Develop Reference

bottom Sheet Dialog Crashing

holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//handle item clicks show item details (in bottom sheet)
detailBottomProduct(productModel);
}
});
private void detailBottomProduct(ProductModel productModel) {
final BottomSheetDialog bottomSheetDialog = new BottomSheetDialog(context);
View view = LayoutInflater.from(context).inflate(R.layout.bs_product_details_seller,null);
//init View
ImageView productIconIv = view.findViewById(R.id.productIconIv);
TextView discountNoteTv = view.findViewById(R.id.discountNoteTv);
TextView titleTv = view.findViewById(R.id.titleTv);
TextView descriptionTv = view.findViewById(R.id.descriptionTv);
TextView categoryTv = view.findViewById(R.id.categoryTv);
TextView quantityTv = view.findViewById(R.id.quantityTv);
TextView discountPriceTv = view.findViewById(R.id.discountPriceTv);
TextView priceTv = view.findViewById(R.id.priceTv);
//get Data
final String id = productModel.getProductId();
String uid = productModel.getUid();
String discountAvailable = productModel.getDiscountAvailable();
String discountNote = productModel.getDiscountNote();
String discountPrice = productModel.getDiscountPrice();
String productCategory = productModel.getProductCategory();
String productIcon = productModel.getProductIcon();
final String title = productModel.getProductTitle();
String description = productModel.getProductDescription();
String productQuantity = productModel.getProductQuantity();
String timestamp = productModel.getTimestamp();
String actualPrice = productModel.getProductPrice();
//setData
titleTv.setText(title);
descriptionTv.setText(description);
categoryTv.setText(productCategory);
priceTv.setText("₹ "+ actualPrice);
quantityTv.setText(productQuantity);
discountPriceTv.setText("₹ "+discountPrice);
discountNoteTv.setText(discountNote);
if (discountAvailable.equals("true")){
//product is on discount
discountPriceTv.setVisibility(View.VISIBLE);
discountNoteTv.setVisibility(View.VISIBLE);
priceTv.setPaintFlags(priceTv.getPaintFlags()| Paint.STRIKE_THRU_TEXT_FLAG);
}
else {
//product is not on discount
discountPriceTv.setVisibility(View.GONE);
discountNoteTv.setVisibility(View.GONE);
}
try {
Glide.with(context).load(productIcon).into(productIconIv);
}
catch (Exception e){
productIconIv.setImageResource(R.drawable.ic_add_shopping_primary);
}
//set view
bottomSheetDialog.setContentView(view);
//show dialog
bottomSheetDialog.show(); // app crashed point (Line 173 )
}
Complete Adapter Code:
public class AdapterProductSeller extends
RecyclerView.Adapter<AdapterProductSeller.HolderProductSeller>
implements Filterable {
private Context context;
public ArrayList<ProductModel> productList,filterList;
private FilterProduct filter;
public AdapterProductSeller(Context context, ArrayList<ProductModel> productList) {
this.context = context;
this.productList = productList;
this.filterList = productList;
}
#NonNull
#Override
public HolderProductSeller onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
//inflate layout
View view = LayoutInflater.from(context).inflate(R.layout.row_product_seller,parent,false);
return new HolderProductSeller(view);
}
#Override
public void onBindViewHolder(#NonNull HolderProductSeller holder, int position) {
//getData
ProductModel productModel = productList.get(position);
String id = productModel.getProductId();
String uid = productModel.getUid();
String discountAvailable = productModel.getDiscountAvailable();
String discountNote = productModel.getDiscountNote();
String discountPrice = productModel.getDiscountPrice();
String productCategory = productModel.getProductCategory();
String productIcon = productModel.getProductIcon();
String title = productModel.getProductTitle();
String description = productModel.getProductDescription();
String productQuantity = productModel.getProductQuantity();
String timestamp = productModel.getTimestamp();
String actualPrice = productModel.getProductPrice();
//setData
holder.discountNoteTv.setText(discountNote);
holder.titleTv.setText(title);
holder.quantityTv.setText(productQuantity);
holder.discountPriceTv.setText("₹"+discountPrice);
if (discountAvailable.equals("true")){
//product is on discount
holder.discountPriceTv.setVisibility(View.VISIBLE);
holder.discountNoteTv.setVisibility(View.VISIBLE);
holder.priceTv.setPaintFlags(holder.priceTv.getPaintFlags()| Paint.STRIKE_THRU_TEXT_FLAG);
}
else {
//product is not on discount
holder.discountPriceTv.setVisibility(View.GONE);
holder.discountNoteTv.setVisibility(View.GONE);
}
try {
Glide.with(context).load(productIcon).into(holder.productIconIv);
}
catch (Exception e){
holder.productIconIv.setImageResource(R.drawable.ic_add_shopping_primary);
}
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//handle item clicks show item details (in bottom sheet)
detailBottomProduct(productModel);
}
});
}
