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After pressing back button, previous activity (listview) is emtpty

In my android project i have a listview with items loaded from an online database. When i click on an item i go to another class where i can delete or update it. My problem is that when i press the back button, my listview is empty. I tried onBackPressed with intent to go to previous activity but it is empty again. I want to reload my listview when from a clicked item i press the back button. Below is my code.
The listview:
public class AllStudents extends AppCompatActivity {
ListView StudentListView;
ProgressBar progressBar;
String HttpUrl = "http://sissy-nickels.000webhostapp.com/AllStudentData.php";
List<String> IdList = new ArrayList<>();
String LessonName;
HttpParse httpParse = new HttpParse();
ProgressDialog pDialog;
String FinalJSonObject;
HashMap<String,String> ResultHash = new HashMap<>();
String ParseResult ;
List<Student> studentList;
EditText search;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_allstudents);
StudentListView = (ListView)findViewById(R.id.listview2);
progressBar = (ProgressBar)findViewById(R.id.progressBar);
LessonName = getIntent().getStringExtra("Lesson");
HttpWebCall(LessonName);
//Adding ListView Item click Listener.
StudentListView.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// TODO Auto-generated method stub
Intent intent = new Intent(AllStudents.this,SingleStudent.class);
// Sending ListView clicked value using intent.
intent.putExtra("ListViewValue", IdList.get(position).toString());
startActivity(intent);
//Finishing current activity after open next activity.
//finish();
}
});
search = (EditText)findViewById(R.id.search);
search.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged (CharSequence s, int start, int count, int after) {
}
// when text is entered in search box, filter list by search text
#Override
public void onTextChanged(CharSequence cs, int start, int before, int count) {
filterStudents(cs);
}
#Override
public void afterTextChanged(Editable s) {
}
});
// check student's name whether contain text entered in search box
}
public void HttpWebCall(final String LessonName){
class HttpWebCallFunction extends AsyncTask<String,Void,String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = ProgressDialog.show(AllStudents.this,"Loading Data",null,true,true);
}
#Override
protected void onPostExecute(String httpResponseMsg) {
super.onPostExecute(httpResponseMsg);
pDialog.dismiss();
//Storing Complete JSon Object into String Variable.
FinalJSonObject = httpResponseMsg ;
//Parsing the Stored JSOn String to GetHttpResponse Method.
new GetHttpResponse(AllStudents.this).execute();
}
#Override
protected String doInBackground(String... params) {
ResultHash.put("LessonName",params[0]);
ParseResult = httpParse.postRequest(ResultHash, HttpUrl);
return ParseResult;
}
}
HttpWebCallFunction httpWebCallFunction = new HttpWebCallFunction();
httpWebCallFunction.execute(LessonName);
}
// JSON parse class started from here.
private class GetHttpResponse extends AsyncTask<Void, Void, Void>
{
public Context context;
public GetHttpResponse(Context context)
{
this.context = context;
}
#Override
protected void onPreExecute()
{
super.onPreExecute();
}
#Override
protected Void doInBackground(Void... arg0)
{
try
{
if(FinalJSonObject != null)
{
JSONArray jsonArray = null;
try {
jsonArray = new JSONArray(FinalJSonObject);
JSONObject jsonObject;
Student student;
studentList = new ArrayList<Student>();
for(int i=0; i<jsonArray.length(); i++)
{
jsonObject = jsonArray.getJSONObject(i);
student = new Student();
// Adding Student Id TO IdList Array.
IdList.add(jsonObject.getString("id").toString());
//Adding Student Name.
student.StudentName = jsonObject.getString("Regnum").toString();
studentList.add(student);
}
}
catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result)
{
progressBar.setVisibility(View.GONE);
StudentListView.setVisibility(View.VISIBLE);
ListAdapter adapter = new ListAdapter(studentList, context);
StudentListView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
}
private void filterStudents (CharSequence cs) {
List<Student> filteredList = new ArrayList<>();
if (TextUtils.isEmpty(cs)) {
// no text is entered for search, do nothing
return;
}
// build new student list which filtered by search text.
for (Student student : studentList) {
if (student.StudentName.contains(cs)) {
filteredList.add(student);
}
}
// show filtered list in listview
ListAdapter adapter = new ListAdapter(filteredList, this);
StudentListView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}}
And the code from item click:
public class SingleStudent extends AppCompatActivity {
HttpParse httpParse = new HttpParse();
ProgressDialog pDialog;
// Http Url For Filter Student Data from Id Sent from previous activity.
String HttpURL = "http://sissy-nickels.000webhostapp.com/FilterStudentData.php";
// Http URL for delete Already Open Student Record.
String HttpUrlDeleteRecord = "http://sissy-nickels.000webhostapp.com/DeleteStudent.php";
String finalResult ;
HashMap<String,String> hashMap = new HashMap<>();
String ParseResult ;
HashMap<String,String> ResultHash = new HashMap<>();
String FinalJSonObject ;
TextView NAME,SURNAME,DEPT,REGNUM,GRADE;
String NameHolder, SurnameHolder, DeptHolder, RegnumHolder, GradeHolder;
Button UpdateButton, DeleteButton;
String TempItem;
ProgressDialog progressDialog2;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_singlestudent);
NAME = (TextView)findViewById(R.id.name);
SURNAME = (TextView)findViewById(R.id.surname);
DEPT = (TextView)findViewById(R.id.dept);
REGNUM = (TextView)findViewById(R.id.regnum);
GRADE = (TextView)findViewById(R.id.grade);
UpdateButton = (Button)findViewById(R.id.BDel);
DeleteButton = (Button)findViewById(R.id.BUp);
//Receiving the ListView Clicked item value send by previous activity.
TempItem = getIntent().getStringExtra("ListViewValue");
//Calling method to filter Student Record and open selected record.
