Develop Reference

Trying to get position of lists throws "java.lang.IndexOutOfBoundsException"

I have two array lists, one for employees, another for their availabilities. The arrays are of different size. I don't see the problem with that when I'm using the array of the larger size in getItemCount():
#Override
public int getItemCount() {
return allEmployees.size();
}
I set recycler view to get all employee items, however my availability is a shorter list. If I have 6 availability's and 12 employees everything goes smooth on the first page as it only shows the 6 employees. But when I scroll down it will crash as there is a 7th employee but no 7th availability.
Recycler View :
public class RecycleViewAdapter extends RecyclerView.Adapter<RecycleViewAdapter.MyViewHolder> {
List<EmployeeModel> allEmployees;
List<AvailabilityModel> allAvailabilitys;
Context context;
public RecycleViewAdapter(List<EmployeeModel> allEmployees, List<AvailabilityModel> allAvailabilitys, Context context) {
this.allAvailabilitys = allAvailabilitys;
this.allEmployees = allEmployees;
this.context = context;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_view_employee, parent, false);
MyViewHolder holder = new MyViewHolder(view);
return holder;
}
#Override
public void onBindViewHolder(#NonNull MyViewHolder holder, int position) {
AvailabilityModel available = allAvailabilitys.get(position);
EmployeeModel employee = allEmployees.get(position);
holder.employeeID.setText(String.valueOf(allEmployees.get(position).getEID()));
holder.firstName.setText(allEmployees.get(position).getfName());
holder.lastName.setText(allEmployees.get(position).getlName());
//holder.position = position;
holder.employee = employee;
holder.editButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(context, EditEmployee.class);
intent.putExtra("Editing", employee);
context.startActivity(intent);
}
});
holder.availabilityButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(context, availability_screen_code.class);
intent.putExtra("Available", employee);
intent.putExtra("Days", available);
context.startActivity(intent);
}
});
holder.parentLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(context, ViewEmployee.class);
intent.putExtra("Viewing", employee);
context.startActivity(intent);
}
});
}
#Override
public int getItemCount() {
return allEmployees.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder{
TextView firstName;
TextView lastName;
TextView employeeID;
int position;
ImageButton editButton;
ImageButton availabilityButton;
EmployeeModel employee;
ConstraintLayout parentLayout;
public MyViewHolder(#NonNull View itemView) {
super(itemView);
firstName = itemView.findViewById(R.id.fNameView);
lastName = itemView.findViewById(R.id.lNameView);
employeeID = itemView.findViewById(R.id.eIDView);
editButton = itemView.findViewById(R.id.imageButton2);
availabilityButton = itemView.findViewById(R.id.imageButton4);
parentLayout = itemView.findViewById(R.id.parentLayout);
}
}
}
Where I'm using the position:
public class availability_screen_code extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
private Spinner mondaySpinner, tuesdaySpinner, wednesdaySpinner, thursdaySpinner, fridaySpinner, saturdaySpinner, sundaySpinner;
// private String mondayChoice, tuesdayChoice, wednesdayChoice, thursdayChoice, fridayChoice, saturdayChoice, sundayChoice;
// private static final boolean [] choices = new boolean[6];
private ImageButton confirmation;
EmployeeDBAssist employeeDB;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.availability_screen);
mondaySpinner = findViewById(R.id.mondaySpinner);
tuesdaySpinner = findViewById(R.id.tuesdaySpinner);
wednesdaySpinner = findViewById(R.id.wednesdaySpinner);
thursdaySpinner = findViewById(R.id.thursdaySpinner);
fridaySpinner = findViewById(R.id.fridaySpinner);
saturdaySpinner = findViewById(R.id.saturdaySpinner);
sundaySpinner = findViewById(R.id.sundaySpinner);
confirmation = findViewById(R.id.confirm);
//this is linked to the recycler which gets an entire list of availability!
Bundle bundle = getIntent().getExtras();
AvailabilityModel available = (AvailabilityModel) getIntent().getSerializableExtra("Days");
EmployeeModel employee = (EmployeeModel) getIntent().getSerializableExtra("Available"); //this is where im using it
employeeDB = new EmployeeDBAssist(availability_screen_code.this);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.availableTimes, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
//monday
mondaySpinner.setAdapter(adapter);
mondaySpinner.setOnItemSelectedListener(this);
String availableString = available.getMonday();
mondaySpinner.setSelection(getIndex(mondaySpinner, availableString));
Toast.makeText(this, availableString, Toast.LENGTH_SHORT).show();
//tuesday
tuesdaySpinner.setAdapter(adapter);
tuesdaySpinner.setOnItemSelectedListener(this);
//wednesday
wednesdaySpinner.setAdapter(adapter);
wednesdaySpinner.setOnItemSelectedListener(this);
//thursday
thursdaySpinner.setAdapter(adapter);
thursdaySpinner.setOnItemSelectedListener(this);
//friday
fridaySpinner.setAdapter(adapter);
fridaySpinner.setOnItemSelectedListener(this);
//saturday
saturdaySpinner.setAdapter(adapter);
saturdaySpinner.setOnItemSelectedListener(this);
//sunday
sundaySpinner.setAdapter(adapter);
sundaySpinner.setOnItemSelectedListener(this);
confirmation.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AvailabilityModel availabilityModel;
try{
availabilityModel = new AvailabilityModel(-1, employee.getEID(), mondaySpinner.getSelectedItem().toString(), tuesdaySpinner.getSelectedItem().toString(), wednesdaySpinner.getSelectedItem().toString(), thursdaySpinner.getSelectedItem().toString(), fridaySpinner.getSelectedItem().toString(), saturdaySpinner.getSelectedItem().toString(), sundaySpinner.getSelectedItem().toString());
EmployeeDBAssist employeeDBAssist = new EmployeeDBAssist(availability_screen_code.this);
employeeDBAssist.updateAvailability(employee.getEID(),mondaySpinner.getSelectedItem().toString(), tuesdaySpinner.getSelectedItem().toString(), wednesdaySpinner.getSelectedItem().toString(), thursdaySpinner.getSelectedItem().toString(), fridaySpinner.getSelectedItem().toString(), saturdaySpinner.getSelectedItem().toString(), sundaySpinner.getSelectedItem().toString());
Toast.makeText(availability_screen_code.this, String.valueOf(employee.getEID()) + " " + mondaySpinner.getSelectedItem().toString()+ " " + tuesdaySpinner.getSelectedItem().toString()+ " " + wednesdaySpinner.getSelectedItem().toString()+ " " + thursdaySpinner.getSelectedItem().toString()+ " " + fridaySpinner.getSelectedItem().toString()+ " " + saturdaySpinner.getSelectedItem().toString()+ " " + sundaySpinner.getSelectedItem().toString(), Toast.LENGTH_SHORT).show();
boolean success = employeeDBAssist.addAvailability(availabilityModel);
}
catch (Exception e){
Toast.makeText(availability_screen_code.this, "Error Setting Availability", Toast.LENGTH_SHORT).show();
}
Intent i = new Intent(availability_screen_code.this,activity_main_code.class);
startActivity(i);
Toast.makeText(availability_screen_code.this, String.valueOf(employee.getEID()) + " " + mondaySpinner.getSelectedItem().toString()+ " " + tuesdaySpinner.getSelectedItem().toString()+ " " + wednesdaySpinner.getSelectedItem().toString()+ " " + thursdaySpinner.getSelectedItem().toString()+ " " + fridaySpinner.getSelectedItem().toString()+ " " + saturdaySpinner.getSelectedItem().toString()+ " " + sundaySpinner.getSelectedItem().toString(), Toast.LENGTH_SHORT).show();
}
});
}
availability table has 2 values and employees 7. In getItemCount I'm using the size of my employee table. However, I need to get the position of my availability so that I can use it in another class. It will only work for the first two entries. Once I scroll down it throws :
java.lang.IndexOutOfBoundsException: Index: 2, Size: 2
Adding an availability for every employee would defeat the purpose of my project. How to solve this with the use of two separate arrays of different size?