private void detailBottomProduct(ProductModel productModel) {
final BottomSheetDialog bottomSheetDialog = new BottomSheetDialog(context);
View view = LayoutInflater.from(context).inflate(R.layout.bs_product_details_seller,null);
//init View
ImageButton backBtn = view.findViewById(R.id.backBtn);
ImageButton editBtn = view.findViewById(R.id.editBtn);
ImageButton deleteBtn = view.findViewById(R.id.deleteBtn);
ImageView productIconIv = view.findViewById(R.id.productIconIv);
TextView discountNoteTv = view.findViewById(R.id.discountNoteTv);
TextView titleTv = view.findViewById(R.id.titleTv);
TextView descriptionTv = view.findViewById(R.id.descriptionTv);
TextView categoryTv = view.findViewById(R.id.categoryTv);
TextView quantityTv = view.findViewById(R.id.quantityTv);
TextView discountPriceTv = view.findViewById(R.id.discountPriceTv);
TextView priceTv = view.findViewById(R.id.priceTv);
//get Data
final String id = productModel.getProductId();
String uid = productModel.getUid();
String discountAvailable = productModel.getDiscountAvailable();
String discountNote = productModel.getDiscountNote();
String discountPrice = productModel.getDiscountPrice();
String productCategory = productModel.getProductCategory();
String productIcon = productModel.getProductIcon();
final String title = productModel.getProductTitle();
String description = productModel.getProductDescription();
String productQuantity = productModel.getProductQuantity();
String timestamp = productModel.getTimestamp();
String actualPrice = productModel.getProductPrice();
//setData
titleTv.setText(title);
descriptionTv.setText(description);
categoryTv.setText(productCategory);
priceTv.setText("₹ "+ actualPrice);
quantityTv.setText(productQuantity);
discountPriceTv.setText("₹ "+discountPrice);
discountNoteTv.setText(discountNote);
if (discountAvailable.equals("true")){
//product is on discount
discountPriceTv.setVisibility(View.VISIBLE);
discountNoteTv.setVisibility(View.VISIBLE);
priceTv.setPaintFlags(priceTv.getPaintFlags()| Paint.STRIKE_THRU_TEXT_FLAG);
}
else {
//product is not on discount
discountPriceTv.setVisibility(View.GONE);
discountNoteTv.setVisibility(View.GONE);
}
try {
Glide.with(context).load(productIcon).into(productIconIv);
}
catch (Exception e){
productIconIv.setImageResource(R.drawable.ic_add_shopping_primary);
}
//set view
bottomSheetDialog.setContentView(view);
//show dialog
bottomSheetDialog.show();
// edit click
editBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
bottomSheetDialog.dismiss();
//open product activity
Intent intent = new Intent(context, EditProductActivity.class);
intent.putExtra("productId",id);
context.startActivity(intent);
}
});
//delete Btn
deleteBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
bottomSheetDialog.dismiss();
//show delete confirm dialog
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("Delete")
.setMessage("Are you sure you want to delete product"+title+"?")
.setPositiveButton("DELETE", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//delete
deleteProduct(id);
}
}).setNegativeButton("NO", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//cancel dialog dismiss
dialog.dismiss();
}
})
.show();
}
});
//back btn
backBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//dismiss bottom sheet
bottomSheetDialog.dismiss();
}
});
}
private void deleteProduct(String id) {
//delete product with string id
FirebaseAuth firebaseAuth = FirebaseAuth.getInstance();
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Sellers");
reference.child(firebaseAuth.getUid()).child("products").child(id).removeValue()
.addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
Toast.makeText(context, "Product Deleted...", Toast.LENGTH_SHORT).show();
}
})
.addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
//failed deleting product
Toast.makeText(context, ""+e.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
#Override
public int getItemCount() {
return productList.size();
}
#Override
public Filter getFilter() {
if (filter == null){
filter = new FilterProduct(this,filterList);
}
return filter;
}
class HolderProductSeller extends RecyclerView.ViewHolder{
/* holds view of recycler view */
private ImageView productIconIv,nextIv;
private TextView discountNoteTv,titleTv,quantityTv,
discountPriceTv,priceTv;
public HolderProductSeller(#NonNull View itemView) {
super(itemView);
productIconIv = itemView.findViewById(R.id.productIconIv);
nextIv = itemView.findViewById(R.id.nextIv);
discountNoteTv = itemView.findViewById(R.id.discountNoteTv);
titleTv = itemView.findViewById(R.id.titleTv);
quantityTv = itemView.findViewById(R.id.quantityTv);
quantityTv = itemView.findViewById(R.id.quantityTv);
discountPriceTv = itemView.findViewById(R.id.discountPriceTv);
priceTv = itemView.findViewById(R.id.priceTv);
}
}
}
When I clicked any items in the appFirebase showing the crashes closed an exception error occursLogcat showing Crashes

