Develop Reference

Parsing string from protected void onCreate method to public class main activity

I have declared strings string1, string2, string3, string4.. string7 in public class. and I am getting values from MySQL database using JSON in onCreate method and storing in String variables st1 , st2, st3...., st7.
Now I need to pass these st1 ,st2,st3,...,st7 values to the string1, string2, string3... string7 respectively.
public class MainActivity extends AppCompatActivity {
private Context mContext;
private Activity mActivity;
private CoordinatorLayout mCLayout;
private Button mButtonDo;
private TextView mTextView;
private String mJSONURLString = "http://paolo.....";
String string1, string2, string3, string4, string4, string5, string6, string7;
String seats = string1 + "" + string2 + "" + string3 + "" + string4 + "" + string5 + "" + string6 + "" + string7;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContext = getApplicationContext();
mActivity = MainActivity.this;
mCLayout = (CoordinatorLayout) findViewById(R.id.coordinator_layout);
mTextView = (TextView) findViewById(R.id.tv);
mTextView.setText("");
RequestQueue requestQueue = Volley.newRequestQueue(mContext);
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.POST, mJSONURLString, null,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray seat) {
try {
// Loop through the array elements
for (int i = 0; i < seat.length(); i++) {
// Get current json object
JSONObject student = seat.getJSONObject(i);
String st1 = student.getString("st1");
String st2 = student.getString("st2");
String st3 = student.getString("st3");
String st4 = student.getString("st4");
String st5 = student.getString("st5");
String st6 = student.getString("st6");
String st7 = student.getString("st7");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
});
requestQueue.add(jsonArrayRequest);
}
}

If you are getting the elements in the for loop as you are doing :
String st1 = student.getString("st1");
String st2 = student.getString("st2");
String st3 = student.getString("st3");
String st4 = student.getString("st4");
String st5 = student.getString("st5");
String st6 = student.getString("st6");
String st7 = student.getString("st7");
You should change it to :
string1 = student.getString("st1");
string2 = student.getString("st2");
string3 = student.getString("st3");
string4 = student.getString("st4");
string5 = student.getString("st5");
string6 = student.getString("st6");
string7 = student.getString("st7");
And if you want to update UI or something just add the method inside the onResponse() I mean if you want to display that text you can create a
private void showText(){
your_text_view1.setText(string1);
(....)
}
And then in the end of onResponse() just put this method.

Inquire variable in other class / activity if it is filled

I am beginner in Java and Android. I searched yesterday a whole day for a solution. I want to check a variable in second activity if it is filled. Or ask the methode "loadAngebote" if it has a return value. The methode that is executed to get data is:
public class loadAngebote extends AsyncTask<String, Void, ArrayList<ArtikelAngebot>>{
String data ="";
#Override
protected ArrayList<ArtikelAngebot> doInBackground(String... params){
try
{
URL url = new URL("http://url/file.php");
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line = "";
while(line != null){
line = bufferedReader.readLine();
data = data + line;
}
ArrayList<String> listdata = new ArrayList<>();
JSONArray jArray = new JSONArray(data);
for(int i =0 ;i <jArray.length(); i++){
listdata.add(jArray.getString(i));
}
JSONArray json = new JSONArray(data);
String[][] matrix = new String[json.length()][6];
for (int i=0; i < json.length(); i++) {
JSONObject obj = json.getJSONObject(i);
matrix[i][0] = String.valueOf(obj.getInt("ID"));
matrix[i][1] = String.valueOf(obj.getInt("art_nr"));
matrix[i][2] = String.valueOf(obj.getDouble("preis"));
matrix[i][3] = obj.getString("von");
matrix[i][4] = obj.getString("bis");
matrix[i][5] = obj.getString("art_link");
}
String[] all_ID = new String[matrix.length];
String[] all_art_nr = new String[matrix.length];
String[] all_preis = new String[matrix.length];
String[] all_von = new String[matrix.length];
String[] all_bis = new String[matrix.length];
String[] all_link = new String[matrix.length];
for (int i = 0; i < matrix.length; i++) {
all_ID[i] = matrix[i][0];
all_art_nr[i] = matrix[i][1];
all_preis[i] = matrix[i][2];
all_von[i] = matrix[i][3];
all_bis[i] = matrix[i][4];
all_link[i] = matrix[i][5];
}
ArrayList<ArtikelAngebot> dataList = new ArrayList<>();
for (int i = 0; i < matrix.length; i++) {
ArtikelAngebot angebote = new ArtikelAngebot(all_art_nr[i], "Für: " + all_preis[i] + " €","Von: " + all_von[i],"Bis: " + all_bis[i], all_link[i]);
dataList.add(angebote);
}
return dataList; <--------------------------------------------
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(ArrayList<ArtikelAngebot> QueryResult){
AngeboteListAdapter adapter = new AngeboteListAdapter(AngeboteActivity.this, R.layout.angebote_list_view_adapter, QueryResult);
mListView.setAdapter(adapter);
}
}
I need to check if dataList is filled in an other class of my app:
static String getLocationResultTitle(Context context, List<Location> locations) {
if(?????dataList_is_filled?????){
String numLocationsReported = "Text1";
return numLocationsReported + " \r\n \r\n :) \r\n \r\n" + DateFormat.getDateTimeInstance().format(new Date());
}else{
String numLocationsReported = "Text2";
return numLocationsReported + " \r\n \r\n :( \r\n \r\n" + DateFormat.getDateTimeInstance().format(new Date());
}

