * FROM userinfo WHERE username ='$username' AND password='$password'";
$check = mysqli_fetch_array(mysqli_query($con,$sql));
if(isset($check)){
echo '{"result":[{"response":"true"}]}';
}else{
echo '{"result":[{"response":"false"}]}';
}
mysqli_close($con);
?>
i would be so happy if i find out the problem. thank you.

see this tutorial :
its a full tutorial about login process using google volley

First : On device side, Use volley, its simple and easy to use
Second : On server, what is {"result":[{"response":"true"}]}
any problem with {"result":true} ??
Last but not the least : Did you use JSON before or this code is trial and error copy paste from some tutorials?

get list view with specific records from server based on email address sent from android

I have a table in the server and I want to retrieve specific records based on email address sent from android java code.
The email address is stored in global variable and I can get its value but I don't know how to send its value to the server and get the records.
my code retrieves all the records from the table
Please Help me to do it, I tried to do it for 3 days but with no solution
this is my PHP code :
<?php
$objConnect = mysql_connect("****","******","******");
$objDB = mysql_select_db("******");
$strSQL = "SELECT * FROM Appointment ";
$objQuery = mysql_query($strSQL);
$intNumField = mysql_num_fields($objQuery);
$resultArray = array();
while($obResult = mysql_fetch_array($objQuery))
{
$arrCol = array();
for($i=0;$i<$intNumField;$i++)
{
$arrCol[mysql_field_name($objQuery,$i)] = $obResult[$i];
}
array_push($resultArray,$arrCol);
}
mysql_close($objConnect);
echo json_encode($resultArray);
?>
this is my java code :
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.Bundle;
import android.os.StrictMode;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.DialogInterface;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class ServicesBMWGarageActivity extends Activity {
private ClipData myClip;
private ClipboardManager myClipboard;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.services_bmw_garage);
GlobalClass globalVariable = (GlobalClass) getApplicationContext();
// Get email from global/application context
final String Email = globalVariable.getEmail();
myClipboard = (ClipboardManager)getSystemService(CLIPBOARD_SERVICE);
// Permission StrictMode
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
// listView1
final ListView lisView1 = (ListView)findViewById(R.id.listView1);
String url = "http://ec2-54-148-64-28.us-west-2.compute.amazonaws.com/Codiad/workspace/BMWdatabase/MyAppointments.php";
try {
JSONArray data = new JSONArray(getJSONUrl(url));
final ArrayList<HashMap<String, String>> MyArrList = new ArrayList<HashMap<String, String>>();
HashMap<String, String> map;
for(int i = 0; i < data.length(); i++){
JSONObject c = data.getJSONObject(i);
map = new HashMap<String, String>();
map.put("A_ID", c.getString("A_ID"));
map.put("A_Model", c.getString("A_Model"));
map.put("A_Services", c.getString("A_Services"));
map.put("A_DATE", c.getString("A_DATE"));
MyArrList.add(map);
}
SimpleAdapter sAdap;
sAdap = new SimpleAdapter(ServicesBMWGarageActivity.this, MyArrList, R.layout.activity_column,
new String[] {"A_ID", "A_Model", "A_Services", "A_DATE"}, new int[] {R.id.ColMemberID, R.id.ColName, R.id.ColTel,R.id.Coldate });
lisView1.setAdapter(sAdap);
final AlertDialog.Builder viewDetail = new AlertDialog.Builder(this);
// OnClick Item
lisView1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> myAdapter, View myView,
int position, long mylng) {
String A_ID1 = MyArrList.get(position).get("A_ID")
.toString();
String Type1 = MyArrList.get(position).get("A_Model")
.toString();
String Model1 = MyArrList.get(position).get("A_Services")
.toString();
String Model2 = MyArrList.get(position).get("A_DATE")
.toString();
final String phoneNumber = MyArrList.get(position).get("A_ID")
.toString();
//String sMemberID = ((TextView) myView.findViewById(R.id.ColMemberID)).getText().toString();
// String sName = ((TextView) myView.findViewById(R.id.ColName)).getText().toString();
// String sTel = ((TextView) myView.findViewById(R.id.ColTel)).getText().toString();
viewDetail.setIcon(android.R.drawable.btn_star_big_on);
viewDetail.setTitle("Appointment Detail");
viewDetail.setMessage("ID : " + A_ID1 + "\n"
+ "Vehicle Model : " + Type1 + "\n" + "Service Type : " + Model1
+ "\n" + "Date : " + Model2);
viewDetail.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub
String text = phoneNumber;
myClip = ClipData.newPlainText("text", text);
myClipboard.setPrimaryClip(myClip);
Toast.makeText(getApplicationContext(), "Appointment ID Copied",
Toast.LENGTH_SHORT).show();
dialog.dismiss();
}
});
viewDetail.show();
}
});
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public String getJSONUrl(String url) {
StringBuilder str = new StringBuilder();
HttpClient client = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);
try {
HttpResponse response = client.execute(httpGet);
StatusLine statusLine = response.getStatusLine();
int statusCode = statusLine.getStatusCode();
if (statusCode == 200) { // Download OK
HttpEntity entity = response.getEntity();
InputStream content = entity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(content));
String line;
while ((line = reader.readLine()) != null) {
str.append(line);
}
} else {
Log.e("Log", "Failed to download results..");
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return str.toString();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_activity_home_page, menu);
return true;
}
}