HttpWebCall(TempItem);
UpdateButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(SingleStudent.this,StudentUpdate.class);
// Sending Student Id, Name, Number and Class to next UpdateActivity.
intent.putExtra("Id", TempItem);
intent.putExtra("name", NameHolder);
intent.putExtra("surname", SurnameHolder);
intent.putExtra("dept", DeptHolder);
intent.putExtra("regnum", RegnumHolder);
intent.putExtra("grade", GradeHolder);
startActivity(intent);
// Finishing current activity after opening next activity.
finish();
}
});
// Add Click listener on Delete button.
DeleteButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// Calling Student delete method to delete current record using Student ID.
StudentDelete(TempItem);
}
});
}
// Method to Delete Student Record
public void StudentDelete(final String StudentID) {
class StudentDeleteClass extends AsyncTask<String, Void, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog2 = ProgressDialog.show(SingleStudent.this, "Φόρτωση", null, true, true);
}
#Override
protected void onPostExecute(String httpResponseMsg) {
super.onPostExecute(httpResponseMsg);
progressDialog2.dismiss();
Toast.makeText(SingleStudent.this, httpResponseMsg.toString(), Toast.LENGTH_LONG).show();
finish();
}
#Override
protected String doInBackground(String... params) {
// Sending STUDENT id.
hashMap.put("StudentID", params[0]);
finalResult = httpParse.postRequest(hashMap, HttpUrlDeleteRecord);
return finalResult;
}
}
StudentDeleteClass studentDeleteClass = new StudentDeleteClass();
studentDeleteClass.execute(StudentID);
}
//Method to show current record Current Selected Record
public void HttpWebCall(final String PreviousListViewClickedItem){
class HttpWebCallFunction extends AsyncTask<String,Void,String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = ProgressDialog.show(SingleStudent.this,"Φόρτωση",null,true,true);
}
#Override
protected void onPostExecute(String httpResponseMsg) {
super.onPostExecute(httpResponseMsg);
pDialog.dismiss();
//Storing Complete JSon Object into String Variable.
FinalJSonObject = httpResponseMsg ;
//Parsing the Stored JSOn String to GetHttpResponse Method.
new GetHttpResponse(SingleStudent.this).execute();
}
#Override
protected String doInBackground(String... params) {
ResultHash.put("StudentID",params[0]);
ParseResult = httpParse.postRequest(ResultHash, HttpURL);
return ParseResult;
}
}
HttpWebCallFunction httpWebCallFunction = new HttpWebCallFunction();
httpWebCallFunction.execute(PreviousListViewClickedItem);
}
// Parsing Complete JSON Object.
private class GetHttpResponse extends AsyncTask<Void, Void, Void>
{
public Context context;
public GetHttpResponse(Context context)
{
this.context = context;
}
#Override
protected void onPreExecute()
{
super.onPreExecute();
}
#Override
protected Void doInBackground(Void... arg0)
{
try
{
if(FinalJSonObject != null)
{
JSONArray jsonArray = null;
try {
jsonArray = new JSONArray(FinalJSonObject);
JSONObject jsonObject;
for(int i=0; i<jsonArray.length(); i++)
{
jsonObject = jsonArray.getJSONObject(i);
// Storing Student Name, Phone Number, Class into Variables.
NameHolder = jsonObject.getString("Name").toString() ;
SurnameHolder = jsonObject.getString("Surname").toString() ;
DeptHolder = jsonObject.getString("Dept").toString() ;
RegnumHolder = jsonObject.getString("Regnum").toString() ;
GradeHolder = jsonObject.getString("Grade").toString() ;
}
}
catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
catch (Exception e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result)
{
// Setting Student Name, Phone Number, Class into TextView after done all process .
NAME.setText(NameHolder);
SURNAME.setText(SurnameHolder);
DEPT.setText(DeptHolder);
REGNUM.setText(RegnumHolder);
GRADE.setText(GradeHolder);
}
}}
Than you in advance!

try this on AllStudents activity
#Override
protected void onResume() {
super.onResume();
if (studentList != null && studentList.size()>0) {
ListAdapter adapter = new ListAdapter(studentList, this);
StudentListView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
}
*Note
when you make a search you run the filterStudents() method
and replace the current list in the adapter
ListAdapter adapter = new ListAdapter(filteredList, this);
but make sure that if you search for nothing .. return the original list
ListAdapter adapter = new ListAdapter(studentList, this);
or you will get an empty list view

You should not recreate from secondActivity. You just finish it when your work is done in secondActivity. Which means, simply you have to do the below in your secondActivity.
#Override
public void onBackPressed() {
super.onBackPressed();
}

Return button to previous activity with BaseAdapter

I currently have two activities doing HTTP requests.
The first activity contains a CustomList class extends BaseAdapter.
On the second, there is a previous button allowing me to return to the first activity.
Returning to the first activity, I would like to be able to recover the state in which I left it. That is to say to be able to find the information which also come from an HTTP request. I would like to find the data "infos_user" which is in the first activity and all the data in the BaseAdapter.