You can check whether the corresponding AvailabilityModel exists before calling List#get(), if not, directly assign available to null. At the same time, you also need to perform a null check in intent.putExtra("Available", employee);.

Update I fixed the problem using a little bit of what #perfect puzzle said here's the solution
Here's the recyclerViewAdapter updated code
I first created an if statement to check whether the pointer was below the size of the availability list allAvailabilitys.size(), then created a null check within the intent.putExtra field as per #perfectpuzzle instruction
#Override
public void onBindViewHolder(#NonNull MyViewHolder holder, int position) {
EmployeeModel employee;
AvailabilityModel available = null;
if(position < allAvailabilitys.size()){
available = allAvailabilitys.get(position);
employee = allEmployees.get(position);
holder.employeeID.setText(String.valueOf(allEmployees.get(position).getEID()));
holder.firstName.setText(allEmployees.get(position).getfName());
holder.lastName.setText(allEmployees.get(position).getlName());
holder.employee = employee;
} else{
employee = allEmployees.get(position);
holder.employeeID.setText(String.valueOf(allEmployees.get(position).getEID()));
holder.firstName.setText(allEmployees.get(position).getfName());
holder.lastName.setText(allEmployees.get(position).getlName());
holder.employee = employee;
}
EmployeeModel finalEmployee = employee;
holder.editButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(context, EditEmployee.class);
intent.putExtra("Editing", finalEmployee);
context.startActivity(intent);
}
});
EmployeeModel finalEmployee1 = employee;
AvailabilityModel finalAvailable = available;
holder.availabilityButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(context, availability_screen_code.class);
intent.putExtra("Available", finalEmployee1);
if(finalAvailable!= null){
intent.putExtra("Days", finalAvailable);
}
context.startActivity(intent);
}
});
EmployeeModel finalEmployee2 = employee;
holder.parentLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(context, ViewEmployee.class);
intent.putExtra("Viewing", finalEmployee2);
context.startActivity(intent);
}
});
}
}
Updated use of position
here I also check if available is null and I also created a function to translate a null into the default String used in my spinner.
Bundle bundle = getIntent().getExtras();
AvailabilityModel available = (AvailabilityModel) getIntent().getSerializableExtra("Days");
EmployeeModel employee = (EmployeeModel) getIntent().getSerializableExtra("Available");
employeeDB = new EmployeeDBAssist(availability_screen_code.this);
//setting elements in spinner
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.availableTimes, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
//monday
mondaySpinner.setAdapter(adapter);
//tuesday
tuesdaySpinner.setAdapter(adapter);
//wednesday
wednesdaySpinner.setAdapter(adapter);
//thursday
thursdaySpinner.setAdapter(adapter);
//friday
fridaySpinner.setAdapter(adapter);
//saturday
saturdaySpinner.setAdapter(adapter);
//sunday
sundaySpinner.setAdapter(adapter);
if(available != null){
mondayChoice = getAvailableDay(available.getMonday());
mondaySpinner.setSelection(getIndex(mondaySpinner, mondayChoice));
tuesdayChoice = getAvailableDay(available.getTuesday());
tuesdaySpinner.setSelection(getIndex(tuesdaySpinner, tuesdayChoice));
wednesdayChoice = getAvailableDay(available.getWednesday());
wednesdaySpinner.setSelection(getIndex(wednesdaySpinner, wednesdayChoice));
thursdayChoice = getAvailableDay(available.getThursday());
thursdaySpinner.setSelection(getIndex(thursdaySpinner, thursdayChoice));
fridayChoice = getAvailableDay(available.getFriday());
fridaySpinner.setSelection(getIndex(fridaySpinner, fridayChoice));
saturdayChoice = getAvailableDay(available.getSaturday());
saturdaySpinner.setSelection(getIndex(saturdaySpinner, saturdayChoice));
sundayChoice = getAvailableDay(available.getSunday());
sundaySpinner.setSelection(getIndex(sundaySpinner, sundayChoice));
}
else{
Toast.makeText(this, "null field", Toast.LENGTH_SHORT).show();
}
}
Hope this can help someone out.