Updated Answer
Here is your AngeboteActivity
public class AngeboteActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public enum DataHolder {
INSTANCE;
private ArrayList<ArtikelAngebot> mObjectList;
public static boolean hasData() {
return INSTANCE.mObjectList != null;
}
public static ArrayList<ArtikelAngebot> getData() {
final ArrayList<ArtikelAngebot> retList = INSTANCE.mObjectList;
INSTANCE.mObjectList = null;
return retList;
}
public static void setData(final ArrayList<ArtikelAngebot> objectList) {
INSTANCE.mObjectList = objectList;
}
}
public class loadAngebote extends AsyncTask<String, Void, ArrayList<ArtikelAngebot>> {
String data = "";
#Override
protected ArrayList<ArtikelAngebot> doInBackground(String... params) {
try {
URL url = new URL("http://url/file.php");
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line = "";
while (line != null) {
line = bufferedReader.readLine();
data = data + line;
}
ArrayList<String> listdata = new ArrayList<>();
JSONArray jArray = new JSONArray(data);
for (int i = 0; i < jArray.length(); i++) {
listdata.add(jArray.getString(i));
}
JSONArray json = new JSONArray(data);
String[][] matrix = new String[json.length()][6];
for (int i = 0; i < json.length(); i++) {
JSONObject obj = json.getJSONObject(i);
matrix[i][0] = String.valueOf(obj.getInt("ID"));
matrix[i][1] = String.valueOf(obj.getInt("art_nr"));
matrix[i][2] = String.valueOf(obj.getDouble("preis"));
matrix[i][3] = obj.getString("von");
matrix[i][4] = obj.getString("bis");
matrix[i][5] = obj.getString("art_link");
}
String[] all_ID = new String[matrix.length];
String[] all_art_nr = new String[matrix.length];
String[] all_preis = new String[matrix.length];
String[] all_von = new String[matrix.length];
String[] all_bis = new String[matrix.length];
String[] all_link = new String[matrix.length];
for (int i = 0; i < matrix.length; i++) {
all_ID[i] = matrix[i][0];
all_art_nr[i] = matrix[i][1];
all_preis[i] = matrix[i][2];
all_von[i] = matrix[i][3];
all_bis[i] = matrix[i][4];
all_link[i] = matrix[i][5];
}
ArrayList<ArtikelAngebot> dataList = new ArrayList<>();
for (int i = 0; i < matrix.length; i++) {
ArtikelAngebot angebote = new ArtikelAngebot(all_art_nr[i], "Für: " + all_preis[i] + " €", "Von: " + all_von[i], "Bis: " + all_bis[i], all_link[i]);
dataList.add(angebote);
}
DataHolder.setData(dataList);
return dataList;
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(ArrayList<ArtikelAngebot> QueryResult) {
AngeboteListAdapter adapter = new AngeboteListAdapter(AngeboteActivity.this, R.layout.angebote_list_view_adapter, QueryResult);
mListView.setAdapter(adapter);
}
}
}
And Here is your Utils class
public class Utils {
static String getLocationResultTitle(Context context, List<Location> locations) {
if (AngeboteActivity.DataHolder.hasData()) {
//if hasData do your stuff what you want
String numLocationsReported = "Text1";
return numLocationsReported + " \r\n \r\n :) \r\n \r\n" + DateFormat.getDateTimeInstance().format(new Date());
} else {
String numLocationsReported = "Text2";
return numLocationsReported + " \r\n \r\n :( \r\n \r\n" + DateFormat.getDateTimeInstance().format(new Date());
}
}
}