My architecture is as follows: Activity 0 (HTTP request) -> Activity 1 (with BaseAdapter and HTTP request) -> Activity 2 (HTTP request)
I put all the code because I really don't know how can I do this :/
First activity:
public class GetChildrenList extends AppCompatActivity implements View.OnClickListener {
private ArrayList<Child> childrenImeList = new ArrayList<Child>();
private Button btn_previous;
private ListView itemsListView;
private TextView tv_signin_success;
int id = 0;
String infos_user;
String email;
String password;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.get_children_list);
infos_user = (String) getIntent().getSerializableExtra("infos_user");
Intent intent = new Intent(GetChildrenList.this , GetLearningGoalsList.class);
intent.putExtra("username", infos_user);
btn_previous = (Button) findViewById(R.id.btn_previous);
btn_previous.setOnClickListener(this);
tv_signin_success = (TextView) findViewById(R.id.tv_signin_success);
tv_signin_success.setText("Bonjour " + infos_user + "!");
itemsListView = (ListView)findViewById(R.id.list_view_children);
new GetChildrenAsync().execute();
}
class GetChildrenAsync extends AsyncTask<String, Void, ArrayList<Child>> {
private Dialog loadingDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
loadingDialog = ProgressDialog.show(GetChildrenList.this, "Please wait", "Loading...");
}
#Override
protected ArrayList<Child> doInBackground(String... params) {
int age = 0;
email = (String) getIntent().getSerializableExtra("email");
password = (String) getIntent().getSerializableExtra("password");
String first_name = null;
String last_name = null;
try {
SendRequest sr = new SendRequest();
String result = sr.sendHttpRequest("http://" + sr.getIP_ADDRESS() + "/childrenime/list", "GET", true, email, password);
String jsonResult = "{ \"children\":" + result + "}";
Log.d("result1", jsonResult);
//Manage JSON result
JSONObject jsonObject = new JSONObject(jsonResult);
JSONArray childrenArray = jsonObject.getJSONArray("children");
for (int i = 0; i < childrenArray.length(); ++i) {
JSONObject child = childrenArray.getJSONObject(i);
id = child.getInt("id");
first_name = child.getString("first_name");
last_name = child.getString("last_name");
age = child.getInt("age");
String name = first_name + " " + last_name;
childrenImeList.add(new Child(id,name,age));
}
} catch (JSONException e) {
e.printStackTrace();
}
return childrenImeList;
}
#Override
protected void onPostExecute(final ArrayList<Child> childrenListInformation) {
loadingDialog.dismiss();
if(childrenListInformation.size() > 0) {
CustomListChildrenAdapter adapter = new CustomListChildrenAdapter(GetChildrenList.this, childrenListInformation);
itemsListView.setAdapter(adapter);
}
else{
Toast.makeText(getApplicationContext(), "Impossible de récupérer la liste des enfants", Toast.LENGTH_LONG).show();
}
}
}
}
BaseAdapter:
public class CustomListChildrenAdapter extends BaseAdapter implements View.OnClickListener {
private Context context;
private ArrayList<Child> children;
private Button btnChoose;
private TextView childrenName;
private TextView childrenAge;
public CustomListChildrenAdapter(Context context, ArrayList<Child> children) {
this.context = context;
this.children = children;
}
#Override
public int getCount() {
return children.size(); //returns total item in the list
}
#Override
public Object getItem(int position) {
return children.get(position); //returns the item at the specified position
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.layout_list_view_children,null);
childrenName = (TextView)view.findViewById(R.id.tv_childrenName);
childrenAge = (TextView) view.findViewById(R.id.tv_childrenAge);
btnChoose = (Button) view.findViewById(R.id.btn_choose);
btnChoose.setOnClickListener(this);
} else {
view = convertView;
}
btnChoose.setTag(position);
Child currentItem = (Child) getItem(position);
childrenName.setText(currentItem.getChildName());
childrenAge.setText(currentItem.getChildAge() + "");
return view;
}
#Override
public void onClick(View v) {
Integer position = (Integer) v.getTag();
Child item = (Child) getItem(position);
String email = (String) ((Activity) context).getIntent().getSerializableExtra("email");
String password = (String) ((Activity) context).getIntent().getSerializableExtra("password");
Intent intent = new Intent(context, GetLearningGoalsList.class);
intent.putExtra("idChild",item.getId());
intent.putExtra("email",email);
intent.putExtra("password",password);
context.startActivity(intent);
}
}
Second Activity:
public class GetLearningGoalsList extends AppCompatActivity implements View.OnClickListener {
private ArrayList<LearningGoal> childrenLearningList = new ArrayList<LearningGoal>();
private Button btn_previous;
private ListView itemsListView;
String email;
String password;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.get_learning_goals_list);
btn_previous = (Button) findViewById(R.id.btn_previous);
btn_previous.setOnClickListener(this);
itemsListView = (ListView)findViewById(R.id.list_view_learning_goals);
new GetLearningGoalsAsync().execute();
}
#Override
public void onClick(View v) {
Intent myIntent = new Intent(GetLearningGoalsList.this, GetChildrenList.class);
myIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(myIntent);
return;
}
class GetLearningGoalsAsync extends AsyncTask<String, Void, ArrayList<LearningGoal>> {
private Dialog loadingDialog;
#Override
protected void onPreExecute() {
super.onPreExecute();
loadingDialog = ProgressDialog.show(GetLearningGoalsList.this, "Please wait", "Loading...");
}
#Override
protected ArrayList<LearningGoal> doInBackground(String... params) {
int id = 0;
email = (String) getIntent().getSerializableExtra("email");
password = (String) getIntent().getSerializableExtra("password");
int idChild = (int) getIntent().getSerializableExtra("idChild");
String name = null;
String start_date = null;
String end_date = null;
try {
List<BasicNameValuePair> parameters = new LinkedList<BasicNameValuePair>();
parameters.add(new BasicNameValuePair("idchild", Integer.toString(idChild)));
SendRequest sr = new SendRequest();
String result = sr.sendHttpRequest("http://" + sr.getIP_ADDRESS() + "/learningchild/list"+ "?"+ URLEncodedUtils.format(parameters, "utf-8"), "POST", true, email, password);
String jsonResult = "{ \"learningGoals\":" + result + "}";
Log.d("result1", jsonResult);
//Manage JSON result
JSONObject jsonObject = new JSONObject(jsonResult);
JSONArray learningGoalsArray = jsonObject.getJSONArray("learningGoals");
for (int i = 0; i < learningGoalsArray.length(); ++i) {
JSONObject learningGoal = learningGoalsArray.getJSONObject(i);
id = learningGoal.getInt("id");
name = learningGoal.getString("name");
start_date = learningGoal.getString("start_date");
end_date = learningGoal.getString("end_date");
childrenLearningList.add(new LearningGoal(id,name,start_date,end_date));
}
} catch (JSONException e) {
e.printStackTrace();
}
return childrenLearningList;
}
#Override
protected void onPostExecute(final ArrayList<LearningGoal> learningListInformation) {
loadingDialog.dismiss();
if(learningListInformation.size() > 0) {
CustomListLearningGoalAdapter adapter = new CustomListLearningGoalAdapter(GetLearningGoalsList.this, learningListInformation);
itemsListView.setAdapter(adapter);
}
else{
Toast.makeText(getApplicationContext(), "Impossible de récupérer la liste des scénarios de cet enfant", Toast.LENGTH_LONG).show();
}
}
}
}
Thanks for your help.