I found the answer and the problem is solved
It was an easy solution
I just put my condition in the java code with no changes in the PHP code
the changes are :
try {
JSONArray data = new JSONArray(getJSONUrl(url));
final ArrayList<HashMap<String, String>> MyArrList = new ArrayList<HashMap<String, String>>();
HashMap<String, String> map;
for(int i = 0; i < data.length(); i++){
JSONObject c = data.getJSONObject(i);
map = new HashMap<String, String>();
map.put("V_ID", c.getString("V_ID"));
map.put("V_Type", c.getString("V_Type"));
map.put("V_Model", c.getString("V_Model"));
map.put("V_Year", c.getString("V_Year"));
map.put("V_Plate", c.getString("V_Plate"));
map.put("ImagePath", c.getString("ImagePath"));
map.put("Email", c.getString("Email"));
String email = c.getString("Email");
GlobalClass globalVariable = (GlobalClass) getApplicationContext();
// Get name and email from global/application context
final String Email = globalVariable.getEmail();
if(email.equals(Email))
MyArrList.add(map);
}

Can't Convert to JSONArray for showing in ListView

i'm try to convert json array from internet to listview. the php code in server work correctly and return the json string below.
the result json in logcat is :
11-09 20:47:04.170: I/AllNotes >> jSon >>(429): {"notes":{"3":{"note_subject":"dshjdsfjsdfsdhf","note_id":"4","note_date":"0000-00-00"},"2":{"note_subject":"dshjdsfjsdfsdhf","note_id":"3","note_date":"0000-00-00"},"1":{"note_subject":"dshjdsfjsdfsdhf","note_id":"2","note_date":"0000-00-00"},"0":{"note_subject":"dshjdsfjsdfsdhf","note_id":"1","note_date":"0000-00-00"},"7":{"note_subject":"dshjdsfjsdfsdhf","note_id":"8","note_date":"1391\/8\/19"},"6":{"note_subject":"dshjdsfjsdfsdhf","note_id":"7","note_date":""},"5":{"note_subject":"dshjdsfjsdfsdhf","note_id":"6","note_date":""},"4":{"note_subject":"dshjdsfjsdfsdhf","note_id":"5","note_date":""}},
"success":"1"}
my JSONParser class is :
package ir.mohammadi.android.nightly;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = null;
public JSONParser() {
}
public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) {
// Make HTTP connection
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
Log.i("Input stream >> ", is.toString());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "UTF-8"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
Log.i("JSON string builder >> ", json.toString());
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
try {
jObj = new JSONObject(json.substring(1, json.length()));
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
return jObj;
}
}
error is : at notes of type org.json.JSONObject cannot be converted to JSONArray
the code that show json in list view is :
package ir.mohammadi.android.nightly;
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class AllNotes extends ListActivity {
ProgressDialog pDialog;
ArrayList<HashMap<String, String>> noteList;
JSONArray notes = null;
JSONObject jSon = null;
private static String KEY_SUCCESS = "success";
private static String KEY_ERROR_MSG = "error_message";
private static String KEY_NOTE_ID = "note_id";
private static String KEY_NOTE_SUBJECT = "note_subject";
private static String KEY_NOTE_DATE = "note_date";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.note_list);