Recyclerview only shows 1 item

I have the following code from my app where I am trying to retrieve expenses' items that happened today's day (dd) in the past, more than 2 times, I want to populate those items in a recyclerview.
I get the expected result but only one item at the time, the recyclerview is not showing the list as expected.
I use realtime database.
I am looking for some ideas, please see my code;
//suggestions
databaseReference.addValueEventListener(new ValueEventListener() {
#SuppressLint("NotifyDataSetChanged")
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
suggestions.clear();
int occurrences = 0;
Expense expense1 = new Expense();
for (DataSnapshot dataSnapshot : snapshot.getChildren()) {
Expense expense = dataSnapshot.getValue(Expense.class);
assert expense != null;
if (expense.getDate().substring(0, 2).equals(day) && expense.getDate().substring(6, 10).equals(year)) {
for (Expense e : all_expenses) {
if (!today_expenses.contains(e)) {
suggestions_title.setVisibility(View.VISIBLE);
occurrences = Collections.frequency(all_expenses, e);
expense1 = e;
}
}
}
}
if (occurrences > 2) suggestions.add(expense1);
suggestionsAdapter.notifyDataSetChanged();
if (suggestionsAdapter.getItemCount() == 0) {
suggestions_title.setVisibility(View.INVISIBLE);
}
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
and this below is my adapter class;
public class SuggestionsAdapter extends RecyclerView.Adapter<SuggestionsAdapter.ViewHolder> {
Activity activity;
private final ArrayList<Expense> suggestions;
private String item;
private String category;
private int amount;
FirebaseAuth mAuth;
int totalMonth;
public SuggestionsAdapter(Activity activity, ArrayList<Expense> suggestions) {
this.activity = activity;
this.suggestions = suggestions;
}
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(activity).inflate(R.layout.suggestions, parent, false);
mAuth = FirebaseAuth.getInstance();
monthTotalLimit();
return new ViewHolder(view);
}
#SuppressLint("SetTextI18n")
#Override
public void onBindViewHolder(#NonNull ViewHolder holder, #SuppressLint("RecyclerView") int position) {
final Expense expense = suggestions.get(position);
holder.expense.setText("" + expense.getItem());
holder.add.setOnClickListener(view -> {
item = expense.getItem();
category = expense.getCategory();
amount = expense.getAmount();
updateExpense();
});
}
#Override
public int getItemCount() {
return suggestions.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
private final TextView expense;
private final TextView add;
public ViewHolder(#NonNull View itemView) {
super(itemView);
expense = itemView.findViewById(R.id.expense);
add = itemView.findViewById(R.id.add_suggestion);
}
}
//saving amount for limit check
private void monthTotalLimit() {
final Calendar c = Calendar.getInstance();
#SuppressLint("SimpleDateFormat") DateFormat dateFormat = new SimpleDateFormat("MM");
String month = dateFormat.format(c.getTime());
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference().child("Expenses").child(Objects.requireNonNull(mAuth.getCurrentUser()).getUid());
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
int totalAmount = 0;
for (DataSnapshot ds : snapshot.getChildren()) {
Expense expense = ds.getValue(Expense.class);
//dd-MM-yyyy
assert expense != null;
if (expense.getDate().substring(3, 5).equals(month)) {
totalAmount += expense.getAmount();
totalMonth = totalAmount;
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
}
private void updateExpense() {
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference().child("Expenses").child(Objects.requireNonNull(FirebaseAuth.getInstance().getCurrentUser()).getUid());
AlertDialog.Builder myDialog = new AlertDialog.Builder(activity);
LayoutInflater inflater = LayoutInflater.from(activity);
View myView = inflater.inflate(R.layout.input_layout, null);
myDialog.setView(myView);
final AlertDialog dialog = myDialog.create();
dialog.setCancelable(false);
final EditText mItem = myView.findViewById(R.id.item);
final TextView mDate = myView.findViewById(R.id.date);
final EditText mAmount = myView.findViewById(R.id.amount);
final Calendar c = Calendar.getInstance();
#SuppressLint("SimpleDateFormat") DateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
String date = dateFormat.format(c.getTime());
mItem.setText(item);
mDate.setText(date);
mAmount.setText(String.valueOf(amount));
final Spinner categorySpinner = myView.findViewById(R.id.spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(activity, R.array.Category, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
categorySpinner.setAdapter(adapter);
int spinnerPosition = adapter.getPosition(category);
categorySpinner.setSelection(spinnerPosition);
final Button cancel_btn = myView.findViewById(R.id.cancel_btn);
final Button save_btn = myView.findViewById(R.id.save_btn);
mDate.setOnClickListener(view -> datePicker(mDate));
save_btn.setOnClickListener(view -> {
String itemString = mItem.getText().toString();
String amountString = mAmount.getText().toString();
String spinnerString = categorySpinner.getSelectedItem().toString();
String userInputDate = mDate.getText().toString();
int amountInt;
if (itemString.isEmpty()) {
mItem.setError(activity.getString(R.string.name_required));
mItem.requestFocus();
return;
}
if (amountString.equals("") || amountString.equals("0")) {
mAmount.setError(activity.getString(R.string.amount_required));
mAmount.requestFocus();
return;
} else {
amountInt = Integer.parseInt(amountString);
}
if ((totalMonth + amountInt) > 2000000000) {
mAmount.setError(activity.getString(R.string.monthly_limit));
mAmount.requestFocus();
return;
}
if (spinnerString.equals(activity.getString(R.string.category))) {
Toast.makeText(activity, R.string.category_required, Toast.LENGTH_SHORT).show();
return;
} else {
String id = databaseReference.push().getKey();
Expense expense = new Expense(itemString.toUpperCase(Locale.ROOT), spinnerString, userInputDate, id, amountInt);
assert id != null;
databaseReference.child(id).setValue(expense).addOnCompleteListener(task -> {
if (!task.isSuccessful()) {
Toast.makeText(activity, activity.getString(R.string.input_error) + task.getException(), Toast.LENGTH_SHORT).show();
}
});
}
dialog.dismiss();
});
cancel_btn.setOnClickListener(view -> dialog.dismiss());
dialog.show();
}
private void datePicker(TextView textView) {
Calendar calendar = Calendar.getInstance();
// Get current time
int currentYear = calendar.get(Calendar.YEAR);
int currentMonth = calendar.get(Calendar.MONTH);
int currentDay = calendar.get(Calendar.DAY_OF_MONTH);
// Create listener
#SuppressLint("SetTextI18n") DatePickerDialog.OnDateSetListener listener = (view, year, month, day) -> {
#SuppressLint("DefaultLocale") String dayS = String.format("%02d", day);
#SuppressLint("DefaultLocale") String monthS = String.format("%02d", month + 1);
textView.setText(dayS + "-" + monthS + "-" + year);
};
// Move day as today
calendar.set(Calendar.DAY_OF_MONTH, currentDay);
// Min = time after changes
long minTime = calendar.getTimeInMillis();
// Move day as first day of the month
calendar.set(Calendar.DAY_OF_MONTH, 1);
// Move to next month
calendar.add(Calendar.MONTH, +1);
// Go back one day (so last day of current month)
calendar.add(Calendar.DAY_OF_MONTH, -1);
// Max = current
long maxTime = calendar.getTimeInMillis();
// Create dialog
DatePickerDialog datePickerDialog = new DatePickerDialog(activity,
listener,
currentYear,
currentMonth,
currentDay);
// Set dates
datePickerDialog.getDatePicker().setMinDate(minTime);
datePickerDialog.getDatePicker().setMaxDate(maxTime);
// Show dialog
datePickerDialog.show();
}
}

