Develop Reference

Android app, Null object reference when referencing son.toString()

This android app I am working on, I am using a tutorial located here: click here. The problem is, when I use the getallproducts.php by visiting in the browser, http://10.0.0.31/android/get_all_products.php, I get the results of the table. But when I try accessing it via code with the android app - I get the Null object reference:
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.json.JSONObject.toString()' on a null object reference
at com.example.androidhive.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:130)
at com.example.androidhive.AllProductsActivity$LoadAllProducts.doInBackground(AllProductsActivity.java:105)
at android.os.AsyncTask$2.call(AsyncTask.java:333)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
at java.lang.Thread.run(Thread.java:764) 
The error is on the line(s):
JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Products: ", json.toString());
public class AllProductsActivity extends ListActivity {
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> productsList;
// url to get all products list
private static String url_all_products = "http://10.0.0.31:80/android/get_all_products.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_PRODUCTS = "products";
private static final String TAG_PID = "pid";
private static final String TAG_NAME = "name";
// products JSONArray
JSONArray products = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.all_products);
// Hashmap for ListView
productsList = new ArrayList<HashMap<String, String>>();
// Loading products in Background Thread
new LoadAllProducts().execute();
// Get listview
ListView lv = getListView();
// on seleting single product
// launching Edit Product Screen
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String pid = ((TextView) view.findViewById(R.id.pid)).getText()
.toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),
EditProductActivity.class);
// sending pid to next activity
in.putExtra(TAG_PID, pid);
// starting new activity and expecting some response back
startActivityForResult(in, 100);
}
});
}
// Response from Edit Product Activity
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// if result code 100
if (resultCode == 100) {
// if result code 100 is received
// means user edited/deleted product
// reload this screen again
Intent intent = getIntent();
finish();
startActivity(intent);
}
}
/**
* Background Async Task to Load all product by making HTTP Request
* */
class LoadAllProducts extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AllProductsActivity.this);
pDialog.setMessage("Loading products. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Products: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
products = json.getJSONArray(TAG_PRODUCTS);
// looping through All Products
for (int i = 0; i < products.length(); i++) {
JSONObject c = products.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_PID);
String name = c.getString(TAG_NAME);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_PID, id);
map.put(TAG_NAME, name);
// adding HashList to ArrayList
productsList.add(map);
}
} else {
// no products found
// Launch Add New product Activity
Intent i = new Intent(getApplicationContext(),
NewProductActivity.class);
// Closing all previous activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
AllProductsActivity.this, productsList,
R.layout.list_item, new String[] { TAG_PID,
TAG_NAME},
new int[] { R.id.pid, R.id.name });
// updating listview
setListAdapter(adapter);
}
});
}
}
}
<?php
/*
* Following code will list all the products
*/
// array for JSON response
$response = array();
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// import database connection variables
require_once __DIR__ . '/db_config.php';
// Connecting to mysql database
$con = mysqli_connect(DB_SERVER, DB_USER, DB_PASSWORD) or die(mysqli_error($con));
mysqli_select_db($con,DB_DATABASE);
// get all products from products table
$result = mysqli_query($con,"SELECT *FROM products") or die(mysqli_error($con));
// check for empty result
if (mysqli_num_rows($result) > 0) {
// looping through all results
// products node
$response["products"] = array();
while ($row = mysqli_fetch_array($result)) {
// temp user array
$product = array();
$product["pid"] = $row["pid"];
$product["name"] = $row["name"];
$product["price"] = $row["price"];
$product["description"] = $row["description"];
$product["created_at"] = $row["created_at"];
$product["updated_at"] = $row["updated_at"];
// push single product into final response array
array_push($response["products"], $product);
}
// success
$response["success"] = 1;
// echoing JSON response
echo json_encode($response);
} else {
// no products found
$response["success"] = 0;
$response["message"] = "No products found";
// echo no users JSON
echo json_encode($response);
}
?>

It was a problem networking with the emulator generally. It runs fine on a regular android device.
The android device has a different address space.

List view and Async Task not Communicating to delete item?