Ok now Your Activity looks good..
Now in Utils class change if(loadAngebote.DataHolder.hasData()) to if (AngeboteActivity.DataHolder.hasData())
Here:-
public class Utils {
static String getLocationResultTitle(Context context, List<Location> locations) {
if (AngeboteActivity.DataHolder.hasData()) {
//if hasData do your stuff what you want
String numLocationsReported = "Text1";
return numLocationsReported + " \r\n \r\n :) \r\n \r\n" + DateFormat.getDateTimeInstance().format(new Date());
} else {
String numLocationsReported = "Text2";
return numLocationsReported + " \r\n \r\n :( \r\n \r\n" + DateFormat.getDateTimeInstance().format(new Date());
}
}
}

UPDATED ANSWER My Angebote Activity:
public class AngeboteActivity extends AppCompatActivity {
public static TextView data;
public static ListView mListView;
private static final String TAG = "AngeboteActivity";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_angebote);
data = (TextView) findViewById(R.id.data);
mListView = (ListView) findViewById(R.id.listView);
new loadAngebote().execute();
}
#Override
protected void onStart() {
super.onStart();
Log.i(TAG, "On Start .....");
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Object Inhalt = parent.getAdapter().getItem(position);
final Intent intent = new Intent(AngeboteActivity.this, AngeboteRequestInfoActivity.class);
Bundle bundle = new Bundle();
//Objekt Serialisieren
bundle.putSerializable("object", (Serializable) Inhalt);
//Objekt in Intent Extras packen
intent.putExtras(bundle);
AngeboteActivity.this.startActivity(intent);
}
});
}
private class QueryResult {
ArrayList<ArtikelAngebot> dataList;
public QueryResult(ArrayList<ArtikelAngebot> dataList) {
this.dataList = dataList ;
}
}
public enum DataHolder {
INSTANCE;
private ArrayList<ArtikelAngebot> mObjectList;
public static boolean hasData() {
return INSTANCE.mObjectList != null;
}
public static void setData(final ArrayList<ArtikelAngebot> objectList) {
INSTANCE.mObjectList = objectList;
}
public static ArrayList<ArtikelAngebot> getData() {
final ArrayList<ArtikelAngebot> retList = INSTANCE.mObjectList;
INSTANCE.mObjectList = null;
return retList;
}
}
public class loadAngebote extends AsyncTask<String, Void, ArrayList<ArtikelAngebot>>{
String data ="";
#Override
protected ArrayList<ArtikelAngebot> doInBackground(String... params){
try
{
URL url = new URL("http://url/request.php");
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line = "";
while(line != null){
line = bufferedReader.readLine();
data = data + line;
}
ArrayList<String> listdata = new ArrayList<>();
JSONArray jArray = new JSONArray(data);
for(int i =0 ;i <jArray.length(); i++){
listdata.add(jArray.getString(i));
}
JSONArray json = new JSONArray(data);
String[][] matrix = new String[json.length()][6];
for (int i=0; i < json.length(); i++) {
JSONObject obj = json.getJSONObject(i);
matrix[i][0] = String.valueOf(obj.getInt("ID"));
matrix[i][1] = String.valueOf(obj.getInt("art_nr"));
matrix[i][2] = String.valueOf(obj.getDouble("preis"));
matrix[i][3] = obj.getString("von");
matrix[i][4] = obj.getString("bis");
matrix[i][5] = obj.getString("art_link");
}
String[] all_ID = new String[matrix.length];
String[] all_art_nr = new String[matrix.length];
String[] all_preis = new String[matrix.length];
String[] all_von = new String[matrix.length];
String[] all_bis = new String[matrix.length];
String[] all_link = new String[matrix.length];
for (int i = 0; i < matrix.length; i++) {
all_ID[i] = matrix[i][0];
all_art_nr[i] = matrix[i][1];
all_preis[i] = matrix[i][2];
all_von[i] = matrix[i][3];
all_bis[i] = matrix[i][4];
all_link[i] = matrix[i][5];
}
ArrayList<ArtikelAngebot> dataList = new ArrayList<>();
for (int i = 0; i < matrix.length; i++) {
ArtikelAngebot angebote = new ArtikelAngebot(all_art_nr[i], "Für: " + all_preis[i] + " €","Von: " + all_von[i],"Bis: " + all_bis[i], all_link[i]);
dataList.add(angebote);
}
DataHolder.setData(dataList);
return dataList;
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(ArrayList<ArtikelAngebot> QueryResult){