noteList = new ArrayList<HashMap<String, String>>();
new LoadAllNotes().execute();
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
String note_id = ((TextView) view
.findViewById(R.id.list_lbl_id)).getText().toString();
Intent i = new Intent(getApplicationContext(), NoteDetail.class);
i.putExtra("note_id", note_id);
startActivityForResult(i, 100);
}
});
}
public class LoadAllNotes extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AllNotes.this);
pDialog.setMessage("لطفا صبر کنید...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
protected String doInBackground(String... args) {
UserFunctions userFunctions = new UserFunctions();
jSon = userFunctions.getAllNotes("12");
Log.i("AllNotes >> jSon >>", jSon.toString());
return null;
}
protected void onPostExecute(String file_url) {
pDialog.dismiss();
try {
if (jSon.has(KEY_SUCCESS)) {
String success = jSon.getString(KEY_SUCCESS);
if (success.equals("1")) {
notes = jSon.getJSONArray("notes");
for (int i = 0; i < notes.length(); i++) {
JSONObject c = notes.getJSONObject(i);
String id = c.getString(KEY_NOTE_ID);
String subject = c.getString(KEY_NOTE_SUBJECT);
String date = c.getString(KEY_NOTE_DATE);
HashMap<String, String> map = new HashMap<String, String>();
map.put(KEY_NOTE_ID, id);
map.put(KEY_NOTE_SUBJECT, subject);
map.put(KEY_NOTE_DATE, date);
noteList.add(map);
}
}
} else {
finish();
Toast.makeText(getApplicationContext(),
jSon.getString(KEY_ERROR_MSG), Toast.LENGTH_SHORT)
.show();
Log.i("AllNotes >> No nightly >>", "...");
Intent i = new Intent(getApplicationContext(), login.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
runOnUiThread(new Runnable() {
public void run() {
ListAdapter adapter = new SimpleAdapter(AllNotes.this,
noteList, R.layout.list_item, new String[] {
KEY_NOTE_ID, KEY_NOTE_SUBJECT,
KEY_NOTE_DATE }, new int[] {
R.id.list_lbl_id, R.id.list_lbl_subject,
R.id.list_lbl_date });
setListAdapter(adapter);
}
});
}
}
}
and the php code is :
public function getNotesList($user_id)
{
$result = mysql_query("SELECT `id`, `note_subject`, `note_date` FROM `tbl_notes` WHERE `user_id` = '$user_id'");
if (mysql_num_rows($result) > 0) {
$response = array();
$response["success"] = "1";
$response["notes"] = array();
while ($row = mysql_fetch_array($result)) {
$note = array();
$note["note_id"] = $row["id"];
$note["note_subject"] = $row["note_subject"];
$note["note_date"] = $row["note_date"];
array_push($response["notes"], $note);
}
return $response;
}
}
and
if ($tag == 'getNotesList') {
$user_id = $_POST['user_id'];
$result = $db->getNotesList($user_id);
if ($result) {
error_log("Index getNotesList Json >>" . json_encode($result) . "\r\n", 3,
"Log.log");
echo json_encode($result, JSON_FORCE_OBJECT);
} else {
$response["error"] = "1";
$response["error_message"] = "no row";
echo json_encode($response, JSON_FORCE_OBJECT);
}
}
how can i fix this? thanks.

use
JSONObject notes = jSon.getJSONObject("notes");
instead of
JSONArray notes = jSon.getJSONArray("notes");`
Because your json String is collection of JsonOject's it's not contains any JsonArray.
you can use following json checker site before parsing it to known the structure of Json String
http://jsonviewer.stack.hu/