I've got a simple class. It loads data from my localhost and populates in a listview with android:id/list.
I've set a onclick listener to call my delete async task when I click an item.
My profileList.remove(position), works I can't seem to get the notifyDataSetChanged(); method to work and don't know where to place it?
Lastly, Im not sure but I don't think my class is referencing the position of the item I want to delete and matching it with my database? I keep getting "success=0 no profile" found in my LOG.
Any Ideas? I just want my count/listview to be refreshed and my item deleted.
Class:
public class ViewAllLocations extends ListActivity {
String id;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
ArrayList<HashMap<String, String>> profileList;
SimpleAdapter adapter;
// url to get all products list
private static String url_all_profile = "http://MYIP:8888/android_connect/get_all_location.php";
// url to delete product
private static final String url_delete_profile = "http://MYIP:8888/android_connect/delete_location.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_LOCATION = "Location";
private static final String TAG_ID = "id";
private static final String TAG_LATITUDE = "latitude";
private static final String TAG_LONGITUDE = "longitude";
// products JSONArray
JSONArray userprofile = null;
TextView locationCount;
int count = 0;
Button deleteLocation;
ListView lo;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_all_locations);
// Hashmap for ListView
profileList = new ArrayList<HashMap<String, String>>();
deleteLocation = (Button) findViewById(R.id.deleteLocation);
locationCount = (TextView) findViewById(R.id.locationCount);
lo = (ListView) findViewById(android.R.id.list);
//setup adapter first //now no items, after getting items (LoadAllLocations) will update it
adapter = new SimpleAdapter(
ViewAllLocations.this, profileList,
R.layout.locationitem, new String[]{TAG_ID,
TAG_LATITUDE, TAG_LONGITUDE},
new int[]{R.id.id, R.id.latitude, R.id.longitude});
// updating listview
setListAdapter(adapter);
// Loading products in Background Thread
new LoadAllLocation().execute();
deleteLocation.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
// getting product details from intent
Intent i = getIntent();
// getting product id (pid) from intent
id = i.getStringExtra(TAG_ID);
// Get listview
ListView lo = getListView();
lo.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
new DeleteLocation(position).execute();
Map<String, String> item = profileList.get(position);
String selectedItemId = item.get(TAG_ID);
new DeleteLocation(position).execute(selectedItemId);
}
});
}
/**
* **************************************************************
* Background Async Task to Delete Product
*/
class DeleteLocation extends AsyncTask<String, String, Integer> {
int deleteItemPosition;
public DeleteLocation(int position) {
// TODO Auto-generated constructor stub
this.deleteItemPosition = position;
}
/**
* Before starting background thread Show Progress Dialog
*/
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ViewAllLocations.this);
pDialog.setMessage("Deleting Location...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Deleting product
*/
protected Integer doInBackground(String... args) {
String selectedId = args[0];
// Check for success tag
int success = 0; //0=failed 1=success
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("id", selectedId));
// getting product details by making HTTP request
JSONObject json = jsonParser.makeHttpRequest(
url_delete_profile, "POST", params);
// check your log for json response
Log.d("Delete Product", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
//if (success == 1) {
// product successfully deleted
// notify previous activity by sending code 100
// Intent i = getIntent();
// send result code 100 to notify about product deletion
//setResult(100, i);
//you cant update UI on worker thread, it must be done on UI thread
// Toast.makeText(getApplicationContext(), "Location Deleted",
// Toast.LENGTH_SHORT).show();
//finish();
// }
} catch (JSONException e) {
e.printStackTrace();
}
return success;
}
/**
* After completing background task Dismiss the progress dialog
* *
*/
protected void onPostExecute(Integer result) {
// dismiss the dialog once product deleted
pDialog.dismiss();
if (result == 1) {
//success
//delete from list and update listview
profileList.remove(deleteItemPosition);
adapter.notifyDataSetChanged();
} else {
//failed
}
}
}
/**
* Background Async Task to Load all product by making HTTP Request
*/
class LoadAllLocation extends AsyncTask<String, String, Integer> {
int success;
/**
* Before starting background thread Show Progress Dialog
*/
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(ViewAllLocations.this);