if you want to maintain GetChildrenList state as it is then just call finish() rather than new intent on previous button click as follow
replace in GetLearningGoalsList
#Override
public void onClick(View v) {
Intent myIntent = new Intent(GetLearningGoalsList.this, GetChildrenList.class);
myIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(myIntent);
return;
}
with
#Override
public void onClick(View v) {
finish();
}

Thread exiting with uncaught exception on a specific function

Im developing an android app that performs add, update, and delete operations on data on a localhosted MySQL Database. Everything is working fine except for the update part. It happens on the activity ViewFeedingSched when im trying to update the data. The app crashes when the update button is pressed or simply when the function for updating is called. The logcat is giving a message: threadid=1: thread exiting with uncaught exception (group=0x41640c80) . I've seen several solutions and they're mostly about not initializing some objects or having null values. I can't seem to find where I have not initialized something. It was working before and I don't know what I've changed with the program. Below is the codes of the ViewFeedingSched class.
EDIT
I've added the codes for the class that goes before the ViewFeedingSched class which is the FeedingSchedList class. It's layout contains a ListView with the data being listed, and an onItemClick method that opens the ViewFeedingSched class whenever an item (data) is clicked.
public class ViewFeedingSched extends AppCompatActivity implements View.OnClickListener {
private EditText editTextSchedNo;
private EditText editTextFeedTime;
private EditText editTextFeedAmt;
private TextView textViewCurrentTimeSet;
private TextView textViewIDSelected;
//private TextView textViewCurrentAmtSet;
private NumberPicker numPickerHr;
private NumberPicker numPickerMin;
//private Spinner spinnerFeedAmt;
ArrayAdapter<CharSequence> adapter;
private Button buttonUpdate;
private Button buttonDelete;
private String id;
private String ftime;
// private String famt;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.view_feeding_sched);
Intent intent = getIntent();
id = intent.getStringExtra(Config.SCHED_ID);
ftime = intent.getStringExtra(Config.FEEDTIME);
//famt = intent.getStringExtra(Config.FEEDAMT);
editTextSchedNo = (EditText) findViewById(R.id.ET_SchedNo);
editTextFeedTime = (EditText) findViewById(R.id.ET_FeedTime);
//editTextFeedAmt = (EditText) findViewById(R.id.ET_FeedAmt);
textViewCurrentTimeSet = (TextView) findViewById(R.id.TV_CurrentTimeSet);
textViewIDSelected = (TextView) findViewById(R.id.TV_PickedSchedID);
//textViewCurrentAmtSet = (TextView) findViewById(R.id.TV_CurrentAmountSet);
buttonUpdate = (Button) findViewById(R.id.BT_UpdateSched);
buttonDelete = (Button) findViewById(R.id.BT_DeleteSched);
buttonUpdate.setOnClickListener(this);
buttonDelete.setOnClickListener(this);
textViewIDSelected.setText(id);
textViewCurrentTimeSet.setText(ftime);
//textViewCurrentAmtSet.setText(famt);
numPickerHr = (NumberPicker) findViewById(R.id.NP_Hour);
numPickerHr.setMinValue(0);
numPickerHr.setMaxValue(23);
numPickerHr.setWrapSelectorWheel(true);
numPickerMin = (NumberPicker) findViewById(R.id.NP_Min);
numPickerMin.setMinValue(0);
numPickerMin.setMaxValue(59);
numPickerMin.setWrapSelectorWheel(true);
//spinnerFeedAmt = (Spinner) findViewById(R.id.SP_FeedAmt);
//adapter = ArrayAdapter.createFromResource(this,R.array.FeedAmt,android.R.layout.simple_spinner_item);
//spinnerFeedAmt.setAdapter(adapter);
getSchedule();
}
private void getSchedule(){
class GetSchedule extends AsyncTask<Void,Void,String>{
ProgressDialog loading;
#Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(ViewFeedingSched.this,"Fetching...","Wait...",false,false);
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
showSchedule(s);
}
#Override
protected String doInBackground(Void... params) {
RequestHandler rh = new RequestHandler();
String s = rh.sendGetRequestParam(Config.URL_GET_SCHED,id);
return s;
}
}
GetSchedule ge = new GetSchedule();
ge.execute();
}
private void showSchedule(String json){
try {
JSONObject jsonObject = new JSONObject(json);
JSONArray result = jsonObject.getJSONArray(Config.TAG_JSON_ARRAY);
JSONObject c = result.getJSONObject(0);
String feedtime = c.getString(Config.TAG_FEEDTIME);
String feedamt = c.getString(Config.TAG_FEEDAMT);
//editTextFeedTime.setText(feedtime);
// editTextFeedAmt.setText(feedamt);
textViewCurrentTimeSet.setText(feedtime);
// String spinnerVal = String.valueOf(spinnerFeedAmt.getSelectedItem().toString());
} catch (JSONException e) {
e.printStackTrace();
}
}
private void updateSchedule(){
final String feedtime = editTextFeedTime.getText().toString().trim();
final String feedamt = editTextFeedAmt.getText().toString().trim();
final String NP_FeedTime_HR = String.valueOf(numPickerHr.getValue()).trim();
final String NP_FeedTime_MIN = String.valueOf(numPickerMin.getValue()).trim();
//final String SP_FeedAmt = spinnerFeedAmt.getSelectedItem().toString().trim();
class UpdateSchedule extends AsyncTask<Void,Void,String>{
ProgressDialog loading;
#Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(ViewFeedingSched.this,"Updating...","Wait...",false,false);
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
Toast.makeText(ViewFeedingSched.this,s,Toast.LENGTH_LONG).show();
}
#Override
protected String doInBackground(Void... params) {
HashMap<String,String> hashMap = new HashMap<>();