Your code looks fine and must be fetching multiple items from the firebase database but only one is displayed on the whole screen because in the adapter layout, the height of the parent would be match_parent instead of wrap_content, that's why one item is taking up the whole screen and you can't see the rest of the items. If you even scroll your screen vertically, you will see the other items as well. Just change it to wrap_content and everything will be good to go :)

How to remove item from an ArrayList using a filtered RecyclerView and OnClickListener

Check updates below.
I am making an app for a stair climbing challenge that tracks the date and number of steps taken (user input, not automatic). I have an ArrayList that stored objects containing the following three variables:
String date
Int steps
Instant timeStamp
The app has two input buttons, one for integer step input, and one for date selection. There is a simple method created to filter the visible list by the selected date and a couple of visual indicators of your daily progress vs. the daily goal for flights of stairs for the day.
App screenshot
I am using the Instant variable as a timestamp to try to get around the issue of the OnClickListener selecting the position of the item from the filtered list instead of the corresponding item in the unfiltered list. I do this by using the position reported from the OnClickListener to fetch the timeStamp variable from the associated item in the filtered ArrayList, then compare that timeStamp to the items in the unfiltered ArrayList and fetch the indexOf the matching item.
All filtered ArrayLists show properly in the RecyclerView when you select a date.
The problem comes in removing items. If I add items only to one date, then you can remove and add items as you'd expect.
App function without date change (gif)
If I add to one date, then another, while they display properly, the items will be removed from the correct position but in the date you first added items, regardless of whether that is the currently selected date or not.
App function with changing date (gif)
I feel like I'm missing something relatively simple here and my brain is just too saturated with this project to see it.
Main Activity:
public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
private ExampleAdapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
Date temp_curr_date = Calendar.getInstance().getTime();
SimpleDateFormat df = new SimpleDateFormat("dd-MMM-yyyy");
String sel_date = df.format(temp_curr_date);
String curr_date = df.format(temp_curr_date);
double daily_total;
int progress = 0;
double daily_goal = 7.5;
TextView textView1;
TextView textView2;
TextView textViewFlights;
ProgressBar pb;
List<ExampleItem> mExampleList;
List<ExampleItem> filteredList;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// ----- LOAD SAVED ARRAY LIST -----
loadData();
// ----- SET VARIABLES -----
daily_total = totalOutput(mExampleList, sel_date);
textView1 = findViewById(R.id.total);
textView1.setText(String.valueOf(daily_total));
textViewFlights = findViewById(R.id.flights);
pb = findViewById(R.id.progress_bar);
pb.setProgress(getProgress(mExampleList, sel_date), true);
// ----- BUILD RECYCLERVIEW -----
buildRecyclerView();
filter(sel_date);
// ----- ADD STEPS DIALOGUE -----
setAddStepButton();
// ----- CALENDAR DIALOGUE -----
setDateChangeButton();
}
public double totalOutput(List<ExampleItem> steps, String date) {
try{
int temp_total = 0;
double flight_total;
for (int a = 0; a < steps.size(); a++) {
if (date.equals(steps.get(a).getText1()))
temp_total += steps.get(a).getText2();
}
flight_total = round(temp_total / 16.0, 2);
return flight_total;
} catch (Exception e){
return 0.0;
}
}
public static double round(double value, int places) {
if (places < 0) throw new IllegalArgumentException();
BigDecimal bd = new BigDecimal(value);
bd = bd.setScale(places, RoundingMode.HALF_UP);
return bd.doubleValue();
}
public static int toInt(double value) {
BigDecimal bd = new BigDecimal(value);
bd = bd.setScale(0, RoundingMode.HALF_UP);
return bd.intValue();
}
public static Date getDate(int year, int month, int day) {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.YEAR, year);
cal.set(Calendar.MONTH, month);
cal.set(Calendar.DAY_OF_MONTH, day);
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
return cal.getTime();
}
private void saveData(){
SharedPreferences sharedPreferences = getSharedPreferences("shared preferences", MODE_PRIVATE);
SharedPreferences.Editor editor = sharedPreferences.edit();
Gson gson = new Gson();
String json = gson.toJson(mExampleList);
editor.putString("task list", json);
editor.apply();
}
private void loadData(){
SharedPreferences sharedPreferences = getSharedPreferences("shared preferences", MODE_PRIVATE);
Gson gson = new Gson();
String json = sharedPreferences.getString("task list", null);
Type type = new TypeToken<ArrayList<ExampleItem>>() {}.getType();
mExampleList = gson.fromJson(json, type);
if (mExampleList == null){
mExampleList = new ArrayList<>();
}
}
private int getProgress(List<ExampleItem> steps, String date){
int daily_progress_int;
try{
int temp_progress = 0;
double flight_total;
for (int a = 0; a < steps.size(); a++) {
if (date.compareTo(steps.get(a).getText1()) == 0)
temp_progress += steps.get(a).getText2();
}
flight_total = round(temp_progress / 16.0, 2);
daily_progress_int = toInt((flight_total/daily_goal)*100);
return daily_progress_int;
} catch (Exception e){
return 0;
}
}
private void addProgress(double x, int prog){
int daily_progress_int = toInt((x/daily_goal)*100);
if (progress <= 100-daily_progress_int){
progress = progress + prog;
pb = findViewById(R.id.progress_bar);
pb.setProgress(daily_progress_int, true);
} else if (progress + daily_progress_int > 100){
pb = findViewById(R.id.progress_bar);
pb.setProgress(100, true);
}
}
private void removeProgress(double x, int prog){
int daily_progress_int = toInt((x/daily_goal)*100);
progress = progress - prog;
if (progress <= 100) {
pb = findViewById(R.id.progress_bar);
pb.setProgress(daily_progress_int, true);
} else {
pb = findViewById(R.id.progress_bar);
pb.setProgress(0, true);
}
}
public void addItem(String date, int steps, Instant ts){
mExampleList.add(new ExampleItem(date, steps, ts));
filter(sel_date);
}
public void removeItem(final int position){
final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
View viewInflated = LayoutInflater.from(MainActivity.this).inflate(R.layout.confirm, (ViewGroup) findViewById(android.R.id.content), false);