Why counter just increase to 1 in firebase?

im trying to increase a visitor counter views when access to read a message, so i made a method called incrementar () and set it where i retrieve info when someone click to open that post. But i dont know why only increase to 1 view in firebase, if i click again it does not increase. should use shared preferences? or there is an other method to increase a counter from firebase?
int views;
int score;
int increment = +1;
DatabaseReference ref;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
setTitle("Chatroom");
threadNameTV = findViewById(R.id.threadNameTV);
newMessageET = findViewById(R.id.newMessageET);
homeButton = findViewById(R.id.homeButton);
sendButton = findViewById(R.id.sendButton);
messagesLV = findViewById(R.id.messagesLV);
final View messageview = getLayoutInflater().inflate(R.layout.messages_listview, null);
messageTV = messageview.findViewById(R.id.messageTV);
mAuth = FirebaseAuth.getInstance();
currentUserId = mAuth.getCurrentUser().getUid();
user = mAuth.getCurrentUser();
mDatabase = FirebaseDatabase.getInstance().getReference();
firebaseUser = mAuth.getCurrentUser();
UsersRef = FirebaseDatabase.getInstance().getReference().child("Users");
UserProfileImageRef = FirebaseStorage.getInstance().getReference().child("profileimage");
threadNameTV.setTextColor(Color.parseColor("#000000"));
if (getIntent() != null && getIntent().getExtras() != null) {
if (getIntent().getExtras().containsKey("messageThreadDetails")) {
messageThread = (MessageThread) getIntent().getSerializableExtra("messageThreadDetails");
threadNameTV.setText(messageThread.title);
getMessages(messageThread.thread_id);
incrementar();
}
} else {
Toast.makeText(this, "No data received", Toast.LENGTH_SHORT).show();
}
homeButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (user != null) {
user = null;
mDatabase = null;
mAuth = null;
Intent intent = new Intent(ChatActivity.this, ThreadsActivity.class);
startActivity(intent);
finish();
} else {
user = null;
mDatabase = null;
mAuth = null;
Toast.makeText(ChatActivity.this, "You need to login", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(ChatActivity.this, IniciarSesion.class);
startActivity(intent);
finish();
}
}
});
sendButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String message = newMessageET.getText().toString();
String user_name = user.getDisplayName();
String profileimage = user.getPhotoUrl().toString();
if (message.isEmpty()) {
Toast.makeText(ChatActivity.this, "Enter Message", Toast.LENGTH_SHORT).show();
} else {
addMessage(message, user_name, profileimage, messageThread.thread_id);
}
}
});
}
public void addMessage(String message, String user_name, String profileimage, String thread_id) {
if (user != null) {
mDatabase.child("Normas").child(thread_id).child("messages").push().setValue(new Message(message, user.getUid(), user_name, profileimage, new SimpleDateFormat("dd-MM-yyyy HH:mm:ss", Locale.US).format(new Date())));
newMessageET.setText("");
} else {
Toast.makeText(this, "No user logged in", Toast.LENGTH_SHORT).show();
}
}
public void getMessages(String thread_id) {
mDatabase.child("Normas").child(thread_id).child("messages").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
messagesList.clear();
for (DataSnapshot messageSnapshot : dataSnapshot.getChildren()) {
Message message = messageSnapshot.getValue(Message.class);
if (message != null) {
message.message_id = messageSnapshot.getKey();
Log.d(TAG, "onDataChange: " + message.toString());
}
messagesList.add(message);
}
messagesAdapter = new MessagesAdapter(ChatActivity.this, R.layout.threads_listview, messagesList, ChatActivity.this);
messagesLV.setAdapter(messagesAdapter);
}
#Override
public void onCancelled(DatabaseError databaseError) {
Toast.makeText(ChatActivity.this, "ChatActivity: " + databaseError.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
#Override
public void deleteMessage(String message_id) {
mDatabase.child("Normas").child(messageThread.thread_id).child("messages").child(message_id).removeValue();
}
public void setimage() {
UsersRef.child(currentUserId).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NotNull DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
if (dataSnapshot.hasChild("profileimage")) {
String image = dataSnapshot.child("profileimage").getValue().toString();
Picasso.with(ChatActivity.this).load(image).placeholder(R.drawable.profilefoto).into(fotoforos);
}
}
}
#Override
public void onCancelled(#NotNull DatabaseError error) {
}
});
}
public void incrementar() {
FirebaseDatabase.getInstance().getReference().child("Normas").child(messageThread.thread_id).child("views").setValue(increment);
}
}
Thanks so much