pDialog.setMessage("Loading Locations. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
*/
protected Integer doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jsonParser.makeHttpRequest(url_all_profile, "GET", params);
// Check your log cat for JSON reponse
Log.d("All Profiles: ", json.toString());
try {
// Checking for SUCCESS TAG
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
userprofile = json.getJSONArray(TAG_LOCATION);
// looping through All Products
for (int i = 0; i < userprofile.length(); i++) {
JSONObject c = userprofile.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_ID);
String latitude = c.getString(TAG_LATITUDE);
String longitude = c.getString(TAG_LONGITUDE);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_ID, id);
map.put(TAG_LATITUDE, latitude);
map.put(TAG_LONGITUDE, longitude);
// adding HashList to ArrayList
profileList.add(map);
}
} else {
// no products found
// Launch Add New product Activity
//Intent i = new Intent(getApplicationContext(),
// UserLocation.class);
// Closing all previous activities
// i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
// startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
return success;
}
/**
* After completing background task Dismiss the progress dialog
* *
*/
protected void onPostExecute(Integer result) {
// dismiss the dialog after getting all products
pDialog.dismiss();
locationCount.setText("" + profileList.size());
if (result == 1) {
//success
//update adapter items
adapter.notifyDataSetChanged();
} else {
//failed
//launch activity here
}
}
}
PHP:
<?php
/*
* Following code will delete a profile from table
* A product is identified by profile id (id)
*/
// array for JSON response
$response = array();
// check for required fields
if (isset($_POST['id'])) {
$id = $_POST['id'];
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// mysql update row with matched pid
$result = mysql_query("DELETE FROM Location WHERE id = $id");
// check if row deleted or not
if (mysql_affected_rows() > 0) {
// successfully updated
$response["success"] = 1;
$response["message"] = "Profile successfully deleted";
// echoing JSON response
echo json_encode($response);
} else {
// no product found
$response["success"] = 0;
$response["message"] = "No Profile found";
// echo no users JSON
echo json_encode($response);
}
} else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>

Android -php-mysql- JSON connection issue

I imported the androidhive project(http://www.androidhive.info/2012/05/how-to-connect-android-with-php-mysql/) and I added another table to the database. The details of the second table are displayed in the second listview. After clicking on listview item the edit page is displayed. But I didn't get the second table details in the corresponding edittexts.
Here are my java classes:
JSONParser.java
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
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.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
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 = "";
// constructor
public JSONParser() {
}
// function get json from url
// by making HTTP POST or GET method
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, "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;
}
}
2.JuicesActivity
public class JuicesActivity extends ListActivity {
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> juicesList;
// url to get all products list
private static String url_all_juices = "http://10.0.2.2/android_connect/get_all_juices.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_JUICES = "juices";
private static final String TAG_JID = "j_id";
private static final String TAG_JUICENAME = "juice_name";
// products JSONArray
JSONArray juices = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.all_juices);
// Hashmap for ListView
juicesList = new ArrayList<HashMap<String, String>>();
// Loading products in Background Thread
new LoadAllJuices().execute();
// Get listview
ListView jv = getListView();
// on seleting single product
// launching Edit Product Screen
jv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String j_id = ((TextView) view.findViewById(R.id.jid)).getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),EditJuice.class);
// sending jid to next activity
in.putExtra(TAG_JID, j_id);
// starting new activity and expecting some response back
startActivityForResult(in, 100);
}
});
}
// Response from Editjuice Activity
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// if result code 100
if (resultCode == 100) {
// if result code 100 is received
// means user edited/deleted product
// reload this screen again
Intent intent = getIntent();
finish();
startActivity(intent);
}
}
/**
* Background Async Task to Load all product by making HTTP Request