builder.setCancelable(true);
builder.setView(viewInflated);
builder.setPositiveButton("Yup",
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
mExampleList.remove(position);
mAdapter.notifyDataSetChanged(position);
filter(sel_date);
daily_total = totalOutput(mExampleList, sel_date);
textView1 = findViewById(R.id.total);
textView1.setText(String.valueOf(daily_total));
removeProgress(daily_total,progress);
if (daily_total == 1.0){
textViewFlights.setText("flight");
} else {
textViewFlights.setText("flights");
}
saveData();
}
});
builder.setNegativeButton("Nope", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
public void buildRecyclerView(){
mRecyclerView = findViewById(R.id.recyclerView);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(this);
mAdapter = new ExampleAdapter(mExampleList);
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setAdapter(mAdapter);
mAdapter.setOnItemClickListener(new ExampleAdapter.OnItemClickListener() {
#Override
public void onItemClick(int position) {
Instant test = filteredList.get(position).getTimeStamp();
for (ExampleItem item : mExampleList){
if (test.compareTo(item.getTimeStamp()) == 0){
removeItem(mExampleList.indexOf(item));
}
});
}
public void filter(String text){
filteredList = new ArrayList<>();
for (ExampleItem item : mExampleList){
if (item.getText1().toLowerCase().contains(text.toLowerCase())){
filteredList.add(item);
}
}
mAdapter.filterList(filteredList);
}
public void setAddStepButton(){
FloatingActionButton fab = findViewById(R.id.addSteps);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
View viewInflated = LayoutInflater.from(MainActivity.this).inflate(R.layout.add_steps, (ViewGroup) findViewById(android.R.id.content), false);
// Step input
final EditText input = viewInflated.findViewById(R.id.input);
builder.setView(viewInflated);
// OK Button
builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
if (input.getText().length() != 0) {
try {
int in = Integer.parseInt(String.valueOf(input.getText()));
if (in > 0) {
Instant timeStamp = Instant.now();
addItem(sel_date, in, timeStamp);
dialog.dismiss();
} else {
dialog.cancel();
}
} catch (Exception e) {
dialog.cancel();
}
daily_total = totalOutput(mExampleList, sel_date);
textView1 = findViewById(R.id.total);
textView1.setText(String.valueOf(daily_total));
addProgress(daily_total, progress);
mAdapter.notifyDataSetChanged();
filter(sel_date);
if (daily_total == 1.0){
textViewFlights.setText("flight");
} else {
textViewFlights.setText("flights");
}
saveData();
} else{
dialog.cancel();
}
}
});
// Cancel Button
builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.show();
}
});
}
public void setDateChangeButton(){
FloatingActionButton fabcal = findViewById(R.id.calendarButton);
fabcal.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View view) {
LayoutInflater inflater = (LayoutInflater)getApplicationContext().getSystemService
(Context.LAYOUT_INFLATER_SERVICE);
LinearLayout ll= (LinearLayout)inflater.inflate(R.layout.calendar, null, false);
CalendarView cv = (CalendarView) ll.getChildAt(0);
long milliseconds = 0;
try {
Date d = df.parse(sel_date);
milliseconds = d.getTime();
} catch (ParseException e) {
e.printStackTrace();
}
cv.setDate(milliseconds);
cv.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
#Override
public void onSelectedDayChange(
#NonNull CalendarView view,
int year,
int month,
int dayOfMonth)
{
Date temp_sel_date = getDate(year, month, dayOfMonth);
sel_date = df.format(temp_sel_date);
textView2 = findViewById(R.id.daily_total);
if (sel_date.equals(curr_date)){
textView2.setText("Today");
} else {
String dt_day = (String) DateFormat.format("dd", temp_sel_date);
String dt_month = (String) DateFormat.format("MMM", temp_sel_date);
textView2.setText(dt_month + " " + dt_day);
}
daily_total = totalOutput(mExampleList, sel_date);
textView1 = findViewById(R.id.total);
textView1.setText(String.valueOf(daily_total));
pb = findViewById(R.id.progress_bar);
pb.setProgress(getProgress(mExampleList, sel_date), true);
mAdapter.notifyDataSetChanged();
filter(sel_date);
}
});
new AlertDialog.Builder(MainActivity.this)
.setView(ll)
.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.dismiss();
}
}
).show();
}
});
}
}
Adapter Class:
public class ExampleAdapter extends RecyclerView.Adapter<ExampleAdapter.ExampleViewHolder> {
private static List<ExampleItem> mExampleList;
private static List<ExampleItem> exampleListFull;
private OnItemClickListener mListener;
public interface OnItemClickListener{
void onItemClick(int position);
}
public void setOnItemClickListener(OnItemClickListener listener){
mListener = listener;
}
public static class ExampleViewHolder extends RecyclerView.ViewHolder {
public TextView mTextView1;
public ImageView mDeleteImage;
public ExampleViewHolder(View itemView, final OnItemClickListener listener) {
super(itemView);
mTextView1 = itemView.findViewById(R.id.textView);
mDeleteImage = itemView.findViewById(R.id.image_delete);
mDeleteImage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (listener != null){
int position = getAdapterPosition();
if (position != RecyclerView.NO_POSITION){
Instant test = mExampleList.get(position).getTimeStamp();
for (ExampleItem item : exampleListFull){
int compare = test.compareTo(item.getTimeStamp());
if (compare == 0){
int delIndex = exampleListFull.indexOf(item);
position = delIndex;
}
}
listener.onItemClick(position);
}
}
}
});
}
}
public ExampleAdapter(List<ExampleItem> exampleList){
this.mExampleList = exampleList;
exampleListFull = new ArrayList<>(exampleList);
}
#NonNull
#Override
public ExampleViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int i) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.example_item, parent, false);
ExampleViewHolder evh = new ExampleViewHolder(v, mListener);
return evh;
}
#Override
public void onBindViewHolder(#NonNull ExampleViewHolder holder, int position) {
ExampleItem currentItem = mExampleList.get(position);
if (currentItem.getText2() == 1.0){
holder.mTextView1.setText(currentItem.getText2() + " step");
} else {
holder.mTextView1.setText(currentItem.getText2() + " steps");
}
}
#Override
public int getItemCount() {
return mExampleList.size();
}
public void filterList(List<ExampleItem> filteredList){
mExampleList = filteredList;
notifyDataSetChanged();
}
}
If anyone out there has any ideas, I'd love to hear from you!
UPDATE: The included code now reflects the changes suggested by users and is fully functional.