AngeboteListAdapter adapter = new AngeboteListAdapter(AngeboteActivity.this, R.layout.angebote_list_view_adapter, QueryResult);
mListView.setAdapter(adapter);
}
}
My Utils.java class
public class Utils {
final static String KEY_LOCATION_UPDATES_REQUESTED = "location-updates-requested";
final static String KEY_LOCATION_UPDATES_RESULT = "location-update-result";
static void setRequestingLocationUpdates(Context context, boolean value) {
PreferenceManager.getDefaultSharedPreferences(context)
.edit()
.putBoolean(KEY_LOCATION_UPDATES_REQUESTED, value)
.apply();
}
static boolean getRequestingLocationUpdates(Context context) {
return PreferenceManager.getDefaultSharedPreferences(context)
.getBoolean(KEY_LOCATION_UPDATES_REQUESTED, false);
}
/**
* Posts a notification in the notification bar when a transition is detected.
* If the user clicks the notification, control goes to the MainActivity.
*/
static void sendNotification(Context context, String notificationDetails) {
// Create an explicit content Intent that starts the main Activity.
Intent notificationIntent = new Intent(context, AngeboteActivity.class);
notificationIntent.putExtra("from_notification", true);
// Construct a task stack.
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
// Add the main Activity to the task stack as the parent.
stackBuilder.addParentStack(AngeboteActivity.class);
// Push the content Intent onto the stack.
stackBuilder.addNextIntent(notificationIntent);
// Get a PendingIntent containing the entire back stack.
PendingIntent notificationPendingIntent =
stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
// Get a notification builder that's compatible with platform versions >= 4
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
// Notification Einstellungen
builder.setSmallIcon(R.drawable.ic_launcher)
// In a real app, you may want to use a library like Volley
// to decode the Bitmap.
.setLargeIcon(BitmapFactory.decodeResource(context.getResources(),
R.drawable.ic_launcher))
.setColor(Color.RED)
.setContentTitle("Ihre Apotheke vor Ort")
.setContentText(notificationDetails)
.setContentIntent(notificationPendingIntent);
// Dismiss notification once the user touches it.
builder.setAutoCancel(true);
// Get an instance of the Notification manager
NotificationManager mNotificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
// Issue the notification
mNotificationManager.notify(0, builder.build());
}
/**
* Returns the title for reporting about a list of {#link Location} objects.
*
* #param context The {#link Context}.
*/
static String getLocationResultTitle(Context context, List<Location> locations) {
if (AngeboteActivity.DataHolder.hasData()) {
//if hasData do your stuff what you want
String numLocationsReported = "Text1";
return numLocationsReported + " \r\n \r\n :) \r\n \r\n" + DateFormat.getDateTimeInstance().format(new Date());
}else{
String numLocationsReported = "Text2";
return numLocationsReported + " \r\n \r\n :( \r\n \r\n" + DateFormat.getDateTimeInstance().format(new Date());
}
}
/**
* Returns te text for reporting about a list of {#link Location} objects.
*
* #param locations List of {#link Location}s.
*/
private static String getLocationResultText(Context context, List<Location> locations) {
if (locations.isEmpty()) {
return "Unbekannte Position";
}
StringBuilder sb = new StringBuilder();
for (Location location : locations) {
sb.append("(");
sb.append(location.getLatitude());
sb.append(", ");
sb.append(location.getLongitude());
sb.append(")");
sb.append("\n");
}
return sb.toString();
}
static void setLocationUpdatesResult(Context context, List<Location> locations) {
PreferenceManager.getDefaultSharedPreferences(context)
.edit()
.putString(KEY_LOCATION_UPDATES_RESULT, getLocationResultTitle(context, locations)
+ "\n" + getLocationResultText(context, locations))
.apply();
}
static String getLocationUpdatesResult(Context context) {
return PreferenceManager.getDefaultSharedPreferences(context)
.getString(KEY_LOCATION_UPDATES_RESULT, "");
}
}