You're setting +1 as the value each time you call:
int increment = +1;
FirebaseDatabase.getInstance().getReference().child("Normas")
.child(messageThread.thread_id).child("views").setValue(increment);
What would work is:
FirebaseDatabase.getInstance().getReference().child("Normas")
.child(messageThread.thread_id).child("views").setValue(ServerValue.increment(1));
Instead of sending the literal value 1, this second snippet sends an instruction to increment the current value by 1.

Delete message in chat activity nothing happen

I am trying to make android app for chatting when I send message done see it done but when I am trying to delete It nothing happens ... this is my adapter chat ... dialog message appear but when I am clicking on delete nothing happen ... when i am click on no dismiss dialog happen it is fine ... but nothing with delete ... any one can help me please ?
public class AdapterChat extends RecyclerView.Adapter<AdapterChat.MyHolder> {
private static final int MSG_TYPE_LEFT = 0;
private static final int MSG_TYPE_RIGHT = 1;
Context context;
List<Modelchat> chatList;
String imageUrl;
FirebaseUser fUser;
public AdapterChat(Context context, List<Modelchat> chatList, String imageUrl) {
this.context = context;
this.chatList = chatList;
this.imageUrl = imageUrl;
}
#NonNull
#Override
public MyHolder onCreateViewHolder(#NonNull ViewGroup viewGroup, int i) {
if (i == MSG_TYPE_RIGHT) {
View view = LayoutInflater.from(context).inflate(R.layout.row_chat_right, viewGroup, false);
return new MyHolder(view);
} else {
View view = LayoutInflater.from(context).inflate(R.layout.row_chat_left, viewGroup, false);
return new MyHolder(view);
}
}
#Override
public void onBindViewHolder(#NonNull MyHolder myHolder, final int i) {
String message = chatList.get(i).getMessage();
String timeStamp = chatList.get(i).getTimestamp();
Calendar cal = Calendar.getInstance(Locale.ENGLISH);
cal.setTimeInMillis(Long.parseLong(timeStamp));
String dataTime = DateFormat.format("dd/MM/yyyy hh:mm aa", cal).toString();
myHolder.messageTv.setText(message);
myHolder.timeTv.setText(dataTime);
try {
Picasso.get().load(imageUrl).into(myHolder.profileTv);
} catch (Exception e) {
}
//show delete dialog message
myHolder.messageLAyout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("Delete");
builder.setMessage("Are you sure to delete this message?");
builder.setPositiveButton("Delete", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
deleteMessage(i);
}
});
builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.create().show();
}
});
if (i == chatList.size() - 1) {
if (chatList.get(i).isSeen()) {
myHolder.isSeenTv.setText("Seen");
} else {
myHolder.isSeenTv.setText("Delivered");
}
} else {
myHolder.isSeenTv.setVisibility(View.GONE);
}
}
private void deleteMessage(int position) {
String myUID = FirebaseAuth.getInstance().getCurrentUser().getUid();
String msgTimeStamp = chatList.get(position).getTimestamp();
DatabaseReference dbRef = FirebaseDatabase.getInstance().getReference("Chats");
Query query = dbRef.orderByChild("timestamp").equalTo(msgTimeStamp);
query.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot ds : dataSnapshot.getChildren()) {
if (ds.child("sender").getValue().equals(myUID)) {
// ds.getRef().removeValue();
HashMap<String, Object> hashMap = new HashMap<>();
hashMap.put("message", "This message was deleted...");
ds.getRef().updateChildren(hashMap);
chatList.remove(i);
notifyItemRemoved(i);
notifyItemRangeChanged(i, chatList.size());
Toast.makeText(context, "message deleted...", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(context, "You can delete only your messages...", Toast.LENGTH_SHORT).show();
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
#Override
public int getItemCount() {
return chatList.size();
}
#Override
public int getItemViewType(int position) {
fUser = FirebaseAuth.getInstance().getCurrentUser();
if (chatList.get(position).getSender().equals(fUser.getUid())) {
return MSG_TYPE_RIGHT;
} else {
return MSG_TYPE_LEFT;
}
}
class MyHolder extends RecyclerView.ViewHolder {
ImageView profileTv;
TextView messageTv, timeTv, isSeenTv;
LinearLayout messageLAyout;
public MyHolder(#NonNull View itemView) {
super(itemView);
profileTv = itemView.findViewById(R.id.profileTv);
messageTv = itemView.findViewById(R.id.messageTv);
timeTv = itemView.findViewById(R.id.timeTv);
isSeenTv = itemView.findViewById(R.id.isSeenTv);
messageLAyout = itemView.findViewById(R.id.messageLayout);
}
}
}
Emulator

