I want to get response after post data but it fails. I want to create a login system, I have successfully submited data to php file, everything is working fine now I want to get response from same function but I'm unable to know where the issue is.
Here is the Java function:
public class PostDataGetRes extends AsyncTask<String, String, String> {
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected String doInBackground(String... strings) {
try {
postRData();
} catch (NullPointerException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String lenghtOfFile) {
// do stuff after posting data
}
}
public void postRData() {
String result = "";
InputStream isr = null;
final String email = editEmail.getText().toString();
final String pass = editPass.getText().toString();
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://website.com/appservice.php");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", email));
nameValuePairs.add(new BasicNameValuePair("stringdata", pass));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
resultView.setText("Inserted");
HttpEntity entity = response.getEntity();
isr = entity.getContent();
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(isr,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
isr.close();
result=sb.toString();
}
catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
//parse json data
try {
String s = "";
JSONArray jArray = new JSONArray(result);
for(int i=0; i<jArray.length();i++){
JSONObject json = jArray.getJSONObject(i);
s = s +
"Name : "+json.getString("first_name")+"\n\n";
//"User ID : "+json.getInt("user_id")+"\n"+
//"Name : "+json.getString("first_name")+"\n"+
//"Email : "+json.getString("email")+"\n\n";
}
resultView.setText(s);
} catch (Exception e) {
// TODO: handle exception
Log.e("log_tag", "Error Parsing Data "+e.toString());
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
resultView.setText("Done");
}
And here is php code:
if($id){
$query = mysql_query("SELECT first_name FROM users where email = '$id' ");
while($row=mysql_fetch_assoc($query)){
$selectedData[]=$row;
}
print(json_encode($selectedData));
}
Please help me I have tried so far but could not achieve any results. Please help me how can I get response from php file after query execution.
At first be sure you get correct JSON object from your website - try printing it as Toast.makeText(). As far the web browsers keep the html comments away, android gets it in response.
AsyncTask objects and classes aren't designed to be made the way u provided and also you can't make any UI operations in doInBackground(). AsyncTask is made in a way to not to block GUI.
Here is a not much different example how it uses methods you have in AsyncTask class:
class Logging extends AsyncTask<String,String,Void>{
JSONObject json=null;
String output="";
String log=StringCheck.buildSpaces(login.getText().toString());
String pas=StringCheck.buildSpaces(password.getText().toString());
String url="http://www.mastah.esy.es/webservice/login.php?login="+log+"&pass="+pas;
protected void onPreExecute() {
Toast.makeText(getApplicationContext(), "Operation pending, please wait", Toast.LENGTH_SHORT).show();
}
#Override
protected Void doInBackground(String... params) {
HttpClient client = new DefaultHttpClient();
HttpGet request = new HttpGet(url);
request.addHeader("User-Agent", "User-Agent");
HttpResponse response;
try {
response = client.execute(request);
BufferedReader br = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
String line="";
StringBuilder result = new StringBuilder();
while ((line = br.readLine()) != null) {
result.append(line);
}
output=result.toString();
} catch (ClientProtocolException e) {
Toast.makeText(getApplicationContext(), "Connection problems", Toast.LENGTH_LONG).show();
} catch (IOException e) {
Toast.makeText(getApplicationContext(), "Conversion problems", Toast.LENGTH_LONG).show();
}
return null;
}
#Override
protected void onPostExecute(Void w) {
try {
json = new JSONObject(output);