JSON respone in list view display based on the particular condition in android

I need to display the items on particular condition .I done that one.I have three tabs are present.In the first tab A ,i display the list of items,in that only one item is present.But when you move to tab B and again come to tab A,we can see two items.I need to avoid that repeating item displaying, how to do that one, please help me if you have an idea,Thank you in advance
Here is my code:
List View list;
ListViewAdapter adapter;
ArrayList<String> title_array = new ArrayList<String>();
ArrayList<String> title_array1 = new ArrayList<String>();
ArrayList<String> title_array2 = new ArrayList<String>();
ArrayList<String> title_array3 = new ArrayList<String>();
ArrayList<String> title_array4 = new ArrayList<String>();
ArrayList<String> title_array5 = new ArrayList<String>();
ArrayList<String> title_array6 = new ArrayList<String>();
String response_value;
JSONObject result;
JSONArray tokenList;
JSONObject oj5;
String appid;
JSONObject oj;
String fileid;
HttpEntity entity;
String status ,borrowername,coborrowername,loannumber,addrs1,city;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.menu_frame, container, false);
list = (ListView) rootView.findViewById(R.id.listview);
// Pass results to ListViewAdapter Class
new AsyncTaskParseJson().execute();
return rootView;
}
// you can make this class as another java file so it will be separated from your main activity.
public class AsyncTaskParseJson extends AsyncTask<String, String, String> {
final String TAG = "AsyncTaskParseJson.java";
// contacts JSONArray
JSONArray dataJsonArr = null;
#Override
protected void onPreExecute() {}
#Override
protected String doInBackground(String... arg0) {
// post the specific format data to json url
try {
HttpClient httpClient = new DefaultHttpClient();
JSONObject object = new JSONObject();
object.put("Username", "******");
object.put("Password", "******");
JSONObject jsonObject = new JSONObject();
jsonObject.put("Authentication", object);
jsonObject.put("RequestType", 4);
HttpPost postMethod = new HttpPost("*********");
postMethod.setEntity(new StringEntity(jsonObject.toString()));
postMethod.setHeader("Accept", "application/json");
postMethod.setHeader("Content-type", "application/json");
HttpResponse response = httpClient.execute(postMethod);
entity = response.getEntity();
response_value = EntityUtils.toString(entity).toString();
// Log.e(TAG, response_value);
if (entity != null) {
//Convert String to JSON Object
JSONObject result = new JSONObject(response_value);
JSONArray tokenList = result.getJSONArray("Files");
}
} catch (Exception e) {
e.printStackTrace();
}
return response_value;
}
#Override
protected void onPostExecute(String response_value) {
super.onPostExecute(response_value);
// dismiss the dialog after getting all products
try
{
if (entity != null) {
result = new JSONObject(response_value);
tokenList = result.getJSONArray("Files");
for(int i=0;i<=tokenList.length();i++)
{
oj = tokenList.getJSONObject(i);
String oj1 = oj.getString("FileID");
JSONObject oj12= (JSONObject) tokenList.getJSONObject(i).get("Borrower");
JSONObject oj2 = (JSONObject) tokenList.getJSONObject(i).get("CoBorrower");
JSONObject oj3 = (JSONObject) tokenList.getJSONObject(i).get("LoanDetails");
JSONObject oj4 = (JSONObject) tokenList.getJSONObject(i).get("PropertyAddress");
fileid = oj.getString("FileID");
borrowername = oj12.getString("FirstName");
coborrowername = oj2.getString("FirstName");
loannumber = oj3.getString("LoanNumber");
addrs1 = oj4.getString("Address1");
city = oj4.getString("City");
JSONArray orders = oj.getJSONArray("Orders");
for(int n=0;n<orders.length();n++){
JSONObject oj5 = orders.getJSONObject(n);
appid = oj5.getString("ApplicationOrderId");
String duedate = oj5.getString("DueDate");
status = oj5.getString("Status");
// Log.e(TAG, appid +"/"+ appid1);
Log.e(TAG, appid + "/" + borrowername + "/"+ coborrowername + "/"+ addrs1 + "/"+ city + "/"+ loannumber + fileid );
if(status.equals("1")){
title_array3.add("New");
title_array1.add(addrs1 + " ,"+ city);
title_array.add(borrowername +" , "+coborrowername);
title_array2.add("Duedate");
// title_array3.add(status);
title_array4.add(appid);
title_array5.add(loannumber);
title_array6.add(fileid);
list.setOnItemClickListener(new OnItemClickListener() {
#Override public void onItemClick(AdapterView<?> arg0, View arg1,int position, long arg3)
{
Intent first = new Intent(getActivity(),DetailView.class);
first.putExtra("fileid", fileid);
startActivity(first);
} });
}
}
}
}
}
catch(Exception e)
{
e.printStackTrace();
}
adapter = new ListViewAdapter(getActivity(), title_array,title_array1,title_array2,title_array3,title_array4,title_array5,title_array6);
list.setAdapter(adapter);
}
}
}