I assume by delete you mean changing the text of the message to "This message was deleted...", if that is the case then the issue is that you update the database and don't update the object in the list:
Do this in deleteMessage(int position) function:
....
....
if (ds.child("sender").getValue().equals(myUID)) {
//ds.getRef().removeValue();
HashMap<String, Object> hashMap = new HashMap<>();
hashMap.put("message", "This message was deleted...");
ds.getRef().updateChildren(hashMap);
Toast.makeText(context, "message deleted...", Toast.LENGTH_SHORT).show();
//here add these lines to update the list value.........
chatList.get(position).setMessage("This message was deleted...");
notifyDataSetChanged();
......
......

Just delete message success remove that position from list and notifyItemRemoved() try following code
if (ds.child("sender").getValue().equals(myUID)) {
// ds.getRef().removeValue();
HashMap<String, Object> hashMap = new HashMap<>();
hashMap.put("message", "This message was deleted...");
ds.getRef().updateChildren(hashMap);
chatList.remove(position);
notifyItemRemoved(position);
notifyItemRangeChanged(position, chatList.size());
Toast.makeText(context, "message deleted...", Toast.LENGTH_SHORT).show();
}

First and last switch button getting triggred in recycler view

Hi I have switch button (switchTaskFinished) on my recycler view,when I am clicking any button, the last button is getting selected. Also when I press button it updates the data to firebase. And changes the button status accordingly. But even though buttons value is true it only updates last button status not others.
public class MyAdaptorUser extends RecyclerView.Adapter<MyAdaptorUser.myViewHolder> {
private Context context;
private ArrayList<TaskModel> taskLists;
private Switch switchTaskFinished;
private OnTaskClickListner mTaskListner;
private AlertDialog dialog;
private AlertDialog.Builder builder;
private TaskConfirmationSender taskConfirmationSender;
public MyAdaptorUser(Context c, ArrayList<TaskModel> t, OnTaskClickListner onTaskClickListner) {
context = c;
taskLists = t;
this.mTaskListner = onTaskClickListner;
}
#NonNull
#Override
public MyAdaptorUser.myViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
builder = new AlertDialog.Builder(parent.getContext());
builder.setTitle("Please Wait").setView(R.layout.my_progress_view).setCancelable(false);
dialog = builder.create();
return new MyAdaptorUser.myViewHolder(LayoutInflater.from(context).inflate(R.layout.task_preview, parent, false), mTaskListner);
}
#Override
public void onBindViewHolder(#NonNull MyAdaptorUser.myViewHolder holder, final int position) {
//Set title and description to task preview textviews
holder.title.setText(taskLists.get(position).getTaskTitle());
holder.dueDate.setText(taskLists.get(position).getDueDate());
holder.description.setText(taskLists.get(position).getTaskDescription());
//Sets the path of database to taskAwatingConfirmation/task_title/UserEmail
final DatabaseReference dbRef = FirebaseDatabase.getInstance().getReference();
try {
String email = FirebaseAuth.getInstance().getCurrentUser().getEmail();
email = removeSpecialCharacter(email);
final DatabaseReference taskConfirmationRef = dbRef
.child("taskAwatingConfirmation")
.child(taskLists.get(position).getTaskTitle())
.child(email);
taskConfirmationRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
//Fetching switchButton Status (Task finished) from database
switchTaskFinished.setChecked(false);
String buttonStatus = (String) dataSnapshot.child("buttonStatus").getValue();
if (buttonStatus != null) {
Log.d("taskerror", buttonStatus);
if (buttonStatus.equals("true")) {
switchTaskFinished.setChecked(true);