* */
class LoadAllJuices extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(JuicesActivity.this);
pDialog.setMessage("Loading juices.. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_juices, "GET", params);
// Check your log cat for JSON response
Log.d("All Juices: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
juices = json.getJSONArray(TAG_JUICES);
// looping through All Products
for (int i = 0; i < juices.length(); i++) {
JSONObject c = juices.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_JID);
String name = c.getString(TAG_JUICENAME);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_JID, id);
map.put(TAG_JUICENAME, name);
// adding HashList to ArrayList
juicesList.add(map);
}
} else {
// no products found
// Launch Add New product Activity
Intent i = new Intent(getApplicationContext(),
NewProductActivity.class);
// Closing all previous activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
JuicesActivity.this, juicesList,
R.layout.list_juice, new String[] { TAG_JID,
TAG_JUICENAME},
new int[] { R.id.jid, R.id.jname });
// updating list view
setListAdapter(adapter);
}
});
}
}
}
3.EditJuice
public class EditJuice extends Activity {
EditText jName,jpric,jseller;
Button btnSavj,btnDeltJ;
String juid;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
// single product url
private static final String url_juice_details= "http://10.0.2.2/android_connect/get_juice_details.php";
// url to update product
private static final String url_update_juice = "http://10.0.2.2/android_connect/update_juice.php";
// url to delete product
private static final String url_delete_juice = "http://10.0.2.2/android_connect/delete_juice.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_JUICES = "juices";
private static final String TAG_JID = "j_id";
private static final String TAG_JUICENAME = "juice_name";
private static final String TAG_JPRICE = "price";
private static final String TAG_SELLER = "seller";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.editjuice);
// save button
btnSavj = (Button) findViewById(R.id.btnSaveJ);
btnDeltJ = (Button) findViewById(R.id.btnDelJ);
// getting juice details from intent
Intent i = getIntent();
// getting juice id jid from intent
juid = i.getStringExtra(TAG_JID);
// Getting complete juice details in background thread
new Getjuice().execute();
// save button click event
btnSavj.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// starting background task to update product
new Savejuice().execute();
}
});
// Delete button click event
btnDeltJ.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// deleting product in background thread
new Deletejuice().execute();
}
});
}
/**
* Background Async Task to Get complete product details
* */
class Getjuice extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(EditJuice.this);
pDialog.setMessage("Loading juice details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting juice details in background thread
* */
protected String doInBackground(String... params) {
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
// Check for success tag
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("j_id", juid));
// getting juice details by making HTTP request
// Note that juice details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(url_juice_details, "GET", params);
// check your log for json response
Log.d("Single juice Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received juice details
JSONArray juiceObj = json.getJSONArray(TAG_JUICES); // JSON Array
// get first juice object from JSON Array
JSONObject juice = juiceObj.getJSONObject(0);
// juice with this jid found
// Edit Text
jName = (EditText) findViewById(R.id.EditNamej);
jpric = (EditText) findViewById(R.id.EditPricej);
jseller = (EditText) findViewById(R.id.Editseller);
// display product data in EditText
jName.setText(juice.getString(TAG_JUICENAME));
jpric.setText(juice.getString(TAG_JPRICE));
jseller.setText(juice.getString(TAG_SELLER));
}else{
// juice with jid not found
}
} 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 got all details
pDialog.dismiss();
}
}
/**
* Background Async Task to Save juice Details
* */
class Savejuice extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(EditJuice.this);
pDialog.setMessage("Saving juice ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Saving juice
* */
protected String doInBackground(String... args) {
// getting updated data from EditTexts
String juice_name = jName.getText().toString();
String price = jpric.getText().toString();
String seller = jseller.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair(TAG_JID, juid));
params.add(new BasicNameValuePair(TAG_JUICENAME, juice_name));
params.add(new BasicNameValuePair(TAG_JPRICE, price));