if(json.getInt("err")==1){
Toast.makeText(getApplicationContext(), json.getString("msg"), Toast.LENGTH_LONG).show();
}else{
String id_user="-1";
Toast.makeText(getApplicationContext(), json.getString("msg"), Toast.LENGTH_LONG).show();
JSONArray arr = json.getJSONArray("data");
for(int i =0;i<arr.length();i++){
JSONObject o = arr.getJSONObject(i);
id_user = o.getString("id_user");
}
User.getInstance().setName(log);
User.getInstance().setId(Integer.valueOf(id_user));
Intent i = new Intent(getApplicationContext(),Discover.class);
startActivity(i);
}
} catch (JSONException e) {
}
super.onPostExecute(w);
}
}
PHP file content:
$data = array(
'err' => 0,
'msg' => "",
'data' => array(),
);
$mysqli = new MySQLi($dbhost,$dbuser,$dbpass,$dbname);
if($mysqli->connect_errno){
$data['err'] = 1;
$data['msg'] = "Brak polaczenia z baza";
exit(json_encode($data));
}
if(isset($_GET['login']) && isset($_GET['pass'])){
$mysqli->query("SET CHARACTER SET 'utf8';");
$query = $mysqli->query("SELECT banned.id_user FROM banned JOIN user ON user.id_user = banned.id_user WHERE user.login ='{$_GET['login']}' LIMIT 1;");
if($query->num_rows){
$data['err']=1;
$data['msg']="User banned";
exit(json_encode($data));
}else{
$query = $mysqli->query("SELECT login FROM user WHERE login='{$_GET['login']}' LIMIT 1;");
if($query->num_rows){
$query = $mysqli->query("SELECT pass FROM user WHERE pass ='{$_GET['pass']}' LIMIT 1;");
if($query->num_rows){
$data['msg']="Logged IN!";
$query = $mysqli->query("SELECT id_user FROM user WHERE login='{$_GET['login']}' LIMIT 1;");
$data['data'][]=$query->fetch_assoc();
exit(json_encode($data));
}else{
$data['err']=1;
$data['msg']="Wrong login credentials.";
exit(json_encode($data));
}
}else{
$data['err']=1;
$data['msg']="This login doesn't exist.";
exit(json_encode($data));
}
}
}else{
$data['err']=1;
$data['msg']="Wrong login credentials";
exit(json_encode($data));
}
I have created there small dictionary $data for my app. I used its err key as a flag to know if any error appeared, msg to inform user about operation results and data to send JSON objects.
Thing you would want to do with if(response == true) if it had exist is similar to construction i used in my onPostExecute(Void w) method in AsyncTask:
if(json.getInt("err")==1){
//something went wrong
}else{
//everything is okay, get JSON, inform user, start new Activity
}
Also here is the way I used $data['data'] to get JSON response:
if($query->num_rows){
while($res=$query->fetch_assoc()){
$data['data'][]=$res;
}
exit(json_encode($data));
}
Related
I need to send a string obtained from EditText in android to the PHP to be used as an id to query the database. So, I got the string from EditText as follows:
childIDVal = childID.getText().toString();
Toast.makeText(getApplicationContext(),childIDVal,Toast.LENGTH_LONG).show();
// To do : transfer data to PHP
transferToPhp(childIDVal);
So, what should my transferToPhp() contain? And also the php code is:
<?php
if( isset($_POST["ChildID"]) ) {
$data = json_decode($_POST["ChildID"]);
$data->msg = strrev($data->msg);
echo json_encode($data);
}
Is it okay? I am a newbie to both android and Php, so i need some help right now. Thanks!
I' m offering you to use AsyncTask which reaches PHP file existing in your server using HttpClient:
/*Sending data to PHP and receives success result*/
private class AsyncDataClass extends AsyncTask<String, Void, String> {
#Override
protected String doInBackground(String... params) {
HttpParams httpParameters = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParameters, 5000);
HttpConnectionParams.setSoTimeout(httpParameters, 5000);
HttpClient httpClient = new DefaultHttpClient(httpParameters);
HttpPost httpPost = new HttpPost(params[0]);
String jsonResults = "";
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
// SENDING PARAMETERS WITH GIVEN NAMES
nameValuePairs.add(new BasicNameValuePair("paramName_1", params[1]));
nameValuePairs.add(new BasicNameValuePair("paramName_2", params[2]));
// ...