changing interface in an asynctask (the right way)

I'm trying to change the process data retrieved into a list view. The data is recieved properly. but i'm failing to make up the list view the right way.
Here is my asynctask class
class GetFriendsInfo extends AsyncTask<String, String, String>{
String id = "";
String fullName = "";
String birthday = "";
protected void onPreExecute() {
super.onPreExecute();
pd_GetData = new ProgressDialog(MainActivity.this);
pd_GetData.setMessage("Getting friend data");
pd_GetData.setIndeterminate(false);
pd_GetData.setCancelable(true);
pd_GetData.show();
}
#Override
protected String doInBackground(String... params) {
JSONArray friendArray;
List<NameValuePair> param = new ArrayList<NameValuePair>();
param.add(new BasicNameValuePair("user_id", id));
param.add(new BasicNameValuePair("user_id", fullName));
param.add(new BasicNameValuePair("user_id", birthday));
JSONObject jsonObject = jsonParser.makeHttpRequest(url_get_birthdays,"GET", param);
try{
int success = jsonObject.getInt(TAG_SUCCESS);
if (success == 1){
Log.d("PHP Server [GET]", "Retrieved user data");
String jsonString = jsonObject.getString("message");
friendArray = new JSONArray(jsonString);
String[] names = new String[friendArray.length()];
String[] birthdays = new String[friendArray.length()];
String[] ids = new String[friendArray.length()];
for(int i=0; i<friendArray.length(); i++) {
JSONObject friend = friendArray.getJSONObject(i);
String friend_id = friend.getString("id");
ids[i] = friend_id;
String friend_name = friend.getString("fullName");
names[i] = friend_name;
String friend_birthday = friend.getString("birthday");
birthdays[i] = friend_birthday;
}
Log.i("friend:", Arrays.toString(ids) + " " + Arrays.toString(names) + " " + Arrays.toString(birthdays));
List<HashMap<String, String>> birthday = new ArrayList<HashMap<String, String>>();
for (int i=0;i<names.length;i++){
HashMap<String, String> hm = new HashMap<String, String>();
hm.put("names", names[i]);
hm.put("ids", ids[i]);
hm.put("birthdays", birthdays[i]);
birthday.add(hm);
}
String[] from = {"names", "ids", "birthdays"};
int[] to = {R.id.text1, R.id.im_ProfilePic, R.id.text2};
SimpleAdapter adapter = new SimpleAdapter(MainActivity.this, birthday, R.layout.listitem_birthday, from, to);
HorizontalListView featuredList = (HorizontalListView) findViewById(R.id.lv_Birthdays);
featuredList.setAdapter(adapter);
}else{
Log.d("PHP Server [GET]", "Failed retrieve user data");
}
}catch (JSONException e){
e.printStackTrace();
}catch (RuntimeException e){
e.printStackTrace();
}
return null;
}
protected void onPostExecute(JSONArray result) {
// dismiss the dialog once done
pd_GetData.dismiss();
}
}
I know that i shouldn't create the listview in the doInBackground. But i don't have a clue how i should do it.