params.add(new BasicNameValuePair(TAG_SELLER, seller));
// sending modified data through http request
// Notice that update juice url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_update_juice,"POST", params);
// check json success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully updated
Intent i = getIntent();
// send result code 100 to notify about product update
setResult(100, i);
finish();
} else {
// failed to update juice
}
} 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 juice updated
pDialog.dismiss();
}
}
/*****************************************************************
* Background Async Task to Delete Product
* */
class Deletejuice extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(EditJuice.this);
pDialog.setMessage("Deleting juice...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Deleting product
* */
protected String doInBackground(String... args) {
// Check for success tag
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("j_id", juid));
// getting product details by making HTTP request
JSONObject json = jsonParser.makeHttpRequest(url_delete_juice, "POST", params);
// check your log for json response
Log.d("Delete juice", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// product successfully deleted
// notify previous activity by sending code 100
Intent i = getIntent();
// send result code 100 to notify about product deletion
setResult(100, i);
finish();
}
} 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();
}
}
}
AddJuiceActivity
public class AddJuiceActivity extends Activity {
// Progress Dialog
private ProgressDialog pDialog;
JSONParser jsonParser = new JSONParser();
EditText inputjName,inputPric,inputseller;
// url to create new product
private static String url_create_juice = "http://10.0.2.2/android_connect/create_juice.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_juice);
// Edit Text
inputjName=(EditText)findViewById(R.id.EditNam);
inputPric = (EditText) findViewById(R.id.EditPric);
inputseller = (EditText) findViewById(R.id.Editsell);
// Create button
Button btnj = (Button) findViewById(R.id.btnjuice);
// button click event
btnj.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// creating new product in background thread
new CreateNewJ().execute();
}
});
}
/**
* Background Async Task to Create new product
* */
class CreateNewJ extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AddJuiceActivity.this);
pDialog.setMessage("Creating juice..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Creating product
* */
protected String doInBackground(String... args) {
String juicename = inputjName.getText().toString();
String price = inputPric.getText().toString();
String seller = inputseller.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("juice_name", juicename));
params.add(new BasicNameValuePair("price", price));
params.add(new BasicNameValuePair("seller", seller));
// getting JSON Object
// Note that create product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_create_juice,"POST", params);
// check log cat fro response
Log.d("Create Response", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully created product
Intent i = new Intent(getApplicationContext(), JuicesActivity.class);
startActivity(i);
// closing this screen
finish();
} else {
// failed to create product
}
} 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 done
pDialog.dismiss();
}
}
}
LogCat:
07-04 01:10:37.091: D/Single juice Details(891): {"success":1,"juice": [{"seller":"das","juice_name":"lemon","j_id":"9","price":"30.00"}]}
07-04 01:10:37.091: W/System.err(891): org.json.JSONException: No value for juices
07-04 01:10:37.101: W/System.err(891): at org.json.JSONObject.get(JSONObject.java:355)
07-04 01:10:37.101: W/System.err(891): at org.json.JSONObject.getJSONArray(JSONObject.java:549)
07-04 01:10:37.101: W/System.err(891): at com.example.androidhive.EditJuice$Getjuice$1.run(EditJuice.java:136)
07-04 01:10:37.101: W/System.err(891): at android.os.Handler.handleCallback(Handler.java:733)
07-04 01:10:37.141: W/System.err(891): at android.os.Handler.dispatchMessage(Handler.java:95)
07-04 01:10:37.181: W/System.err(891): at android.os.Looper.loop(Looper.java:136)
07-04 01:10:37.181: W/System.err(891): at android.app.ActivityThread.main(ActivityThread.java:5017)
07-04 01:10:37.181: W/System.err(891): at java.lang.reflect.Method.invokeNative(Native Method)
07-04 01:10:37.181: W/System.err(891): at java.lang.reflect.Method.invoke(Method.java:515)
07-04 01:10:37.191: W/System.err(891): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
07-04 01:10:37.251: W/System.err(891): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
07-04 01:10:37.251: W/System.err(891): at dalvik.system.NativeStart.main(Native Method)
Here is the php files.