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpClient.execute(httpPost);
jsonResults = inputStreamToString(response.getEntity().getContent()).toString();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return jsonResults;
}
// DO SOMETHING BEFORE PHP RESPONSE
#Override
protected void onPreExecute() {
super.onPreExecute();
}
// DO SOMETHING AFTER PHP RESPONSE
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if(result.equals("") || result.equals(null)){
return;
}
// Json response from PHP
String jsonResult = returnParsedJsonObject(result);
// i.e.
if (jsonResult.equals("some_response") {
// do something
}
}
// READING ANSWER FROM PHP
private StringBuilder inputStreamToString(InputStream is) {
String rLine = "";
StringBuilder answer = new StringBuilder();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
try {
while ((rLine = br.readLine()) != null) {
answer.append(rLine);
}
} catch (IOException e) {
e.printStackTrace();
}
return answer;
}
}
// GET ALL RETURNED VALUES FROM PHP
private String returnParsedJsonObject(String result){
JSONObject resultObject;
String returnedResult = "0";
try {
resultObject = new JSONObject(result);
returnedResult = resultObject.getString("response");
String value1 = resultObject.getString("value1");
String value2 = resultObject.getString("value2");
//...
// do something with retrieved values
} catch (JSONException e) {
e.printStackTrace();
}
return returnedResult;
}
To send some parameters use:
AsyncDataClass asyncRequestObject = new AsyncDataClass();
asyncRequestObject.execute("server_url", param1, param2,...);
Hope it helps you.
I am using an AsyncTask for a network call. If successful, it should return a JSON Array, and so far it works well on the device I test(Google nexus 5).
But on a Motorola device, it does not work. In the sense, it is not even sending a request to the server.
Here is the code :
private class SimpleTask extends AsyncTask<String, Void, String> {
ProgressDialog dialog;
#Override
protected void onPreExecute()
{
dialog = new ProgressDialog(MainActivity.this,ProgressDialog.STYLE_SPINNER);
dialog.setMessage("Loading Engine");
dialog.show();
}
protected String doInBackground(String... urls) {
String result = "";
try {
//HttpGet httpGet = new HttpGet(urls[0]);
HttpPost httpPost = new HttpPost(urls[0]);
HttpClient client = new DefaultHttpClient();
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("number",details));
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = client.execute(httpPost);
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 200) {
InputStream inputStream = response.getEntity().getContent();
BufferedReader reader = new BufferedReader
(new InputStreamReader(inputStream));
String line;
while ((line = reader.readLine()) != null) {
result += line;
}
}
} catch (ClientProtocolException e) {
} catch (IOException e) {
}
//Log.w("PREMIERE::::",result);
return result;
}
protected void onPostExecute(String jsonString) {
//dialog.dismiss();
try {
if ((this.dialog != null) && this.dialog.isShowing()) {
this.dialog.dismiss();
}
} catch (final IllegalArgumentException e) {
// Handle or log or ignore
} catch (final Exception e) {
// Handle or log or ignore
} finally {
this.dialog = null;
}
showData(jsonString);
}
}
private void showData(String jsonString)
{
// try
// {
Log.w("VALS:",""+jsonString);
Gson gson = new Gson();
JsonParser parser = new JsonParser();
JsonArray jArray = parser.parse(jsonString).getAsJsonArray();
SharedPreferences pref = getSharedPreferences("ActivitySession", Context.MODE_PRIVATE);
for(JsonElement obj : jArray )
{
MainPojo cse = gson.fromJson( obj , MainPojo.class);
uid.add(cse);
}
if(!uid.isEmpty())
{
new SimpleTask2().execute(URL2);
}
else
{
Snackbar.make(this.findViewById(android.R.id.content), "Invalid Credentials", Snackbar.LENGTH_LONG).show();
}
/*
}
catch (Exception e){
Snackbar.make(this.findViewById(android.R.id.content), "Check data connection", Snackbar.LENGTH_LONG).show();
e.printStackTrace();
}*/
}
And I purposefully, did not catch exception, and traced the bug via Crashlytics. The bug occurs on this line.
JsonArray jArray = parser.parse(jsonString).getAsJsonArray();
which says :
Fatal Exception: java.lang.IllegalStateException: This is not a JSON
Array.
Which I believes also occurs when the response is empty, and since I can't also trace a request in server, I believe this is because No request is being sent.(Correct me if wrong).
So, my question is : Am I missing something | or is there anything wrong in the way I defined AsyncTask?
