How to refresh recyclerview after change the data through click button?

How to refresh recyclerview after change the data through click button? - java

For the first time I want to change my value of the data in a recycler view holder, it is works, but once I click to change the value again in the same recycler view holder, it can't works and it still retrieve the old data. I tried the method like adapter.notifyDataSetChanged() but it seems like not work.
public class Admin_admittutorpage extends AppCompatActivity implements myadapter_tutorlist.OnNoteListener {
//private static final String TAG = "Sometry" ;
RecyclerView recview;
myadapter_tutorlist adapter;
public static ArrayList<User> allUser =new ArrayList<>();
AlertDialog.Builder builder;
DatabaseReference mroot ;
private FirebaseAuth mFirebaseAuth;
public void addUserInfo(User muser){
allUser.add(muser);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_admin_admittutorpage);
recview = (RecyclerView)findViewById(R.id.admin_tutor_recyclerview);
recview.setLayoutManager(new LinearLayoutManager(this));
FirebaseRecyclerOptions<User> options = new FirebaseRecyclerOptions.Builder<User>()
.setQuery(FirebaseDatabase.getInstance().getReference().child("Users").orderByChild("role").equalTo("Tutor"),
User.class).build();
adapter = new myadapter_tutorlist(options, this);
recview.setAdapter(adapter);
}
#Override
protected void onStart(){
super.onStart();
adapter.startListening();
}
#Override
protected void onStop(){
super.onStop();
adapter.stopListening();
}
#Override
public void onNoteClick(final int position) {
//Log.d(TAG, "trytry" + allUser.get(position).getUsername());
builder = new AlertDialog.Builder(this);
builder.setMessage(R.string.dialog_message).setTitle(R.string.dialog_title);
builder.setMessage("Do you want to delete or activate tutor account ?")
.setCancelable(false)
.setPositiveButton("Unactivate", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// Action for 'NO' Button dialog.cancel();
Toast.makeText(getApplicationContext(), "you choose to unactivate tutor account", Toast.LENGTH_SHORT).show();
final String selectedEmail = allUser.get(position).getEmail();
DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference usersRef = rootRef.child("Users");
ValueEventListener eventListener = new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
for (DataSnapshot ds : snapshot.getChildren()) {
String myemail = ds.child("email").getValue().toString();
if(selectedEmail.equals(myemail)){
if(allUser.get(position).getActive().equals(true)) {
ds.getRef().child("active").setValue(false);
}
}
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
};
usersRef.addListenerForSingleValueEvent(eventListener);
}
})
.setNeutralButton("Delete", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Toast.makeText(getApplicationContext(), "you choose to delete tutor account", Toast.LENGTH_SHORT).show();
}
})
.setNegativeButton("Activate", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// Action for 'YES' Button
Toast.makeText(getApplicationContext(), "you choose to activate tutor account", Toast.LENGTH_SHORT).show();
if (allUser.get(position).getActive().equals(true)) {
Toast.makeText(getApplicationContext(), "The tutor account is already in active status", Toast.LENGTH_SHORT).show();
} else {
final String selectedEmail = allUser.get(position).getEmail();
DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference usersdRef = rootRef.child("Users");
ValueEventListener eventListener = new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for (DataSnapshot ds : dataSnapshot.getChildren()) {
String myemail = ds.child("email").getValue().toString();
if (selectedEmail.equals(myemail)) {
if (allUser.get(position).getActive().equals(false)) {
ds.getRef().child("active").setValue(true);
}
}
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
};
usersdRef.addListenerForSingleValueEvent(eventListener);
}
}
});
//Creating dialog box
AlertDialog alert = builder.create();
//Setting the title manually
alert.setTitle("Account Activation Alert");
alert.show();
}
}