get_all_juices.php
/*
* Following code will list all the juices
*/
// array for JSON response
$response = array();
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// get all juices from juices table
$result = mysql_query("SELECT * FROM juices") or die(mysql_error());
// check for empty result
if (mysql_num_rows($result) > 0)
{
// looping through all results
// juices node
$response["juices"] = array();
while ($row = mysql_fetch_array($result)) {
// temp user array
$juice = array();
$juice["j_id"] = $row["j_id"];
$juice["juice_name"] = $row["juice_name"];
$juice["price"] = $row["price"];
$juice["seller"] = $row["seller"];
// push single juice into final response array
array_push($response["juices"], $juice);
}
// success
$response["success"] = 1;
// echoing JSON response
echo json_encode($response);
} else {
// no products found
$response["success"] = 0;
$response["message"] = "No juices found";
// echo no users JSON
echo json_encode($response);
}
?>
update_juice
<?php
/*
* Following code will update a juice information
* A juice is identified by juice id (j_id)
*/
// array for JSON response
$response = array();
// check for required fields
if (isset($_POST['j_id']) && isset($_POST['juice_name']) && isset($_POST['price'])
&& isset($_POST['seller']))
{
$j_id = $_POST['j_id'];
$juice_name = $_POST['juice_name'];
$price = $_POST['price'];
$seller = $_POST['seller'];
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// mysql update row with matched j_id
$result = mysql_query("UPDATE juices SET juice_name = '$juice_name',
price = '$price', seller = '$seller' WHERE j_id = $j_id");
// check if row inserted or not
if ($result)
{
// successfully updated
$response["success"] = 1;
$response["message"] = "juice successfully updated.";
// echoing JSON response
echo json_encode($response);
} else {
}
} else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>
get_juice_details
<?php
/*
* Following code will get single juice details
* A juice is identified by juice id (j_id)
*/
// array for JSON response
$response = array();
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// check for post data
if (isset($_GET["j_id"]))
{
$j_id = $_GET['j_id'];
// get a juice from juices table
$result = mysql_query("SELECT *FROM juices WHERE j_id = $j_id");
if (!empty($result))
{
// check for empty result
if (mysql_num_rows($result) > 0)
{
$result = mysql_fetch_array($result);
$juice = array();
$juice["j_id"] = $result["j_id"];
$juice["juice_name"] = $result["juice_name"];
$juice["price"] = $result["price"];
$juice["seller"] = $result["seller"];
// success
$response["success"] = 1;
// user node
$response["juice"] = array();
array_push($response["juice"], $juice);
// echoing JSON response
echo json_encode($response);
} else {
// no juice found
$response["success"] = 0;
$response["message"] = "No juice found";
// echo no users JSON
echo json_encode($response);
}
} else {
// no juice found
$response["success"] = 0;
$response["message"] = "No juice found";
// echo no users JSON
echo json_encode($response);
}
} else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>

Take out the runOnUiTread call from Getjuice doInBackground. Put the setText statements for the EditTexts in onPostExecute. Thats a start...

Data from a MySQL database is not displaying in Android Textview

I can't display data from a MySQL database. I want to retrieve some data from my database and display it to the textview, but it's not working.