EDIT 1
PS: I am using an HTTPS URL in this AsyncTask
In Crashalitics you can log debug messages and stack traces from exceptions that were caught. So the answer for you is to proper collect this information, and then the issue will be clear
// catch everythin n log everything
} catch (ClientProtocolException e) {
Crashlytics.logException(e);
} catch (IOException e) {
Crashlytics.logException(e);
}
also put log messages before the possible crash
Crashlytics.log("Here is the async task that keeps giving me headache");
I am trying to insert data from android to MySQL but it does not show any error in logcat but displays the json message in the app.
Here is my PHP script.
<?php
/*
* Following code will create a new product row
* All product details are read from HTTP Post Request
*/
require("config.inc.php");
// array for JSON response
$response = array();
// check for required fields
if (isset($_POST['userName']) && isset($_POST['userContact']) && isset($_POST['userAddress']) && isset($_POST['userStore']) && isset($_POST['userRequest'])) {
$userName = $_POST['userName'];
$userContact = $_POST['userContact'];
$userAddress = $_POST['userAddress'];
$userStore = $_POST['userStore'];
$userRequest = $_POST['userRequest'];
// mysql inserting a new row
$result = mysql_query("INSERT INTO userrequests(userName, contactNumber, userAddress, storeList, requestBody) VALUES('$userName', '$userContact', '$userAddress', '$userStore', '$userRequest')");
// check if row inserted or not
if ($result) {
// successfully inserted into database
$response["success"] = 1;
$response["message"] = "Product successfully created.";
// echoing JSON response
echo json_encode($response);
} else {
// failed to insert row
$response["success"] = 0;
$response["message"] = "IsitdispllayingthusOops! An error occurred.";
// echoing JSON response
echo json_encode($response);
}
} else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>
Here is my JSONParser.java
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getJSONFromUrl(final String url) {
// Making HTTP request
try {
// Construct the client and the HTTP request.
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
// Execute the POST request and store the response locally.
HttpResponse httpResponse = httpClient.execute(httpPost);
// Extract data from the response.
HttpEntity httpEntity = httpResponse.getEntity();
// Open an inputStream with the data content.
is = httpEntity.getContent();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
// Create a BufferedReader to parse through the inputStream.
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "utf-8"), 8);
// Declare a string builder to help with the parsing.
StringBuilder sb = new StringBuilder();
// Declare a string to store the JSON object data in string form.
String line = null;
// Build the string until null.
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
Log.i("log_tag","Line reads: " + line);
}
// Close the input stream.
is.close();
// Convert the string builder data to an actual string.
json = sb.toString();
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// Try to 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 the JSON Object.
return jObj;
}
// function get json from url
// by making HTTP POST or GET mehtod
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
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();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
HttpResponse httpResponse = httpClient.execute(httpGet);
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, "utf-8"), 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;
}
}
Here is my MainActivity.java
public class MainActivity extends ActionBarActivity implements View.OnClickListener {
private EditText userName, userContact, userAddress, userRequest;
private Spinner userStore;
private Button mRegister;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
//php login script
//localhost :
//testing on your device
//put your local ip instead, on windows, run CMD > ipconfig
//or in mac's terminal type ifconfig and look for the ip under en0 or en1
// private static final String LOGIN_URL = "http://xxx.xxx.x.x:1234/webservice/register.php";
//testing on Emulator:
private static final String LOGIN_URL = "http://10.0.2.2/callarocket/register.php";
//testing from a real server:
//private static final String LOGIN_URL = "http://www.yourdomain.com/webservice/register.php";
//ids
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Spinner dropdown = (Spinner)findViewById(R.id.StoreSpinner);