Related

Cannot fetch children data from firebase database and post it to activity

so here I am trying to fetch students from the database so that I can be able to take attendance but so far I've tried approaching it with a different logic and still it is not showing anything. So kindly take a look a tell me where I did wrong.
everything is running smoothly just that I cannot fetch students from the database so take it can allow me to mark attendance
private String intendUnit, intendDate;
private DatabaseReference studentRef, departmentRef, attendanceRef, presentRef, absentRef;
private String department, faculty;
private List<StudentConstructor> studentList = new ArrayList<>();
private ListView listView;
private RecyclerView recyclerView;
private TakeAttendanceRecyclerViewHelper recyclerViewHelper;
private Button btnSubmit;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_take_attendance);
Toolbar toolbar = findViewById(R.id.toolbarTake);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
Intent intent = getIntent();
intendUnit = intent.getStringExtra("SU");
intendDate = intent.getStringExtra("DATE");
btnSubmit = findViewById(R.id.btnTakeSubmit);
recyclerView = findViewById(R.id.recyclerTakeAttendance);
studentRef = FirebaseDatabase.getInstance().getReference().child("Department");
attendanceRef = FirebaseDatabase.getInstance().getReference().child("Department").child("Attendance");
presentRef = FirebaseDatabase.getInstance().getReference().child("Department").child("Attendance").child("Present");
absentRef = FirebaseDatabase.getInstance().getReference().child("Department").child("Attendance").child("Absent");
studentRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
if (snapshot.exists()){
for (DataSnapshot snapshot1:snapshot.getChildren()){
department = snapshot1.getKey();
departmentRef = FirebaseDatabase.getInstance().getReference().child("Department").child("Student");
departmentRef.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
studentList.clear();
if (snapshot.exists()){
for (DataSnapshot snapshot2:snapshot.getChildren()){
for (DataSnapshot snapshot3:snapshot2.getChildren()){
if (snapshot3.hasChildren()){
StudentConstructor student = snapshot3.getValue(StudentConstructor.class);
if (student.getUnit().contains(intendDate)){
studentList.add(student);
}
}
}
}
recyclerViewHelper = new TakeAttendanceRecyclerViewHelper(getApplicationContext(), studentList);
recyclerView.setLayoutManager(new LinearLayoutManager(TakeAttendanceActivity.this));
recyclerViewHelper.notifyDataSetChanged();
recyclerView.setAdapter(recyclerViewHelper);
}
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
TakeAttendanceRecyclerViewHelper.presentList.clear();
TakeAttendanceRecyclerViewHelper.absentList.clear();
btnSubmit.setOnClickListener(v -> {
final AlertDialog dialog = new AlertDialog.Builder(TakeAttendanceActivity.this).create();
View view = LayoutInflater.from(TakeAttendanceActivity.this).inflate(R.layout.attendance_popup, null);
TextView total, present, absent;
Button btnConfirm, btnCancel;
total = view.findViewById(R.id.totalStudent);
present = view.findViewById(R.id.presentStudent);
absent = view.findViewById(R.id.absentStudent);
btnConfirm = view.findViewById(R.id.btnConfirm);
btnCancel = view.findViewById(R.id.btnCancel);
total.setText(Integer.toString(studentList.size()));
present.setText(Integer.toString(TakeAttendanceRecyclerViewHelper.presentList.size()));
absent.setText(Integer.toString(TakeAttendanceRecyclerViewHelper.absentList.size()));
dialog.setCancelable(true);
dialog.setView(view);
btnCancel.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
dialog.dismiss();
}
});
btnConfirm.setOnClickListener(v1 -> {
String presentStudentID = "";
for (int i = 0; i < TakeAttendanceRecyclerViewHelper.presentList.size(); i++){
presentStudentID = TakeAttendanceRecyclerViewHelper.presentList.get(i);
presentRef.child(presentStudentID).setValue(presentStudentID);
}
String absentStudentID = "";
for (int i = 0; i < TakeAttendanceRecyclerViewHelper.absentList.size(); i++){
absentStudentID = TakeAttendanceRecyclerViewHelper.absentList.get(i);
absentRef.child(absentStudentID).setValue(absentStudentID);
}
TakeAttendanceRecyclerViewHelper.presentList.clear();
TakeAttendanceRecyclerViewHelper.absentList.clear();
dialog.cancel();
Toast.makeText(getApplicationContext(), "Attendance taken successfully", Toast.LENGTH_SHORT).show();
});
dialog.show();
});
}
#Override
public boolean onOptionsItemSelected(MenuItem item){
if (item.getItemId() == android.R.id.home){
this.finish();
}
return super.onOptionsItemSelected(item);
}
}

How do I get the Uid of the current user and of other users from firebase realtime database