Java code:
public class Penjualan1 extends Activity {
// All xml labels
String pid;
TextView mejaTv;
TextView customerTv;
TextView keteranganTv;
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jsonParser = new JSONParser();
// Profile JSON url
private static final String url_order_detials = "-my url-/get_penjualan_details.php";
// ALL JSON node names
private static final String TAG_PRODUCT = "product";
private static final String TAG_SUCCESS = "success";
private static final String TAG_GET = "get";
private static final String TAG_MEJA = "meja";
private static final String TAG_CUST = "customer";
private static final String TAG_KET = "keterangan";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.f_penjualan1);
mejaTv = (TextView) findViewById(R.id.meja);
customerTv = (TextView) findViewById(R.id.customer);
keteranganTv = (TextView) findViewById(R.id.keterangan);
// Loading Profile in Background Thread
new GetProductDetails().execute();
}
/**
* Background Async Task to Get complete product details
* */
class GetProductDetails extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Penjualan1.this);
pDialog.setMessage("Loading product details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting product details in background thread
* */
protected String doInBackground(String... params) {
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
// Check for success tag
// TODO Auto-generated method stub
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("pid", pid));
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_order_detials, "GET", params);
// check your log for json response
Log.d("Single Product Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray productObj = json
.getJSONArray(TAG_GET); // JSON Array
// get first product object from JSON Array
JSONObject product = productObj.getJSONObject(0);
// product with this pid found
// Edit Text
mejaTv = (TextView) findViewById(R.id.meja);
customerTv = (TextView) findViewById(R.id.customer);
keteranganTv = (TextView) findViewById(R.id.keterangan);
// display product data in EditText
mejaTv.setText(product.getString(TAG_MEJA));
customerTv.setText(product.getString(TAG_CUST));
keteranganTv.setText(product.getString(TAG_KET));
}else{
// product with pid not found
}
} 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 got all details
pDialog.dismiss();
}
}
}
PHP Code:
/*
* Following code will get single product details
* A product is identified by product id (pid)
*/
// array for JSON response
$response = array();
// include db connect class
require_once __DIR__ . '/db_connect.php';
// connecting to db
$db = new DB_CONNECT();
// check for post data
if (isset($_GET["pid"])) {
$pid = $_GET['pid'];
// get a product from products table
$result = mysql_query("SELECT *FROM penjualan WHERE pid = $pid");
if (!empty($result)) {
// check for empty result
if (mysql_num_rows($result) > 0) {
$result = mysql_fetch_array($result);
$product = array();
$product["pid"] = $result["pid"];
$product["meja"] = $result["meja"];
$product["customer"] = $result["customer"];
$product["keterangan"] = $result["keterangan"];
// success
$response["success"] = 1;
// user node
$response["get"] = array();
array_push($response["get"], $product);
// echoing JSON response
echo json_encode($response);
} else {
// no product found
$response["success"] = 0;
$response["message"] = "No product found";
// echo no users JSON
echo json_encode($response);
}
} else {
// no product found
$response["success"] = 0;
$response["message"] = "No product found";
// echo no users JSON
echo json_encode($response);
}
} else {
// required field is missing
$response["success"] = 0;
$response["message"] = "Required field(s) is missing";
// echoing JSON response
echo json_encode($response);
}
?>
I've seen sample code from other posts, but I don't quite understand how to apply it. Can you please give me sample code?

PHP CODE
//you need add single quote near $pid
$result = mysql_query("SELECT *FROM penjualan WHERE pid = '$pid'");
For your java code :
public class Penjualan1 extends Activity {
// All xml labels
String pid;
TextView mejaTv;
TextView customerTv;
TextView keteranganTv;
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jsonParser = new JSONParser();
// Profile JSON url
private static final String url_order_detials = "-my url-/get_penjualan_details.php";
// ALL JSON node names
private static final String TAG_PRODUCT = "product";
private static final String TAG_SUCCESS = "success";
private static final String TAG_GET = "get";
private static final String TAG_MEJA = "meja";
private static final String TAG_CUST = "customer";
private static final String TAG_KET = "keterangan";
String sMeja, sCustomer, sKeterangan; //Declare a variable to handle your data.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.f_penjualan1);
mejaTv = (TextView) findViewById(R.id.meja);
customerTv = (TextView) findViewById(R.id.customer);
keteranganTv = (TextView) findViewById(R.id.keterangan);
// Loading Profile in Background Thread
new GetProductDetails().execute();
}
/**
* Background Async Task to Get complete product details
* */
class GetProductDetails extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Penjualan1.this);
pDialog.setMessage("Loading product details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting product details in background thread
* */
protected String doInBackground(String... params) {
// Check for success tag
// TODO Auto-generated method stub
int success;
try {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("pid", pid));
// getting product details by making HTTP request
// Note that product details url will use GET request
JSONObject json = jsonParser.makeHttpRequest(
url_order_detials, "GET", params);
// check your log for json response
Log.d("Single Product Details", json.toString());
// json success tag
success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully received product details
JSONArray productObj = json
.getJSONArray(TAG_GET); // JSON Array
// get first product object from JSON Array
JSONObject product = productObj.getJSONObject(0);
// product with this pid found
// Edit Text
// display product data in EditText
sMeja = product.getString(TAG_MEJA);
sCustomer = product.getString(TAG_CUST);
sKeterangan = product.getString(TAG_KET);
}else{
// product with pid not found
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
mejaTv.setText(sMeja);
customerTv.setText(sCustomer);
keteranganTv.setText(sKeterangan);
}
});
// dismiss the dialog once got all details
pDialog.dismiss();
}
}
}
Done.. :D

Can't store data to the database

I'm working on an application that stores user inputs into the database table via PHP API but i get an error message from the PHP code to the LogCat. Any advice would be greatly appreciated.