String[] items = new String[]{"NZ Mamak", "Indo Shop", "NZ Supermarket"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, items);
dropdown.setAdapter(adapter);
userName = (EditText)findViewById(R.id.EditName);
userContact = (EditText)findViewById(R.id.EditContact);
userAddress = (EditText)findViewById(R.id.EditAddress);
userStore = (Spinner)findViewById(R.id.StoreSpinner);
userRequest = (EditText)findViewById(R.id.EditRequest);
mRegister = (Button)findViewById(R.id.SubmitButton);
mRegister.setOnClickListener(this);
}
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
new CreateUser().execute();
}
class CreateUser extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
boolean failure = false;
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Creating Request...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected String doInBackground(String... args) {
// TODO Auto-generated method stub
// Check for success tag
int success;
String username = userName.getText().toString();
String usercontact = userContact.getText().toString();
String useraddress = userAddress.getText().toString();
String userstore = userStore.getSelectedItem().toString();
String userrequest = userRequest.getText().toString();
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("userName", username));
params.add(new BasicNameValuePair("userContact", usercontact));
params.add(new BasicNameValuePair("userAddress", useraddress));
params.add(new BasicNameValuePair("userStore", userstore));
params.add(new BasicNameValuePair("userRequest", userrequest));
Log.d("request!", "starting");
//Posting user data to script
JSONObject json = jsonParser.makeHttpRequest(
LOGIN_URL, "POST", params);
// full json response
Log.d("Login attempt", json.toString());
// json success element
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
Log.d("User Created!", json.toString());
finish();
return json.getString(TAG_MESSAGE);
}else{
Log.d("Login Failure!", json.getString(TAG_MESSAGE));
return json.getString(TAG_MESSAGE);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (file_url != null){
Toast.makeText(MainActivity.this, file_url, Toast.LENGTH_LONG).show();
}
}
}
}
And the error I am getting inside the emulator is this json message in my php script
$response["message"] = "IsitdispllayingthusOops! An error occurred.";
I couldn't find the reason why new row cannot be inserted into MySQL.
POST can not be used by external applications. You have to use GET instead.
I have an android app that I am programming to post an array of data to a php file in local server. The data is in the format as bellow.
Name1->Quantity1
Name2->Qunatity2
I am trying to send it as json array but the problem is that whenever I am sending the data it shows that it is successful in posting that data. However i am not able to see any change of database that was suppose to be as a result of data that was sent form the android app. I will be thankful if someone guides or solves this problem of mine. please help me in this.
Bellow are the classes i am using to send and receive data
This is the class which is sending the data
public class Thirdscreen extends Activity {
private static String url = "http://10.0.2.2/bootstrap-dist/postingdata.php";
public ArrayList<QantityModelProduct> quantitymodel=new ArrayList<QantityModelProduct>();
// Progress Dialog
private ProgressDialog pDialog;
// Json parser object
JSONParser jsonParser = new JSONParser();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.thirdscreen);
QantityModelProduct qmp;
TextView showCartContent = (TextView) findViewById(R.id.showCart);
TextView showCarttotal = (TextView) findViewById(R.id.showtotal);
Button btn = (Button) findViewById(R.id.subtractQuantity);
final Controller aController = (Controller) getApplicationContext();
int cartSize = aController.getCart().getCartSize();
String showString = "";
int total = 0;
for (int i = 0; i < cartSize; i++) {
String pName = aController.getCart().getProducts(i)
.getProductName();
int pPrice = aController.getCart().getProducts(i).getProductPrice();
int quantity = aController.getCart().getProducts(i)
.getProductQuantity();
int dataProQuantityStore = aController.getCart()
.getProducts(i).getDatabaseProductQuantity();
String pDisc = aController.getCart().getProducts(i)
.getProductDesc();
total = total + (pPrice * quantity);
showString += "\n\nProduct Name : " + pName + "\n" + "Price : "
+ pPrice + "\t" + "Quantity: " + quantity + "\n"
+ "Discription : " + pDisc + ""
+ "\n -----------------------------------";
//databaseQuantity-Current quantity
int finalVal = dataProQuantityStore - quantity;