This should give you the idea. Read the inline comments:
class GetFriendsInfo extends AsyncTask<Void, Void, JSONObject> {
private String url;
public GetFriendsInfo(String url_get_birthdays) {
this.url = url_get_birthdays;
}
#Override
protected JSONObject doInBackground(Void... params) {
// Make your network call and get your JSONObject
JSONObject jsonObject = jsonParser.makeHttpRequest(url_get_birthdays,"GET", param);
return jsonObject;
}
#Override
protected void onPostExecute(JSONObject jsonObject) {
// Here you get your jsonObject on the main thread. You can parse it and update your UI
// Convert your jsonObject to what you want and then show the dialog
String[] from = {"names", "ids", "birthdays"};
int[] to = {R.id.text1, R.id.im_ProfilePic, R.id.text2};
SimpleAdapter adapter = new SimpleAdapter(MainActivity.this, birthday, R.layout.listitem_birthday, from, to);
HorizontalListView featuredList = (HorizontalListView) findViewById(R.id.lv_Birthdays);
featuredList.setAdapter(adapter);
}
}

set your adapter in onPostExecute() method.
class GetFriendsInfo extends AsyncTask<String, String, String>{
String id = "";
String fullName = "";
String birthday = "";
List<HashMap<String, String>> birthday;
protected void onPreExecute() {
super.onPreExecute();
pd_GetData = new ProgressDialog(MainActivity.this);
pd_GetData.setMessage("Getting friend data");
pd_GetData.setIndeterminate(false);
pd_GetData.setCancelable(true);
pd_GetData.show();
}
#Override
protected String doInBackground(String... params) {
JSONArray friendArray;
List<NameValuePair> param = new ArrayList<NameValuePair>();
param.add(new BasicNameValuePair("user_id", id));
param.add(new BasicNameValuePair("user_id", fullName));
param.add(new BasicNameValuePair("user_id", birthday));
JSONObject jsonObject = jsonParser.makeHttpRequest(url_get_birthdays,"GET", param);
try{
int success = jsonObject.getInt(TAG_SUCCESS);
if (success == 1){
Log.d("PHP Server [GET]", "Retrieved user data");
String jsonString = jsonObject.getString("message");
friendArray = new JSONArray(jsonString);
String[] names = new String[friendArray.length()];
String[] birthdays = new String[friendArray.length()];
String[] ids = new String[friendArray.length()];
for(int i=0; i<friendArray.length(); i++) {
JSONObject friend = friendArray.getJSONObject(i);
String friend_id = friend.getString("id");
ids[i] = friend_id;
String friend_name = friend.getString("fullName");
names[i] = friend_name;
String friend_birthday = friend.getString("birthday");
birthdays[i] = friend_birthday;
}
Log.i("friend:", Arrays.toString(ids) + " " + Arrays.toString(names) + " " + Arrays.toString(birthdays));
birthday = new ArrayList<HashMap<String, String>>();
for (int i=0;i<names.length;i++){
HashMap<String, String> hm = new HashMap<String, String>();
hm.put("names", names[i]);
hm.put("ids", ids[i]);
hm.put("birthdays", birthdays[i]);
birthday.add(hm);
}
}else{
Log.d("PHP Server [GET]", "Failed retrieve user data");
}
}catch (JSONException e){
e.printStackTrace();
}catch (RuntimeException e){
e.printStackTrace();
}
return null;
}
protected void onPostExecute(JSONArray result) {
// dismiss the dialog once done
String[] from = {"names", "ids", "birthdays"};
int[] to = {R.id.text1, R.id.im_ProfilePic, R.id.text2};
SimpleAdapter adapter = new SimpleAdapter(MainActivity.this, birthday, R.layout.listitem_birthday, from, to);
HorizontalListView featuredList = (HorizontalListView) findViewById(R.id.lv_Birthdays);
featuredList.setAdapter(adapter);
pd_GetData.dismiss();
}
}

As UI operation can not be done in doinbackground. So first make birthday list global in asyntask.
List<HashMap<String, String>> birthday = new ArrayList<HashMap<String, String>>(); // make it Global.
move the below part from doinbackground to
protected void onPostExecute(JSONArray result) {
// dismiss the dialog once done
pd_GetData.dismiss();
String[] from = {"names", "ids", "birthdays"};
int[] to = {R.id.text1, R.id.im_ProfilePic, R.id.text2};
SimpleAdapter adapter = new SimpleAdapter(MainActivity.this, birthday, R.layout.listitem_birthday, from, to);
HorizontalListView featuredList = (HorizontalListView) findViewById(R.id.lv_Birthdays);
featuredList.setAdapter(adapter);
}
If you have still nay query please let me know.

Android: JSON and ListView's quickest refresh options?