You should use
mAdapter.notifyDataSetChanged();
Instead of
mAdapter.notifyItemRemoved(position);
For more details Visit
this.

I figured it out, for those interested. Comparing the timestamps was working fine, but I put it in the wrong part of the OnClickListener cycle. It needed to be placed in the MainActivity buildRecyclerView method in the setOnClickListener override. I've updated original code to reflect this change.
Thank you anyone that took the time to look at my post.

maybe it could be better to place the onClickListner in Your adpater-class..so You can control every single card if it should be clickable or not...or if You want to place any Ads between the cards
GGK

how to put a few data into array variable and post as JSONarray?

I'm trying to make a laundry ordering application. I've made it to the order process, at the end of the order process, the user clicks the next button to checkout the ordered results, I have successfully made the checkout results, but what I made is still in one variable string. how to put the checkout results into an array variable so that I can post the results in the form of JSONArray?
HERE IS MY ORDER ACTIVITY CODE :
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_produk);
// menghubungkan variablel pada layout dan pada java
listProduk = (ListView)findViewById(R.id.list_produk);
swipeProduct = (SwipeRefreshLayout)findViewById(R.id.swipeProduct);
radioExpress = (RadioButton)findViewById(R.id.radio_express);
radioReguler = (RadioButton)findViewById(R.id.radio_regular);
tvTotal = (TextView)findViewById(R.id.total);
next = (Button)findViewById(R.id.button_next);
actionBar = getSupportActionBar();
laundry_id = getIntent().getStringExtra(TAG_LAUNDRY_ID);
// untuk mengisi data dari JSON ke dalam adapter
productAdapter = new CheckboxAdapter(this, (ArrayList<ProductModel>) productList, this);
listProduk.setAdapter(productAdapter);
listProduk.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
productAdapter.setCheckBox(position);
}
});
// menampilkan widget refresh
swipeProduct.setOnRefreshListener(this);
swipeProduct.post(new Runnable() {
#Override
public void run() {
swipeProduct.setRefreshing(true);
productList.clear();
tvTotal.setText(String.valueOf(0));
radioReguler.isChecked();
regular = true;
productAdapter.notifyDataSetChanged();
callProduct();
}
}
);
next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String checkbox = "";
for (ProductModel hold : productAdapter.getAllData()) {
int total = Integer.parseInt(hold.getProduct_price())*(hold.getCountProduct());
if (hold.isCheckbox()) {
checkbox += "\n" + hold.getProduct_name() + " " + total;
}
}
if (!checkbox.isEmpty()) {
dipilih = checkbox;
} else {
dipilih = "Anda Belum Memilih Menu.";
}
formSubmit(dipilih);
}
});
}
private void formSubmit(String hasil){
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
LayoutInflater inflater = getLayoutInflater();
View dialogView = inflater.inflate(R.layout.form_submit, null);
dialog.setView(dialogView);
dialog.setIcon(R.mipmap.ic_launcher);
dialog.setTitle("Menu Yang Dipilih");
dialog.setCancelable(true);
txtnamaProduk = (TextView) dialogView.findViewById(R.id.txtNama_produk);
txtnamaProduk.setText(hasil);
dialog.setNeutralButton("CLOSE", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
dialog.show();
}
AND HERE IS THE CODE OF THE RESULT :
next.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
String checkbox = "";
for (ProductModel hold : productAdapter.getAllData()) {
int total = Integer.parseInt(hold.getProduct_price())*(hold.getCountProduct());
if (hold.isCheckbox()) {
checkbox += "\n" + hold.getProduct_name() + " " + total;
}
}
if (!checkbox.isEmpty()) {
dipilih = checkbox;
} else {
dipilih = "Anda Belum Memilih Menu.";
}
formSubmit(dipilih);
}
});
}
in my code above, I still use the variable checkbox to accommodate all the results of the order chosen by the user. how to put all the result into array variable so i can post to server as a JSONArray? Please help me to solve this problem. because i'm still a beginner in android.
HERE IS MY ADAPTER CODE IF NEEDED :
public class CheckboxAdapter extends BaseAdapter{
private Context context;
private ArrayList<ProductModel> productItems;
ProdukLaundry produk;
public CheckboxAdapter(Context context, ArrayList<ProductModel> items, ProdukLaundry produk) {
this.context = context;
this.productItems = items;
this.produk = produk;
}
#Override
public int getItemViewType(int position) {
return position;
}
#Override
public int getCount() {
return productItems.size();
}
#Override
public Object getItem(int position) {
return productItems.get(position);
}
#Override
public long getItemId(int position) {
return 0;
}
#Override
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder viewHolder;
final ProductModel items = productItems.get(position);
if(view == null) {
viewHolder = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.list_produk, null, true);
viewHolder.checkBox = (CheckBox) view.findViewById(R.id.checkBox_productName);
viewHolder.decrease = (TextView) view.findViewById(R.id.decrease_product);
viewHolder.count = (TextView) view.findViewById(R.id.count_product);
viewHolder.increase = (TextView) view.findViewById(R.id.increase_product);
viewHolder.price = (TextView) view.findViewById(R.id.product_price);
view.setTag(viewHolder);
}else{
viewHolder = (ViewHolder) view.getTag();
}
viewHolder.checkBox.setText(items.getProduct_name());
viewHolder.price.setText(items.getProduct_price());
viewHolder.count.setText(String.valueOf(items.getCountProduct()));
//fungsi untuk set posisi textview + dan -
viewHolder.increase.setTag(R.integer.btn_plus_view, view);
viewHolder.increase.setTag(R.integer.btn_plus_pos, position);
viewHolder.decrease.setTag(R.integer.btn_minus_view, view);
viewHolder.decrease.setTag(R.integer.btn_minus_pos, position);
//fungsi untuk disable textview + dan - jika checkbox tidak di klik
viewHolder.decrease.setOnClickListener(null);
viewHolder.increase.setOnClickListener(null);
if(items.isCheckbox()){
viewHolder.checkBox.setChecked(true);
viewHolder.increase.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
View tempview = (View) viewHolder.increase.getTag(R.integer.btn_plus_view);
TextView tv = (TextView) tempview.findViewById(R.id.count_product);
Integer pos = (Integer) viewHolder.increase.getTag(R.integer.btn_plus_pos);
int countProduct = Integer.parseInt(tv.getText().toString()) + 1;
tv.setText(String.valueOf(countProduct));
productItems.get(pos).setCountProduct(countProduct);
produk.tambah(pos);
}
});
viewHolder.decrease.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
View tempview = (View)viewHolder.decrease.getTag(R.integer.btn_minus_view);
TextView tv = (TextView) tempview.findViewById(R.id.count_product);
Integer pos = (Integer) viewHolder.decrease.getTag(R.integer.btn_minus_pos);
int total = productItems.get(pos).getCountProduct();
if (total>0){
int countProduct = Integer.parseInt(tv.getText().toString()) - 1;
tv.setText(String.valueOf(countProduct));
productItems.get(pos).setCountProduct(countProduct);
produk.kurang(pos);
}
}
});
} else {
viewHolder.checkBox.setChecked(false);
//fungsi untuk reset jumlah harga dan produk pada checkbox
String count = viewHolder.count.getText().toString();
int jumlah = Integer.parseInt(count);
int harga = Integer.parseInt(productItems.get(position).getProduct_price());
int kurang = jumlah * harga;
viewHolder.count.setText("0");
productItems.get(position).setCountProduct(0);
produk.kurangCheckbox(kurang);
}
return view;
}
public ArrayList<ProductModel> getAllData(){
return productItems;
}
public void setCheckBox(int position){
ProductModel items = productItems.get(position);
items.setCheckbox(!items.isCheckbox());
notifyDataSetChanged();
}
static class ViewHolder{
TextView decrease, count, increase, price;
CheckBox checkBox;
}
}

