Can't update Item from RecycleView using a Custom Adapter and Listener - firebase-realtime-database

Question

I have an updateTask method which opens an alert dialog. I am trying to call this method through a listener in the onBindViewHolder function in my custom adapter.
However my alert dialog does not pop up and while debugging I found out that my update task method is not called.
Please help me understand why.
Thanks
Here is my customAdapter:
public class TasksAdapter extends RecyclerView.Adapter<TasksAdapter.TaskViewHolder> {
private ArrayList<Model> tasks;
private TaskUpdateListener listener;
TasksAdapter(ArrayList<Model> tasks,TaskUpdateListener listener) {
this.tasks = tasks;
this.listener = listener;
}
#Override
public TaskViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.retrieved_layout, parent, false);
return new TaskViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull TaskViewHolder holder, int position) {
Model task = tasks.get(position);
holder.setDate(task.getDate());
holder.setTask(task.getTask());
holder.setDesc(task.getDescription());
holder.mView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String taskString = task.getTask();
String descString = task.getDescription();
listener.onTaskUpdate(task, position);
}
});
}
#Override
public int getItemCount() {
return tasks.size();
}
public static class TaskViewHolder extends RecyclerView.ViewHolder {
View mView;
public TaskViewHolder(#NonNull View itemView) {
super(itemView);
mView = itemView;
}
public void setTask(String task) {
TextView taskTextView = mView.findViewById(R.id.taskTv);
taskTextView.setText(task);
}
public void setDesc(String desc) {
TextView descTextView = mView.findViewById(R.id.descriptionTv);
descTextView.setText(desc);
}
public void setDate(String date) {
TextView dateTextView = mView.findViewById(R.id.dateTv);
}
}
public interface TaskUpdateListener {
void onTaskUpdate(Model model, int position);
}
}
And here is my HomeActivity:
public class HomeActivity extends AppCompatActivity {
private Toolbar toolbar;
private RecyclerView recyclerView;
private FloatingActionButton floatingActionButton;
private FirebaseDatabase database = FirebaseDatabase.getInstance();
private DatabaseReference userTasksRef;
private FirebaseAuth mAuth;
private FirebaseUser mUser;
private String onlineUserID;
private ProgressDialog loader;
private String key = "";
private String task;
private String description;
#Override
public void onBackPressed(){
new AlertDialog.Builder(this)
.setMessage("Are you sure you want exit ?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
})
.setNegativeButton("No", null)
.show();
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_home);
toolbar = findViewById(R.id.homeToolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("Todo List App");
mAuth = FirebaseAuth.getInstance();
recyclerView = findViewById(R.id.recyclerView);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setReverseLayout(true);
linearLayoutManager.setStackFromEnd(true);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(linearLayoutManager);
loader = new ProgressDialog(this);
mUser = mAuth.getCurrentUser();
onlineUserID = mUser.getUid();
database = FirebaseDatabase.getInstance("https://todolist-bbccd-default-rtdb.europe-west1.firebasedatabase.app");
userTasksRef = database.getReference("users").child(onlineUserID).child("tasks");
floatingActionButton = findViewById(R.id.fab);
floatingActionButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
addTask();
}
});
}
private void addTask() {
AlertDialog.Builder myDialog = new AlertDialog.Builder(this);
LayoutInflater inflater = LayoutInflater.from(this);
View myView = inflater.inflate(R.layout.input_file, null);
myDialog.setView(myView);
final AlertDialog dialog = myDialog.create();
dialog.setCancelable(false);
final EditText task = myView.findViewById(R.id.task);
final EditText description = myView.findViewById(R.id.description);
Button save = myView.findViewById(R.id.saveBtn);
Button cancel = myView.findViewById(R.id.CancelBtn);
cancel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
save.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String mTask = task.getText().toString().trim();
String mDescription = description.getText().toString().trim();
String id = userTasksRef.push().getKey();
String date = DateFormat.getDateInstance().format(new Date());
if (TextUtils.isEmpty(mTask)) {
task.setError("Task Required");
return;
}
if (TextUtils.isEmpty(mDescription)) {
description.setError("Description Required");
return;
} else {
loader.setMessage("Adding your data");
loader.setCanceledOnTouchOutside(false);
loader.show();
Model model = new Model(mTask, mDescription, id, date);
userTasksRef.child(id).setValue(model).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
if (task.isSuccessful()) {
Toast.makeText(HomeActivity.this, "Task has been inserted successfully", Toast.LENGTH_SHORT).show();
loader.dismiss();
} else {
String error = task.getException().toString();
Toast.makeText(HomeActivity.this, "Failed: " + error, Toast.LENGTH_SHORT).show();
loader.dismiss();
}
}
});
}
dialog.dismiss();
}
});
dialog.show();
}
#Override
protected void onStart() {
super.onStart();
ArrayList<Model> tasks = new ArrayList<>();
userTasksRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot taskSnapshot : dataSnapshot.getChildren()) {
Model task = taskSnapshot.getValue(Model.class);
tasks.add(task);
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
// Handle errors here
}
});
TasksAdapter.TaskUpdateListener listener = new TasksAdapter.TaskUpdateListener() {
#Override
public void onTaskUpdate(Model model, int position) {
updateTask(model, position);
}
};
TasksAdapter adapter = new TasksAdapter(tasks, listener);
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
public void updateTask(Model task, final int position ) {
AlertDialog.Builder myDialog = new AlertDialog.Builder(this);
LayoutInflater inflater = LayoutInflater.from(this);
View view = inflater.inflate(R.layout.update_data, null);
myDialog.setView(view);
final AlertDialog dialog = myDialog.create();
final EditText mTask = view.findViewById(R.id.mEditTextTask);
final EditText mDescription = view.findViewById(R.id.mEditTextDescription);
mTask.setText(task.getTask());
mTask.setSelection(task.getTask().length());
mDescription.setText(task.getDescription());
mDescription.setSelection(task.getDescription().length());
Button delButton = view.findViewById(R.id.btnDelete);
Button updateButton = view.findViewById(R.id.btnUpdate);
updateButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String tasktxt = mTask.getText().toString().trim();
String descriptiontxt = mDescription.getText().toString().trim();
String date = DateFormat.getDateInstance().format(new Date());
Model model = new Model(tasktxt, descriptiontxt, key, date);
userTasksRef.child(key).setValue(model).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
if (task.isSuccessful()){
Toast.makeText(HomeActivity.this, "Data has been updated successfully", Toast.LENGTH_SHORT).show();
}else {
String err = task.getException().toString();
Toast.makeText(HomeActivity.this, "update failed "+err, Toast.LENGTH_SHORT).show();
}
}
});
dialog.dismiss();
}
});
}
}