I have the following class:
public class RandomDrunkQuotes extends Activity {
/** Called when the activity is first created. */
TextView txt;
#Override
public void onCreate(Bundle savedInstanceState) {
Log.i("uDrew Debug", "Made it into onCreate");
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.i("uDrew Debug", "main Layout Loaded");
//Add AdMob viewer
AdView adViewer = (AdView)this.findViewById(R.id.adViewer);
adViewer.loadAd(new AdRequest());
Log.i("uDrew Debug", "Calling getServerData");
//Get Server Data and handle
getServerData();
}
public static final String KEY_121 = "http://www.url.com/android.php"; //i use my real ip here
private void getServerData() {
//Declare variables
InputStream is = null;
String result = "";
String strQuote = "";
String strID = "";
String strFName = "";
String strLInitial = "";
String strCity = "";
String strState = "";
String strDate = "";
Integer intLikes = 0;
Integer intHates = 0;
String strFNameSaid = "";
String strLInitialSaid = "";
Integer intBuzz = 0;
String strBuzzed = "";
// prepare the list of all records
List<HashMap<String, String>> fillMaps = new ArrayList<HashMap<String, String>>();
Log.i("uDrew Debug", "Declared variables");
//Declare inflater in order to inflate a layout for each quote
LinearLayout l = (LinearLayout) findViewById(R.id.myMainLayout);
LayoutInflater linflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
//http post
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://www.url.com/android.php");
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection "+e.toString());
}
//convert response to string
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();
result=sb.toString();
}catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
//parse json data
try{
Log.i("uDrew Debug", "Trying to Parse JSON Data");
//Place JSON data into array one item at a time
JSONArray jArray = new JSONArray(result);
//Loop through each record in the database
//Get ListView
ListView lv= (ListView)findViewById(R.id.listview);
// create the grid item mapping
String[] from = new String[] {"lblQuote", "lblBuzzed", "lblShared", "lblSaid", "lblLikes", "lblHates", "lblLocation", "lblDate"};
int[] to = new int[] { R.id.lblQuote, R.id.lblBuzzed, R.id.lblShared, R.id.lblSaid, R.id.lblLikes, R.id.lblHates, R.id.lblLocation, R.id.lblDate };
for(int i=0;i<jArray.length();i++){
Log.i("uDrew Debug", "Made it into JSONArray Loop");
//Get this record
JSONObject json_data = jArray.getJSONObject(i);
//Put each result into variables for later handling
strFName = json_data.getString("FName");
strLInitial = json_data.getString("LInitial");
strCity = json_data.getString("City");
strState = json_data.getString("State");
strDate = json_data.getString("Date");
strQuote = json_data.getString("Quote");
intLikes = Integer.parseInt(json_data.getString("Likes"));
intHates = Integer.parseInt(json_data.getString("Hates"));
strFNameSaid = json_data.getString("FNameSaid");
strLInitialSaid = json_data.getString("LInitialSaid");
intBuzz = Integer.parseInt(json_data.getString("Buzz"));
Log.i("uDrew Debug", "Made it past JSON Parsing");
switch(intBuzz){
case 1:
strBuzzed = ("One Beer\nSyndrome");
break;
case 2:
strBuzzed = ("Buzzed");
break;
case 3:
strBuzzed = ("Drunk");
break;
case 4:
strBuzzed = ("Trashed");
break;
case 5:
strBuzzed = "Retarded";
break;
}
HashMap<String, String> map = new HashMap<String, String>();
map.put("lblQuote", strQuote);
map.put("lblBuzzed", strBuzzed);
map.put("lblShared", strFName + " " + strLInitial);
map.put("lblSaid",strFNameSaid + " " + strLInitialSaid);
map.put("lblDate", strDate);
map.put("lblLocation", strCity + ", " + strState);
map.put("lblLikes", intLikes.toString());
map.put("lblHates", intHates.toString());
fillMaps.add(map);
}//End For loop
// fill in the grid_item layout
SimpleAdapter adapter = new SimpleAdapter(this, fillMaps, R.layout.myviews, from, to);
lv.setAdapter(adapter);
}catch(JSONException e){
Log.e("log_tag", "Error parsing data "+e.toString());
}
}
I'd like to know how to refresh the data retrieved from the server in the quickest fashion. Right now I have an Refresh button in the options button that calls getServerData(); but this seems to take a very long time. Any thoughts are welcome.

You should create an AsyncTask and call getServerData() method from its doInBackground() method. This method must return the data from the server. Then in onPostExecute() method you should populate the ListView with this data.