just create getter setter method of Arraylist like below
CompleteOrder:-
public class CompleteOrder {
List<OrderItem> order_items;
public List<OrderItem> getOrder_items() {
return order_items;
}
public void setOrder_items(List<OrderItem> order_items) {
this.order_items = order_items;
}
}
Create another Getter setter class of variable you want to add in arraylist
OrderItem:-
public class OrderItem {
String product_name;
int product_total;
public OrderItem(String product_name, int product_total) {
this.product_name = product_name;
this.product_total = product_total;
}
public String getProduct_name() {
return product_name;
}
public void setProduct_name(String product_name) {
this.product_name = product_name;
}
public int getProduct_total() {
return product_total;
}
public void setProduct_total(int product_total) {
this.product_total = product_total;
}
}
Now in your onClick method just create new List as below
public void onClick(View view) {
String checkbox = "";
CompleteOrder completeOrder=new CompleteOrder();
List<OrderItem> masterProductorderCount=new ArrayList<>();
for (ProductModel hold : productAdapter.getAllData()) {
int total = Integer.parseInt(hold.getProduct_price())*(hold.getCountProduct());
if (hold.isCheckbox()) {
checkbox += "\n" + hold.getProduct_name() + " " + total;
masterProductorderCount.add(new OrderItem(holder.getProduct_name(),total);
}
}
completeOrder.setOrder_items(masterProductorderCount);
if (!checkbox.isEmpty()) {
dipilih = checkbox;
} else {
dipilih = "Anda Belum Memilih Menu.";
}
formSubmit(completeOrder);//pass object of CompleteOrder
}
});
CompleteOrder object give JSON output as below
{
"CompleteOrder":[
{
"product_name":"your product name",
"product_total":1
},
{
"product_name":"your product name",
"product_total":1
},
{
"product_name":"your product name",
"product_total":1
}
]
}

make a model that contains product name , total and etc,
then put each data into an object and put each object into an array
finally use Gson to map properties to model / list of models or the other way around.
ArrayList<Model> list = new ArrayList<>();
for (ProductModel hold : productAdapter.getAllData()) {
int total = Integer.parseInt(hold.getProduct_price())*(hold.getCountProduct());
if (hold.isCheckbox()) {
Model model = new Model();
model.productName = hold.getProduct_name();
model.total = total;
list.add(model);
}
}
String jsonArray = Gson().toJson(list);

You need to create a JSONObject for each entry in the JSONArray.
As far as I can see this should take care of it:
public void onClick(View view) {
String checkbox = "";
JSONArray jsonArray = new JSONArray();
for (ProductModel hold : productAdapter.getAllData()) {
int total = Integer.parseInt(hold.getProduct_price())*(hold.getCountProduct());
if (hold.isCheckbox()) {
checkbox += "\n" + hold.getProduct_name() + " " + total;
JSONObject jsonObj = new JSONObject();
jsonObj.put("product_name", hold.getProduct_name());
jsonObj.put("product_total", total);
jsonArray.put(jsonObj);
}
}
if (!checkbox.isEmpty()) {
dipilih = checkbox;
} else {
dipilih = "Anda Belum Memilih Menu.";
}
String jsonArrayString = jsonArray.toString();
formSubmit(dipilih);
}
Depending on your data the resulting string from jsonArrayString would be:
{[
{"product_name":"product1","product_total":1},
{"product_name":"product2","product_total":2},
{"product_name":"product3","product_total":3}
]}
I really do not know what you intend on doing with the JSON data so I just created a String "jsonArrayString".. do what ever you need to with it.

Clear ListView if response is a empty array?