hashMap.put(Config.KEY_SCHED_ID,id);
hashMap.put(Config.KEY_FEED_TIME,NP_FeedTime_HR+":"+NP_FeedTime_MIN+":00");
hashMap.put(Config.KEY_FEED_AMT,feedamt);
RequestHandler rh = new RequestHandler();
String s = rh.sendPostRequest(Config.URL_UPDATE_SCHED,hashMap);
return s;
}
}
UpdateSchedule ue = new UpdateSchedule();
ue.execute();
}
private void deleteSchedule(){
class DeleteSchedule extends AsyncTask<Void,Void,String> {
ProgressDialog loading;
#Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(ViewFeedingSched.this, "Updating...", "Wait...", false, false);
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
Toast.makeText(ViewFeedingSched.this, s, Toast.LENGTH_LONG).show();
}
#Override
protected String doInBackground(Void... params) {
RequestHandler rh = new RequestHandler();
String s = rh.sendGetRequestParam(Config.URL_DELETE_SCHED, id);
return s;
}
}
DeleteSchedule de = new DeleteSchedule();
de.execute();
}
private void confirmDeleteSchedule(){
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
alertDialogBuilder.setMessage("Are you sure you want to delete this schedule?");
alertDialogBuilder.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface arg0, int arg1) {
deleteSchedule();
startActivity(new Intent(ViewFeedingSched.this,FeedingScheduleList.class));
}
});
alertDialogBuilder.setNegativeButton("No",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface arg0, int arg1) {
}
});
AlertDialog alertDialog = alertDialogBuilder.create();
alertDialog.show();
}
#Override
public void onClick(View v) {
if(v == buttonUpdate){
updateSchedule();
}
if(v == buttonDelete){
confirmDeleteSchedule();
}
}
}
FeedingSchedList class
public class FeedingScheduleList extends AppCompatActivity implements ListView.OnItemClickListener{
private ListView listView;
private String JSON_STRING;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.feeding_schedule_list);
listView = (ListView) findViewById(R.id.FeedSchedListView);
listView.setOnItemClickListener(this);
getJSON();
}
private void showFeedSched(){
JSONObject jsonObject = null;
ArrayList<HashMap<String,String>> list = new ArrayList<HashMap<String, String>>();
try {
jsonObject = new JSONObject(JSON_STRING);
JSONArray result = jsonObject.getJSONArray(Config.TAG_JSON_ARRAY);
for(int i = 0; i<result.length(); i++){
JSONObject jo = result.getJSONObject(i);
String id = jo.getString(Config.TAG_ID);
String feedtime = jo.getString(Config.TAG_FEEDTIME);
String feedamt = jo.getString(Config.TAG_FEEDAMT);
HashMap<String,String> schedules = new HashMap<>();
schedules.put(Config.TAG_ID,id+" ");
schedules.put(Config.TAG_FEEDTIME,feedtime+" ");
schedules.put(Config.TAG_FEEDAMT,feedamt+" ");
list.add(schedules);
}
} catch (JSONException e) {
e.printStackTrace();
}
ListAdapter adapter = new SimpleAdapter(
FeedingScheduleList.this, list, R.layout.list_item,
new String[]{Config.TAG_ID,Config.TAG_FEEDTIME,Config.TAG_FEEDAMT},
new int[]{R.id.SchedID, R.id.FeedSchedTime,R.id.FeedAmt});
listView.setAdapter(adapter);
}
private void getJSON() {
class GetJSON extends AsyncTask<Void, Void, String> {
ProgressDialog loading;
#Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(FeedingScheduleList.this, "Fetching Data", "Wait...", false, false);
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
JSON_STRING = s;
showFeedSched();
}
#Override
protected String doInBackground(Void... params) {
RequestHandler rh = new RequestHandler();
String s = rh.sendGetRequest(Config.URL_GET_ALL);
return s;
}
}
GetJSON gj = new GetJSON();
gj.execute();
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Intent intent = new Intent(this, ViewFeedingSched.class);
HashMap<String,String> map =(HashMap)parent.getItemAtPosition(position);
String schedID = map.get(Config.TAG_ID).toString();
String feedTime = map.get(Config.TAG_FEEDTIME).toString();
//String feedAmt = map.get(Config.TAG_FEEDAMT).toString();
intent.putExtra(Config.SCHED_ID,schedID);
intent.putExtra(Config.FEEDTIME,feedTime);
//intent.putExtra(Config.FEEDAMT,feedAmt);
startActivity(intent);
}
}

AsyncTask not working inside ViewPager

I am having problem with AsyncTask class inside ViewPager's Fragment.
I have added code like below inside ViewPager's 3rd Fragment:
private View.OnClickListener finishClickListener = new View.OnClickListener() {
#Override
public void onClick(View v) {
UserIdAsyncTask userIdAsyncTask = new UserIdAsyncTask( getActivity(), "URL", "Test", "Value" );
userIdAsyncTask.execute();
Her is my UserIdAsyncTask class:
private class UserIdAsyncTask extends AsyncTask<Void, Void, String> {
String url = "";
String oldpass = "";
String newpass = "";
private Context mContext = null;
private ProgressDialog dialog;
public UserIdAsyncTask( Context context, String url, String oldPass, String newPass ) {
this.mContext = context;
this.url = url;
this.oldpass = oldPass;
this.newpass = newPass;
}
#Override
protected void onPreExecute() {
dialog = ProgressDialog.show(this.mContext, "", "Please wait...");
dialog.setCanceledOnTouchOutside(false);
dialog.show();
}
#Override
protected String doInBackground(Void... params) {
String str = "";
try {
return str;
} catch (Exception e) {
Log.e(ThirdFrag.class.toString(), e.getMessage(), e);
}
return str;
}
#Override
protected void onPostExecute(String response) {
dialog.dismiss();
Intent i = new Intent(getActivity(), ABC.class);
startActivity(i);
getActivity().finish();
}
}
In the given code, onPreExecute() called but doInBackground() never called.