D/Create Response(284): {"message":"Required field(s) is missing","success":0}
PHP API
<?php
// array for JSON response
$response = array();
// check for the fields
if (isset($_POST['title']) && isset($_POST['request_date']) && isset($_POST['reqEndDate']) && isset($_POST['reason']) && isset($_POST['requestor']) && isset($_POST['status']) && isset($_POST['submitDate']) && isset($_POST['explanation']) && isset($_POST['hours']) && isset($_POST['id'])) {
$title = $_POST["request_title"];
$date = $_POST["request_date"];
$eDate = $_POST["reqEndDate"];
$reason = $_POST["reason"];
$requestor = $_POST["requestor"];
$status = $_POST["status"];
$dateSubmitted = $_POST["submitDate"];
$explanation = $_POST["explanation"];
$numhours = $_POST["hours"];
$id = $_POST['id'];
// mysql inserting a new row
$result = mysql_query("INSERT INTO requests(request_title, request_date, reqEndDate, reason, requestor, status, submitDate, explanation, hours, empid)
VALUES('$title', '$date', '$eDate', '$reason', '$requestor', '$status', '$dateSubmitted', '$explanation', '$numhours', '$id')");
?>
JAVA CLASS
// url to the PHP API to create new request
private static String url_create_request = "http://mywebsite.com/create_request.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_request);
// Edit Text
inputTitle = (EditText) findViewById(R.id.inputTitle);
inputSdate = (EditText) findViewById(R.id.inputSdate);
inputEdate = (EditText) findViewById(R.id.inputEdate);
inputHours = (EditText) findViewById(R.id.inputHours);
inputReason = (EditText) findViewById(R.id.inputReason);
inputExp = (EditText) findViewById(R.id.inputExp);
// Create button
Button btnCreateRequest = (Button) findViewById(R.id.btnCreateRequest);
// button click event
btnCreateRequest.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
// creating new product in background thread
new CreateNewRequest().execute();
}
});
}
class CreateNewRequest extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(NewRequestActivity.this);
pDialog.setMessage("Creating Request..");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Creating Request Required Fields
* */
protected String doInBackground(String... args) {
String title = inputTitle.getText().toString();
String date = inputSdate.getText().toString();
String eDate = inputEdate.getText().toString();
String hours = inputHours.getText().toString();
String reason = inputReason.getText().toString();
String explanation = inputExp.getText().toString();
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("request_title", title));
params.add(new BasicNameValuePair("request_date", date));
params.add(new BasicNameValuePair("reqEndDate", eDate));
params.add(new BasicNameValuePair("hours", hours));
params.add(new BasicNameValuePair("reason", reason));
params.add(new BasicNameValuePair("explanation", explanation));
// getting JSON Object
// Note that create request url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_create_request,
"POST", params);
// check log cat fro response
Log.d("Create Response", json.toString());
// check for success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully created request
Intent i = new Intent(getApplicationContext(), AllRequestsActivity.class);
startActivity(i);
// closing this screen
finish();
} else {
// failed to create request
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(String file_url) {
// dismiss the dialog once done
pDialog.dismiss();
}
}
}

Just counting your DB columns: there appears to be 12 of them. You're only inserting into 11, and after process of elimination, it looks like you're leaving out "active," which, unless it has a default value or can be null, would throw a "Required field(s) is missing" error that you're getting when trying to insert into the DB.