I have two spinners the first one for month and the second for years.I am trying to call a method send_date() if on Item Selected is called for any of the 2 spinners.
So I have two problems:- 1)send_date() gets called twice the first
time it gets the correct data as expected but the 2nd time it returns
a empty array. 2)When I select another month or year the old data does
not get removed that is the list does not refresh.
The following is my code for on Item Selected :-
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
{
int i = spinYear.getSelectedItemPosition();
selected_year = years.get(i);
Log.d("Selection Year",selected_year);
tv_year.setText(selected_year);
try {
send_date();
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
And for the month spinner:-
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
{
int j = spinMonths.getSelectedItemPosition();
selected_month = Months[j];
Date date = null;
try {
date = new SimpleDateFormat("MMMM").parse(selected_month);
} catch (ParseException e) {
e.printStackTrace();
}
Calendar cal = Calendar.getInstance();
cal.setTime(date);
tv_month.setText(String.valueOf(cal.get(Calendar.MONTH)+1));
Log.d("Selection Month",selected_month);
try {
send_date();
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
On response I call the following method for populating the list view with data:-
public void showBS(String response)
{
ParseBS_all pb = new ParseBS_all(response);
pb.parseBS();
bl = new BS_allList(getActivity(),ParseBS_all.doc_no,ParseBS_all.balance,ParseBS_all.total,ParseBS_all.vat,ParseBS_all.profit);
lv_bsall.setAdapter(bl);
}
This is the code for the send_date method:-
//This method is used to send month and year
private void send_date() throws JSONException {
final String year = tv_year.getText().toString();
final String month = tv_month.getText().toString();
StringRequest stringRequest = new StringRequest(Request.Method.POST, SEND_DATE,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
//display.setText("This is the Response : " + response);
String resp = response.toString().trim();
if (resp.equals("Nothing to display"))
{
Toast.makeText(getContext(), "Nothing to Display", Toast.LENGTH_SHORT).show();
// bl.clear();
lv_bsall.setAdapter(bl);
bl.notifyDataSetChanged();
}else
{
Toast.makeText(getContext(), "Response" + response, Toast.LENGTH_LONG).show();
Log.d("RESPONSE for date", response.toString().trim());
showBS(response);
}
}
},
new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
}
}) {
#Override
protected Map<String, String> getParams() throws AuthFailureError {
GlobalClass gvar = (GlobalClass) getActivity().getApplicationContext();
String dbname = gvar.getDbname();
Map<String, String> params = new HashMap<>();
params.put(KEY_DBNAME, dbname);
params.put(KEY_MONTH, month);
params.put(KEY_YEAR,year);
return params;
}
};
RequestQueue requestQ = Volley.newRequestQueue(getContext());
requestQ.add(stringRequest);
}
Adapter code for list view.
public class BS_allList extends ArrayAdapter<String>
{
private String[] doc_no;
private String[] balance;
private String[] total;
private String[] vat;
private String[] profit;
private Activity context;
public BS_allList(Activity context, String[] doc_no, String[]balance, String[] total, String[] vat, String[] profit)
{
super(context, R.layout.bs_list_all, doc_no);
this.context =context;
this.doc_no= doc_no;
this.balance = balance;
this.total = total;
this.vat=vat;
this.profit = profit;
}
#Override
public View getView(int position, View listViewItem, ViewGroup parent)
{
if (null == listViewItem)
{
LayoutInflater inflater = context.getLayoutInflater();
listViewItem = inflater.inflate(R.layout.bs_list_all, null, true);
}
TextView tv_docNo = (TextView) listViewItem.findViewById(R.id.tvdoc_no);
TextView tv_balance = (TextView) listViewItem.findViewById(R.id.tv_balance);
TextView tv_tot = (TextView) listViewItem.findViewById(R.id.tv_total);
TextView tv_vat = (TextView) listViewItem.findViewById(R.id.tv_vat);
TextView tv_pf = (TextView) listViewItem.findViewById(R.id.tv_profit);
tv_docNo.setText(doc_no[position]);
tv_balance.setText(balance[position]);
tv_tot.setText(total[position]);
tv_vat.setText(vat[position]);
tv_pf.setText(profit[position]);
return listViewItem;
}
}
Also note that I have set the spinner to point to the current month and year so the first time it works properly.
I am new to programming so any help or suggestion is appreciated.Thank you.

Hi #AndroidNewBee,
As per our discussion made following changes in your code and you will get proper output and it will resolve your issues.
if (resp.equals("Nothing to display"))
{
Toast.makeText(getContext(), "Nothing to Display", Toast.LENGTH_SHORT).show();
bl = new BS_allList(getActivity(),{""},{""},{""},{""},{""});
lv_bsall.setAdapter(bl);
}
And second is check validation as below,
try {
if((selected_year != null & selected_year.length > 0 ) & (tv_month.getText().toString() != null & tv_month.getText().toString().length > 0))
{
send_date();
}
} catch (JSONException e) {
e.printStackTrace();
}

First you shouldn't be using so many String[], instead wrap them in a class
Class BSDataModel{
private String doc_no;
private String balance;
private String total;
private String vat;
private String profit;
//getters and setters
}
Now the reponse result should be added as in ,it returns List<BSDataModel>
List<BSDataModel> reponseList = new ArrayList<>();
//for example adding single response
for(int i=0;i<jsonArrayResponse.length();i++){
BSDataModel singleResponse = new BSDataModel();
singleResponse.setDocNo(jsonArrayResponse.get(i).getString("doc_no"));
singleResponse.setBalace(jsonArrayResponse.get(i).getString("balance"));
//etc..finall add that single response to responseList
reponseList.add(singleResponse);
}
BS_allList.java
public class BS_allList extends ArrayAdapter<BSDataModel>
{
private List<BSDataModel> bsList;
private Activity context;
public BS_allList(Activity context,List<BSDataModel> bsList)
{
super(context, R.layout.bs_list_all, bsList);
this.context =context;
this.bsList = bsList;
}
#Override
public View getView(int position, View listViewItem, ViewGroup parent)
{
if (null == listViewItem)
{
LayoutInflater inflater = context.getLayoutInflater();
listViewItem = inflater.inflate(R.layout.bs_list_all, null, true);
}
TextView tv_docNo = (TextView) listViewItem.findViewById(R.id.tvdoc_no);
TextView tv_balance = (TextView) listViewItem.findViewById(R.id.tv_balance);
TextView tv_tot = (TextView) listViewItem.findViewById(R.id.tv_total);
TextView tv_vat = (TextView) listViewItem.findViewById(R.id.tv_vat);
TextView tv_pf = (TextView) listViewItem.findViewById(R.id.tv_profit);
BSDataModel bsData = bsList.get(position);
tv_docNo.setText(bsData.getDoc());
tv_balance.setText(bsData.getBalance());
tv_tot.setText(bsData.getTot());
tv_vat.setText(bsData.getVat());
tv_pf.setText(bsData.getPF());
return listViewItem;
}
}
Now in your class
BS_allList bl = new BS_allList(getActivity(),responseList);//which you got above
After receiving new Response
// remove old data
responseList.clear(); // list items in the sense list of array used to populate listview
if(newresponseArray.size() > 0){
for(int i=0;i<newjsonArrayResponse.length();i++){
BSDataModel singleResponse = new BSDataModel();
singleResponse.setDocNo(newjsonArrayResponse.get(i).getString("doc_no"));
singleResponse.setBalace(newjsonArrayResponse.get(i).getString("balance"));
//etc..finall add that single response to responseList
reponseList.add(singleResponse);
}
}
//refresh listview
bl.notifyDataSetChanged();

Try this way,
1. adapter.clear();
2. Add/Remove your list Items.
3. listview.setAdapter(adapter);
4. adapter.notifyDatasetChanged();
this procedure should work.