Any ideas anyone? I'm really struggling with this one.

how to show only selected data when spinner value is selected in android?

I have got 3 spinner where data is coming from server, if we click the search button without selecting any spinner then on next activity , it should show all list(all product without condition), but if we select according to 3 spinner then it should show only related item.I am getting all item when clicking search button without selecting anything but i am not getting selected item in next activity .
here is my Search Activity:
public class PMSearchActivity extends AppCompatActivity {
/**
* Id to identity READ_CONTACTS permission request.
*/
private static final int REQUEST_READ_CONTACTS = 0;
// UI references.
private AutoCompleteTextView mEmailView;
private EditText mPasswordView;
private View mProgressView;
private View mLoginFormView;
private ImageButton mtoolbar,pmplus;
private Button mpigeonSearchbtn;
private Spinner pmcountry;
private Spinner pmstrain;
private Spinner pmdistance;
private TextView error_text;
// distance part
ArrayList<String> listItems = new ArrayList<>();
ArrayAdapter<String> adapter;
ArrayList<String> listItems2 = new ArrayList<>();
ArrayAdapter<String> adapter2;
// distance part
ArrayList<String> listItems3 = new ArrayList<>();
ArrayAdapter<String> adapter3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pmsearch);
getSupportActionBar().hide();
pmplus = (ImageButton) findViewById(R.id.plus);
pmplus.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(PMSearchActivity.this, PMAddPigeonActivity.class);
startActivity(intent);
finish();
}
}) ;
mtoolbar = (ImageButton) findViewById(R.id.toolbar_new);
mtoolbar.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
Intent intent = new Intent(PMSearchActivity.this, PMDashboardActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish(); //
return false;
}
});
mpigeonSearchbtn = (Button) findViewById(R.id.pmaddcompanybtn);
mpigeonSearchbtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
attemptLogin();
}
});
mLoginFormView = findViewById(R.id.login_form);
mProgressView = findViewById(R.id.login_progress);
pmcountry = (Spinner) findViewById(R.id.sname);
pmstrain = (Spinner) findViewById(R.id.fbcountry);
pmdistance = (Spinner) findViewById(R.id.pstrain);
error_text = (TextView) findViewById(R.id.error_text);
adapter = new ArrayAdapter<String>(this, R.layout.spinner_layout, R.id.txt, listItems);
pmstrain.setAdapter(adapter);
ListDistanceTask distanceTask = new ListDistanceTask();
distanceTask.execute();
adapter2 = new ArrayAdapter<String>(this, R.layout.spinner_layout, R.id.txt, listItems2);
pmdistance.setAdapter(adapter2);
ListStrainTask strainTask = new ListStrainTask();
strainTask.execute();
adapter3 = new ArrayAdapter<String>(this, R.layout.spinner_layout, R.id.txt, listItems3);
pmcountry.setAdapter(adapter3);
ListCountryTask listCountryTask = new ListCountryTask();
listCountryTask.execute();
}
private void attemptLogin() {
// Reset errors.
// mEmailView.setError(null);
//mPasswordView.setError(null);
// Store values at the time of the login attempt.
String PMcountry = pmcountry.getSelectedItem().toString();
String PMstrains = pmstrain.getSelectedItem().toString();
String PMdistance = pmdistance.getSelectedItem().toString();
boolean cancel = false;
View focusView = null;
// Check for a valid password, if the user entered one.
if (cancel) {
// There was an error; don't attempt login and focus the first
// form field with an error.
focusView.requestFocus();
}
Intent intent = new Intent(PMSearchActivity.this, PMPigeonListingActivity.class);
intent.putExtra("Country_name", PMcountry);
intent.putExtra("Strain_name", PMstrains);
intent.putExtra("Distance_name", PMdistance);
startActivity(intent);
}
public class ListStrainTask extends AsyncTask<Void, Void, Void> {
ArrayList<String> list;
protected ProgressDialog progressDialog;
;
ListStrainTask() {
}
#Override
protected Void doInBackground(Void... params) {
String result = "";
try {
list.add("-Select Strain-");
// Json coding
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(PMSearchActivity.this, "Please wait...", "Fetching data", true, false);
list = new ArrayList<>();
}
#Override
protected void onPostExecute(Void result) {
progressDialog.dismiss();
listItems.addAll(list);
adapter.notifyDataSetChanged();
}
#Override
protected void onCancelled() {
// ml = null;
progressDialog.dismiss();
}
}
// listdistancetask
public class ListDistanceTask extends AsyncTask<Void, Void, Void> {
ArrayList<String> list;
protected ProgressDialog progressDialog;
;
ListDistanceTask() {
}
// Json coding
}
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(PMSearchActivity.this, "Please wait...", "Fetching data", true, false);
list = new ArrayList<>();
}
#Override
protected void onPostExecute(Void result) {
progressDialog.dismiss();
listItems2.addAll(list);
adapter2.notifyDataSetChanged();
}
#Override
protected void onCancelled() {
// ml = null;
progressDialog.dismiss();
}
}
public class ListCountryTask extends AsyncTask<Void, Void, Void> {
ArrayList<String> list;
protected ProgressDialog progressDialog;
;
ListCountryTask() {
}
#Override
protected Void doInBackground(Void... params) {
String result = "";
try {
list.add("-Select Country-");
// Json coding
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(PMSearchActivity.this, "Please wait...", "Fetching data", true, false);
list = new ArrayList<>();
}
#Override
protected void onPostExecute(Void result) {
progressDialog.dismiss();
listItems3.addAll(list);