} else if (buttonStatus.equals("false")) {
switchTaskFinished.setChecked(false);
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
switchTaskFinished.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(final CompoundButton buttonView, boolean isChecked) {
//dialog = builder.show();
taskConfirmationSender = new TaskConfirmationSender();
//When Task Finished button is clicked send data to database
sendConfirmationToAdmin(new FirebaseCallBack() {
#Override
public void Callback(TaskConfirmationSender taskConfirmationSender) {
taskConfirmationSender.setButtonStatus(String.valueOf(buttonView.isChecked()));
taskConfirmationSender.setTaskDueDate(taskLists.get(position).getDueDate());
if (buttonView.isChecked()) {
taskConfirmationRef.setValue(taskConfirmationSender).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
dialog.dismiss();
}
});
}else{
taskConfirmationRef.setValue(taskConfirmationSender).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
dialog.dismiss();
}
});
}
}
});
}
});
} catch (NullPointerException ignored) {
dialog.dismiss();
}
}
private String removeSpecialCharacter(String email) {
StringBuffer sbf = new StringBuffer(email);
email = String.valueOf(sbf.reverse());
int length = email.length();
email = email.substring(4, length);
StringBuffer stringBuffer = new StringBuffer(email);
email = String.valueOf(stringBuffer.reverse());
return email.replace("#", "_");
}
private void sendConfirmationToAdmin(final FirebaseCallBack firebaseCallBack) {
DatabaseReference volunteerRef = FirebaseDatabase.getInstance().getReference()
.child("Volunteer").child("Member")
.child(FirebaseAuth.getInstance().getCurrentUser().getUid());
taskConfirmationSender = new TaskConfirmationSender();
try {
//Fetching details of users (full name, email) from database and setting their value to taskConfirmation Object
volunteerRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
String userName = dataSnapshot.child("fullName").getValue().toString();
String userEmail = dataSnapshot.child("email").getValue().toString();
String userId = dataSnapshot.getKey();
//TODO: Fetch UID of user and set it to taskConfirmation OBject
taskConfirmationSender.setUserEmail(userEmail);
taskConfirmationSender.setUserName(userName);
taskConfirmationSender.setId(userId);
Calendar calendar = Calendar.getInstance();
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH) + 1;
int day = calendar.get(Calendar.DAY_OF_MONTH);
String submissionDate = day + "/" + month + "/" + year;
taskConfirmationSender.setSubmissionDate(submissionDate);
firebaseCallBack.Callback(taskConfirmationSender);
/**/
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
} catch (NullPointerException ee) {
}
}
private interface FirebaseCallBack {
void Callback(TaskConfirmationSender taskConfirmationSender);
}
#Override
public int getItemCount() {
return taskLists.size();
}
class myViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView title, dueDate, description;
OnTaskClickListner onTaskClickListner;
public myViewHolder(#NonNull View itemView, OnTaskClickListner onTaskClickListner) {
super(itemView);
title = itemView.findViewById(R.id.taskTitle);
dueDate = itemView.findViewById(R.id.taskDueDate);
description = itemView.findViewById(R.id.taskDescription);
switchTaskFinished = itemView.findViewById(R.id.switchTaskFinished);
this.onTaskClickListner = onTaskClickListner;
ConstraintLayout taskBar = itemView.findViewById(R.id.linearLayoutTaskBar);
itemView.setOnClickListener(this);
//hides delete task button
taskBar.setVisibility(View.GONE);
}
#Override
public void onClick(View v) {
onTaskClickListner.onTaskClick(getAdapterPosition());
}
}
public interface OnTaskClickListner {
void onTaskClick(int position);
}
}