String finalstringValue=""+finalVal;
qmp=new QantityModelProduct(pName,finalstringValue);
quantitymodel.add(qmp);
}
showCarttotal.setText("Your Total is: " + total + "Tk");
showCartContent.setText(showString);
final int productSize=quantitymodel.size();
Toast.makeText(getApplicationContext(),"Array size: "+productSize, Toast.LENGTH_SHORT).show();
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
new getQuantity().execute();
}
});
}
class getQuantity extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Thirdscreen.this);
pDialog.setMessage("Processing your request..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
#Override
protected String doInBackground(String... params) {
JSONArray jsonArray = new JSONArray();
for (int i=0; i < quantitymodel.size(); i++) {
jsonArray.put(quantitymodel.get(i).getJSONObject());
}
jsonParser.getandpostJSONFromUrl(url, "POST",jsonArray);
return null;
}
#Override
protected void onPostExecute(String file_url) {
final Controller aController = (Controller) getApplicationContext();
// dismiss the dialog once done
pDialog.dismiss();
aController.getCart().clearCart();
aController.getProductsArraylist().clear();
Toast.makeText(getBaseContext(), "I am in second loop", Toast.LENGTH_SHORT).show();
Intent i = new Intent(getBaseContext(), FirstScreen.class);
finish();
startActivity(i);
}
}
}
public class QantityModelProduct {
private String ProductName;
private String ProductQuantity;
public QantityModelProduct(String productName, String productQuantity) {
ProductName = productName;
ProductQuantity = productQuantity;
}
public JSONObject getJSONObject() {
JSONObject obj = new JSONObject();
try {
obj.put("Name", ProductName);
obj.put("Quantity", ProductQuantity);
} catch (Exception e) {
e.printStackTrace();
}
return obj;
}
}
The following is the Json Parser Class
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
// constructor
public JSONParser() {
}
public JSONObject getandpostJSONFromUrl(String url, String method,JSONArray name) {
// Making HTTP request
try {
// defaultHttpClient
if (method == "POST") {
// request method is POST
// defaultHttpClient
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setEntity(new StringEntity(name.toString()));
HttpResponse httpResponse = httpClient.execute(httpPost);
httpPost.setHeader("jsonArray",json.toString());
HttpEntity httpEntity = httpResponse.getEntity();
int response = httpResponse.getStatusLine().getStatusCode();
is = httpEntity.getContent();
Log.e("posting Status", "Post status: " + response);
}
if (method == "GET") {
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();
}
if (method == "POST") {
try {
BufferedReader reader = new BufferedReader(
new InputStreamReader(is));
} catch (Exception e) {
Log.e("Buffer error", "Buffer error" + e);
}
} else if (method == "GET") {
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 lastly the php file that is suppose to receive those datas.
?php
define('DB_NAME', 'sshop');
define('DB_USER', 'root');
define('DB_PASSWORD', '');
define('DB_HOST', 'localhost');
$link = mysql_connect(DB_HOST,DB_USER,DB_PASSWORD);
if(!$link){
die('could not connect: '.msql_error());
}
$db_selected=mysql_select_db(DB_NAME, $link);
if(!$db_selected){
die('Can not use '.DB_NAME.':'.mysql_error());
}
if (isset($_POST['jsonArray'])){
$jArray = json_decode($jsonArray,true);
foreach ($jArray['jsonArray'] as $obj) {
$ProductName = $obj['Name']; //String
$ProductQuantity= $obj['Quantity'];
$sql="Update productlist Set Quantity='$ProductQuantity' where Name='$ProductName';";
echo $ProductName." ".$ProductQuantity;
}
}else {
echo 'empty';
}
?>
Firstly, you should not be comparing strings using ==
Try this!
if (method.equals("POST"))
Next, to debug, see what data you are sending via the Android app to the PHP webservice, by sending the same request as response. So you know exactly if you are sending the data.
If the above step works fine, means the issue is on the PHP end. Use http://hurl.it or Postman client in Chrome to do a Post via browser, and then debug the PHP code. See if the data is being inserted.
This should solve your problem.
Nithin
In order to avoid executing the http relating things in the UI thread, i migrated my code inside asynctask, before that, it was working fine on versions before 3.0 -- however, after literally copy pasting the code inside asynctask, it started to giving the invalid index, size is 0 exception. Whenever I need to use the method I am applying the call --
new dataRetrievalViaAsyncTask().execute(url, null, null); --
Whats wrong down there ?