adapter3.notifyDataSetChanged();
}
#Override
protected void onCancelled() {
// ml = null;
progressDialog.dismiss();
}
}
}
here in PiegonListing activity:
public class PMPigeonListingActivity extends AppCompatActivity {
private Button mpigeonListBtn;
private ImageView mimg3;
private ImageButton mtoolbar;
private String PostCountry;
private String PostStrain;
private String PostDistance;
private Button listpigeonbutton;
private Spinner lsDistance;
private Spinner lsStrain;
private Spinner lsCountry;
private Button lssearchbutton;
private TextView listallbtn;
//Web api url
// distance part
ArrayList<String> listItems = new ArrayList<>();
ArrayAdapter<String> adapter;
ArrayList<String> listItems2 = new ArrayList<>();
ArrayAdapter<String> adapter2;
// distance part
ArrayList<String> listItems3 = new ArrayList<>();
ArrayAdapter<String> adapter3;
//Tag values to read from json
public static final String TAG_IMAGE_URL = "pimage";
public static final String TAG_NAME = "pprice";
public static final String TAG_PID = "pid";
public static final String TAG_PNAME = "pname";
public static final String TAG_PDETAILS = "pdetails";
public static final String TAG_MOBILE = "pmobile";
public static final String TAG_EMAIL = "pemail";
//GridView Object
private GridView gridView;
private GridView gridView2;
//ArrayList for Storing image urls and titles
private ArrayList<String> images;
private ArrayList<String> names;
private ArrayList<Integer> pid;
private ArrayList<String> pname;
private ArrayList<String> pdetails;
private ArrayList<String> pimage;
private ArrayList<String> pmobile;
private ArrayList<String> pemail;
//for inline search
private ArrayList<String> images2;
private ArrayList<String> names2;
private ArrayList<Integer> pid2;
private ArrayList<String> pname2;
private ArrayList<String> pdetails2;
private ArrayList<String> pimage2;
private ArrayList<String> pmobile2;
private ArrayList<String> pemail2;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pmpigeon_listing);
getSupportActionBar().hide();
gridView = (GridView) findViewById(R.id.gridView);
gridView2 = (GridView) findViewById(R.id.gridView);
Bundle extras = getIntent().getExtras();
if (extras != null) {
PostCountry = extras.getString("Country_name");
PostStrain = extras.getString("Strain_name");
PostDistance = extras.getString("Distance_name");
}
images = new ArrayList<>();
names = new ArrayList<>();
pid = new ArrayList<>();
pname = new ArrayList<>();
pdetails = new ArrayList<>();
pmobile = new ArrayList<>();
pemail = new ArrayList<>();
images2 = new ArrayList<>();
names2 = new ArrayList<>();
pid2 = new ArrayList<>();
pname2 = new ArrayList<>();
pdetails2 = new ArrayList<>();
pmobile2 = new ArrayList<>();
pemail2 = new ArrayList<>();
lsStrain = (Spinner) findViewById(R.id.lsStrain);
lsDistance = (Spinner) findViewById(R.id.lsDistance);
lsCountry = (Spinner) findViewById(R.id.lsCountry);
lssearchbutton = (Button) findViewById(R.id.lssearchbutton);
listallbtn = (TextView) findViewById(R.id.listallbtn);
if (PostCountry.equals("Select Country") && PostStrain.equals("Select Strain") && PostDistance.equals("Select Distance")) {
listallbtn.setVisibility(View.GONE);
} else {
listallbtn.setVisibility(View.VISIBLE);
}
//Calling the getData method
getData();
mtoolbar = (ImageButton) findViewById(R.id.toolbar_new);
mtoolbar.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
Intent intent = new Intent(PMPigeonListingActivity.this, PMDashboardActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish(); //
return false;
}
});
lssearchbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (lsCountry.getSelectedItemPosition() != 0 || lsStrain.getSelectedItemPosition() != 0 || lsDistance.getSelectedItemPosition() != 0) {
listallbtn.setVisibility(View.VISIBLE);
} else {
listallbtn.setVisibility(View.GONE);
}
images2.clear();
names2.clear();
pid2.clear();
pname2.clear();
pdetails2.clear();
pmobile2.clear();
pemail2.clear();
filter();
}
});
listallbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (lsCountry.getSelectedItemPosition() != 0 || lsStrain.getSelectedItemPosition() != 0 || lsDistance.getSelectedItemPosition() != 0) {
listallbtn.setVisibility(View.VISIBLE);
} else {
listallbtn.setVisibility(View.GONE);
}
lsCountry.setSelection(0);
lsStrain.setSelection(0);
lsDistance.setSelection(0);
images2.clear();
names2.clear();
pid2.clear();
pname2.clear();
pdetails2.clear();
pmobile2.clear();
pemail2.clear();
filter();
}
});
// button list
listpigeonbutton = (Button) findViewById(R.id.listpigeonbutton);
listpigeonbutton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(PMPigeonListingActivity.this, PMAddPigeonActivity.class);
startActivity(intent);
}
});
adapter = new ArrayAdapter<String>(this, R.layout.spinner_small, R.id.txt, listItems);
lsStrain.setAdapter(adapter);
ListDistanceTask distanceTask = new ListDistanceTask();
distanceTask.execute();
adapter2 = new ArrayAdapter<String>(this, R.layout.spinner_small, R.id.txt, listItems2);
lsDistance.setAdapter(adapter2);
ListStrainTask strainTask = new ListStrainTask();
strainTask.execute();
adapter3 = new ArrayAdapter<String>(this, R.layout.spinner_small, R.id.txt, listItems3);
lsCountry.setAdapter(adapter3);
ListCountryTask listCountryTask = new ListCountryTask();
listCountryTask.execute();
}
private void getData() {
//Showing a progress dialog while our app fetches the data from url
final ProgressDialog loading = ProgressDialog.show(this, "Please wait...", "Fetching data...", false, false);
String DATA_URL = "http://......searchPigeonList";