Maybe its because of the valueEventListener that stays attached:
Instead of this:
taskConfirmationRef.addValueEventListener(new ValueEventListener() {.........
Do this:
taskConfirmationRef.addListenerForSingleValueEvent(new ValueEventListener() {......
And set the switch to checked or unchecked when you turn on or off:
if (buttonView.isChecked()) {
//here
switchTaskFinished.setChecked(true);
taskConfirmationRef.setValue(taskConfirmationSender).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
dialog.dismiss();
}
});
}else{
//here
switchTaskFinished.setChecked(false);
...................

App is not responding after running this activity

New Activity UI load but does not respond, After running onStop() which trigger submit()
List View with the checkbox is bound by a custom adapter. On touch of the Submit button, an intent is triggered which takes me to HomeActivity and onStop() method is triggered which in return call submit method. All submit method is created under a new thread which interfere with UI.
package com.example.cadur.teacher;
public class Attendace extends AppCompatActivity {
DatabaseReference dref;
ArrayList<String> list=new ArrayList<>();
ArrayList<DeatailAttandance> deatailAttandances;
private MyListAdapter myListAdapter;
private ProgressDialog pb;
String year,branch,subject,emailId,pre,abs,rollno,file_name,dat,dat1,roll_str,rollno_present="",rollno_absent="";
int pre_int,abs_int;
ListView listview;
FirebaseDatabase database;
DatabaseReference myRef;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
SharedPreferences sp=getSharedPreferences("login",MODE_PRIVATE);
final String s=sp.getString("Password","");
final String s1=sp.getString("username","");
year=sp.getString("Year","");
branch=sp.getString("Branch","");
subject=sp.getString("Subject","");
final String attend="Attandence";
emailId=sp.getString("emailId","");
if (s!=null&&s!="" && s1!=null&&s1!="") {
setContentView(R.layout.activity_attendace);
deatailAttandances=new ArrayList<>();
listview = findViewById(R.id.list);
TextView detail=findViewById(R.id.lay);
detail.setText(year+" "+branch+" "+" "+subject);
pb =new ProgressDialog(Attendace.this);
pb.setTitle("Connecting Database");
pb.setMessage("Please Wait....");
pb.setCancelable(false);
pb.show();
database=FirebaseDatabase.getInstance();
myRef=database.getReference(year+"/"+branch);
myRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for(DataSnapshot ds:dataSnapshot.getChildren()) {
try {
abs = ds.child("Attandence").child(subject).child("Absent").getValue().toString();
pre = ds.child("Attandence").child(subject).child("Present").getValue().toString();
rollno = ds.getKey().toString();
deatailAttandances.add(new DeatailAttandance(rollno,pre,abs));
myListAdapter=new MyListAdapter(Attendace.this,deatailAttandances);
listview.setAdapter(myListAdapter);
pb.dismiss();
}catch (NullPointerException e){
pb.dismiss();
Intent intent=new Intent(Attendace.this, Login.class);
startActivity(intent);
finish();
}
}
count();
}
#Override
public void onCancelled(DatabaseError error) {
// Failed to read value
}
});
Button selectAll=findViewById(R.id.selectall);
selectAll.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
myListAdapter.setCheck();
count();
}
});
Button submit_attan=findViewById(R.id.submit_attan);
submit_attan.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent =new Intent(Attendace.this,HomeActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
}
});
Button count=findViewById(R.id.count);
count.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
View parentView = null;
int counter=0;
for (int i = 0; i < listview.getCount(); i++) {
parentView = getViewByPosition(i, listview);