class dataRetrievalViaAsyncTask extends AsyncTask<String, Void, Void>
{
#Override
protected void onPreExecute()
{
super.onPreExecute();
}
#Override
protected Void doInBackground(String... f_url)
{
Log.i("tag", "inside doInBackground");
String url2 = f_url[0];
Log.i("tag", url2);
HttpClient httpclient = new DefaultHttpClient();
Log.i("tag", "done : HttpClient httpclient = new DefaultHttpClient();");
HttpPost httppost = new HttpPost(url2);
Log.i("tag", "done : HttpPost httppost = new HttpPost(url);");
try
{
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
Log.i("tag", "done : httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));");
HttpResponse response = httpclient.execute(httppost);
Log.i("tag", "done : HttpResponse response = httpclient.execute(httppost);");
HttpEntity entity = response.getEntity();
Log.i("tag", "done : HttpEntity entity = response.getEntity();");
is = entity.getContent();
Log.i("tag", "after : is = entity.getContent();");
} catch (Exception e)
{
Log.e("log_tag", "Error in http connection", e);
}
// convert response to string
return null;
}
protected void onPostExecute()
{
try
{
Log.i("tag","before : BufferedReader reader = new BufferedReader(new Inp");
BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
sb = new StringBuilder();
sb.append(reader.readLine() + "\n");
String line = "0";
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
is.close();
result = sb.toString();
} catch (Exception e)
{
Log.e("log_tag", "Error in http connection", e);
}
try
{
Log.i("tag", "before : jsons ");
jArray = new JSONArray(result);
JSONObject json_data = null;
Log.i("tag", Integer.toString(jArray.length()));
for (int i = 0; i < jArray.length(); i++)
{
json_data = jArray.getJSONObject(i);
uid = json_data.getInt("uid");
item1= json_data.getString("item1");
item2 = json_data.getString("item2");
item3 = json_data.getString("item3");
item4 = json_data.getString("item4");
item5 = json_data.getString("item5");
item6 = json_data.getString("item6");
favorited = json_data.getString("favorited");
currentList.add(new itemClass(uid, item1 item2)); //there is a constructor for this in the itemClass
itemClass toSendToOffline = new itemsClass(uid, item1, item2, item3, item4, item5, item6, favorited);
myDBHelper.insertFromOnlineToDBtoSendToOffline();
}
} catch (JSONException e1)
{
Toast.makeText(getBaseContext(), "Not Found", Toast.LENGTH_LONG).show();
} catch (ParseException e1)
{
e1.printStackTrace();
}
super.onPostExecute(null);
}
}
(mainly the code is stopping at --
HttpResponse response = httpclient.execute(httppost);
I can not see nameValuePairs variable initialized anywhere, which is actually causing problem.
class dataRetrievalViaAsyncTask extends AsyncTask<Void, Void, String>
{
String URL = "";
public dataRetrievalViaAsyncTask( String url )
{
URL = url;
}
#Override
protected void onPreExecute()
{
}
#Override
protected String doInBackground(Void... f_url)
{
String result="";
try
{
result=fetchdataFromServer(URL);
}
catch (JSONException e)
{
e.printStackTrace();
}
return result;
}
protected void onPostExecute(String result)
{
// See your results as string //result
}
public JSONObject getJsonObjectToRequestToServer(String plid) throws JSONException
{
JSONObject parms = new JSONObject();
parms.put("user_id", "");
parms.put("app_key", "xyz");
parms.put("secret", "abc");
parms.put("token", "");
parms.put("playurl", "1");
parms.put("mode", "playlistdetail");
parms.put("playlist_id", plid);
return parms;
}
public String fetchdataFromServer(String url) throws JSONException
{
String stringresponce = null;
try
{
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(URL);
JSONObject parms = getJsonObjectToRequestToServer("1");
StringEntity se;
se = new StringEntity(parms.toString());
httpPost.setEntity(se);
httpPost.setHeader("Content-type", "application/json");
#SuppressWarnings("rawtypes")
ResponseHandler responseHandler = new BasicResponseHandler();
stringresponce = httpClient.execute(httpPost, responseHandler);
}
catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}
catch (ClientProtocolException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
return stringresponce;
}
}
put this code in your code and pass arguments ass you need this is the way how i request to server and get json response as string from result variable pass arguments to your url as i passed by making json object then convert them to string
then execute like this............
dataRetrievalViaAsyncTask asyncTask=new dataRetrievalViaAsyncTask(Yoururl);
asyncTask.execute();
hope this will help if you have some issues please post here thanks......