StringRequest stringRequest = new StringRequest(Request.Method.POST, DATA_URL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
//Toast.makeText(PMPigeonListingActivity.this,response,Toast.LENGTH_LONG).show();
loading.dismiss();
try {
JSONArray json = new JSONObject(response).getJSONArray("pigeon_list");
for (int i = 0; i < json.length(); i++) {
JSONObject obj = null;
try {
obj = json.getJSONObject(i);
pid.add(obj.getInt("id"));
pname.add(obj.getString("pigeon_name"));
pdetails.add(obj.getString("pigeon_details"));
pmobile.add(obj.getString("usr_mobile"));
pemail.add(obj.getString("usr_email"));
images.add(obj.getString("image"));
names.add(obj.getString("pigeon_price"));
} catch (JSONException e) {
e.printStackTrace();
}
}
}catch(JSONException je){
je.printStackTrace();
}catch(Exception e){
e.printStackTrace();
}
Log.d("Test",response);
//Creating GridViewAdapter Object
PMPigeonListAdapter pmpigeonlistadapter = new PMPigeonListAdapter(getApplicationContext(), images, names, pid, pdetails, pmobile, pemail, pname);
//Adding adapter to gridview
gridView.setAdapter(pmpigeonlistadapter);
pmpigeonlistadapter.notifyDataSetChanged();
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
//Toast.makeText(PMPigeonListingActivity.this, error.toString(), Toast.LENGTH_LONG).show();
}
}) {
#Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("country", PostCountry);
params.put("strain", PostStrain);
params.put("distance", PostDistance);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(this);
requestQueue.add(stringRequest);
}
private void filter() {
//Showing a progress dialog while our app fetches the data from url
final ProgressDialog loading = ProgressDialog.show(this, "Please wait...", "Fetching data...", false, false);
String DATA_URL = "http://......hPigeonList";
final String lstrain = lsStrain.getSelectedItem().toString();
final String ldistance = lsDistance.getSelectedItem().toString();
final String lcountry = lsCountry.getSelectedItem().toString();
StringRequest stringRequest = new StringRequest(Request.Method.POST, DATA_URL,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
//Toast.makeText(PMPigeonListingActivity.this,response,Toast.LENGTH_LONG).show();
loading.dismiss();
try {
JSONArray json = new JSONObject(response).getJSONArray("pigeon_list");
for (int i = 0; i < json.length(); i++) {
JSONObject obj = null;
try {
obj = json.getJSONObject(i);
pid2.add(obj.getInt("id"));
pname2.add(obj.getString("pigeon_name"));
pdetails2.add(obj.getString("pigeon_details"));
pmobile2.add(obj.getString("usr_mobile"));
pemail2.add(obj.getString("usr_email"));
images2.add(obj.getString("image"));
names2.add(obj.getString("pigeon_price"));
} catch (JSONException e) {
e.printStackTrace();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
//Creating GridViewAdapter Object
PMPigeonSearchInlineAdapter pmPigeonSearchInlineAdapter = new PMPigeonSearchInlineAdapter(getApplicationContext(), images2, names2, pid2, pdetails2, pmobile2, pemail2, pname2);
//Adding adapter to gridview
pmPigeonSearchInlineAdapter.notifyDataSetChanged();
gridView2.setAdapter(pmPigeonSearchInlineAdapter);
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(PMPigeonListingActivity.this, error.toString(), Toast.LENGTH_LONG).show();
}
}) {
#Override
protected Map<String, String> getParams() {
Map<String, String> params2 = new HashMap<String, String>();
params2.put("country", lcountry);
params2.put("strain", lstrain);
params2.put("distance", ldistance);
return params2;
}
};
RequestQueue requestQueue2 = Volley.newRequestQueue(this);
gridView2.setAdapter(null);
requestQueue2.add(stringRequest);
}
public class ListStrainTask extends AsyncTask<Void, Void, Void> {
// some coding
}
// listdistancetask
public class ListDistanceTask extends AsyncTask<Void, Void, Void> {
// some coding
}
#Override
protected void onPostExecute(Void result) {
progressDialog.dismiss();
listItems2.addAll(list);
adapter2.notifyDataSetChanged();
ArrayAdapter<String> array_spinner = (ArrayAdapter<String>) lsDistance.getAdapter();
lsDistance.setSelection(array_spinner.getPosition(PostDistance));
}
#Override
protected void onCancelled() {
// ml = null;
progressDialog.dismiss();
}
}
public class ListCountryTask extends AsyncTask<Void, Void, Void> {
ArrayList<String> list;
protected ProgressDialog progressDialog;
;
ListCountryTask() {
}
#Override
protected Void doInBackground(Void... params) {
String result = "";
try {
list.add("Select Country");
// some coding
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
protected void onPreExecute() {
super.onPreExecute();
progressDialog = ProgressDialog.show(PMPigeonListingActivity.this, "Please wait...", "Fetching data", true, false);
list = new ArrayList<>();
}
#Override
protected void onPostExecute(Void result) {
progressDialog.dismiss();
listItems3.addAll(list);
adapter3.notifyDataSetChanged();
ArrayAdapter<String> array_spinner = (ArrayAdapter<String>) lsCountry.getAdapter();
lsCountry.setSelection(array_spinner.getPosition(PostCountry));
}
#Override
protected void onCancelled() {
// ml = null;
progressDialog.dismiss();
}
}
}
In Pigeon listing activity there is 1 option like search activity where user can search without selecting any item just like in search activity.

Set listeners for each of your spinners
setOnItemSelectedListener
In onItemSelected method , get the selected value in a variable and pass on these values to next activity.
E.g.
yourSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
String yourValue = yourSpinner.getSelectedItem().toString();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});