CheckBox checkBox=parentView.findViewById(R.id.ch);
if(checkBox.isChecked()){
counter++;
}
}
Toast.makeText(Attendace.this,""+counter,Toast.LENGTH_SHORT).show();
}
});
}else{
SharedPreferences.Editor e = sp.edit();
e.putString("Password", "");
e.putString("username", "");
e.commit();
Intent i=new Intent(Attendace.this,MainActivity.class);
startActivity(i);
finish();
}
}
#Override
protected void onStop() {
Attendace.this.runOnUiThread(new Runnable() {
#Override
public void run() {
submit();
}
});
finish();
super.onStop();
}
public void submit(){
View parentView = null;
final Calendar calendar = Calendar.getInstance();
dat=new SimpleDateFormat("dd_MMM_hh:mm").format(calendar.getTime());
dat1=new SimpleDateFormat("dd MM yy").format(calendar.getTime());
file_name=year+"_"+branch+"_"+dat;
rollno_present=rollno_present+""+year+" "+branch+" "+subject+"\n "+dat+"\n\nList of present Students\n";
rollno_absent=rollno_absent+"\n List of absent Students\n";
for (int i = 0; i < listview.getCount(); i++) {
parentView = getViewByPosition(i, listview);
roll_str = ((TextView) parentView.findViewById(R.id.text1)).getText().toString();
String pre_str = ((TextView) parentView.findViewById(R.id.text22)).getText().toString();
String abs_str = ((TextView) parentView.findViewById(R.id.text33)).getText().toString();
pre_int=Integer.parseInt(pre_str);
abs_int=Integer.parseInt(abs_str);
CheckBox checkBox=parentView.findViewById(R.id.ch);
if(checkBox.isChecked()){
pre_int++;
myRef.child(roll_str).child("Attandence").child(subject).child("Present").setValue(""+pre_int);
myRef.child(roll_str).child("Attandence").child(subject).child("Date").child(dat1).setValue("P");
rollno_present=rollno_present+"\n"+roll_str+"\n";
}else{
abs_int++;
myRef.child(roll_str).child("Attandence").child(subject).child("Absent").setValue(""+abs_int);
myRef.child(roll_str).child("Attandence").child(subject).child("Date").child(dat1).setValue("A");
rollno_absent=rollno_absent+"\n"+roll_str+"\n";
}
}
// Toast.makeText(Attendace.this,"Attendance Updated Successfully",Toast.LENGTH_SHORT).show();
AsyncTask.execute(new Runnable() {
#Override
public void run() {
generateNoteOnSD(Attendace.this,file_name,rollno_present+""+rollno_absent);
}
});
}
public void count(){
View parentView = null;
int counter=0;
for (int i = 0; i < listview.getCount(); i++) {
parentView = getViewByPosition(i, listview);
CheckBox checkBox=parentView.findViewById(R.id.ch);
if(checkBox.isChecked()){
counter++;
}
}
Toast.makeText(Attendace.this,""+counter,Toast.LENGTH_SHORT).show();
}
private View getViewByPosition(int pos, ListView listview1) {
final int firstListItemPosition = listview1.getFirstVisiblePosition();
final int lastListItemPosition = firstListItemPosition + listview1.getChildCount() - 1;
if (pos < firstListItemPosition || pos > lastListItemPosition) {
return listview1.getAdapter().getView(pos, null, listview1);
} else {
final int childIndex = pos - firstListItemPosition;
return listview1.getChildAt(childIndex);
}
}
public void generateNoteOnSD(Context context, String sFileName, String sBody) {
try
{
File root = new File(Environment.getExternalStorageDirectory(),year+"_"+branch+"_Attendance");
if (!root.exists())
{
root.mkdirs();
}
File gpxfile = new File(root, file_name+".doc");
FileWriter writer = new FileWriter(gpxfile,true);
writer.append(sBody+"\n");
writer.flush();
writer.close();
// Toast.makeText(Attendace.this,"File Generated",Toast.LENGTH_SHORT).show();
}
catch(IOException e)
{
e.printStackTrace();
}
}
}

Just use
submit();
instead of using
Attendace.this.runOnUiThread(new Runnable() {
#Override
public void run() {
submit();
}
});
and remove finish()