I had user shared preferences to get the current Uid or other Uid from realtime database. But I need to do the same without the use of shared preferences. This is for my ProfileActivity and I am using viewpager with three different fragments. The shared preferences show only the current user's profile even when searched for other user in the app.
The image attached is the output of the profile activity in my smartphone. The top bar containing the username and the logout button is of the profile activity and the rest below the blue banner is of the viewpager
public class ProfileActivity extends AppCompatActivity {
private ImageView logout;
private TextView post;
private FloatingActionButton floatingActionButton;
private TabLayout tabLayout;
private ViewPager viewPager;
private TextView username;
private FirebaseUser fUser;
private DatabaseReference databaseReference;
private FirebaseDatabase firebaseDatabase;
private FirebaseAuth firebaseAuth;
String profileId;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_profile);
fUser = FirebaseAuth.getInstance().getCurrentUser();
firebaseAuth = FirebaseAuth.getInstance();
databaseReference = FirebaseDatabase.getInstance().getReference()
.child("Users").child(Objects.requireNonNull(firebaseAuth.getUid()));
String data = getBaseContext().getSharedPreferences("PROFILE", Context.MODE_PRIVATE)
.getString("profileId", "none");
if (data.equals("none")){
profileId = fUser.getUid();
} else{
profileId = data;
}
logout = findViewById(R.id.log_out);
username = findViewById(R.id.username);
floatingActionButton = findViewById(R.id.floatingActionButton);
post = findViewById(R.id.posts_account);
tabLayout = findViewById(R.id.tab_layout);
viewPager = findViewById(R.id.view_pager);
tabLayout.setupWithViewPager(viewPager);
VPAdapter vpAdapter = new VPAdapter(getSupportFragmentManager(), FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
vpAdapter.addFragment(new Profile(), "Profile");
vpAdapter.addFragment(new MyPosts(), "Posts");
if (profileId.equals(fUser.getUid())){
vpAdapter.addFragment(new SavedPosts(), "Saved");
}
viewPager.setAdapter(vpAdapter);
getPostCount();
userInfo();
getSupportActionBar().hide();
floatingActionButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(ProfileActivity.this, PostActivity.class));
finish();
}
});
logout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
AlertDialog alertDialog = new AlertDialog.Builder(ProfileActivity.this).create();
alertDialog.setTitle("Are you sure to logout?");
alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, "No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
FirebaseAuth.getInstance().signOut();
startActivity(new Intent(ProfileActivity.this, StartActivity.class).setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK));
finish();
}
});
alertDialog.show();
alertDialog.getButton(AlertDialog.BUTTON_NEGATIVE)
.setTextColor(ContextCompat.getColor(ProfileActivity.this, R.color.colorRed));
alertDialog.getButton(AlertDialog.BUTTON_POSITIVE)
.setTextColor(ContextCompat.getColor(ProfileActivity.this, R.color.colorRed));
}
});
}
private void getPostCount() {
FirebaseDatabase.getInstance().getReference().child("Posts").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
int counter = 0;
for (DataSnapshot snapshot : dataSnapshot.getChildren()){
Posts posts = snapshot.getValue(Posts.class);
if (posts.getPublisher().equals(profileId)) counter ++;
}
post.setText(String.valueOf(counter));
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
}
private void userInfo() {
FirebaseDatabase.getInstance().getReference().child("Users").child(profileId).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
User user = snapshot.getValue(User.class);
username.setText("#" + user.getUsername());
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
}
}
The above is the code of the profile activity
public class MyPosts extends Fragment {
private RecyclerView recyclerView;
private PostAdapter photoAdapter;
private List<Posts> myPhotoList;
private FirebaseUser fUser;
String profileId;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_my_thoughts, container, false);
fUser = FirebaseAuth.getInstance().getCurrentUser();
String data = getContext().getSharedPreferences("PROFILE", Context.MODE_PRIVATE)
.getString("profileId", "none");
if (data.equals("none")){
profileId = fUser.getUid();
} else{
profileId = data;
}
recyclerView = view.findViewById(R.id.recycler_view_pictures);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new GridLayoutManager(getContext(), 1));
myPhotoList = new ArrayList<>();
photoAdapter = new PostAdapter(getContext(), myPhotoList);
recyclerView.setAdapter(photoAdapter);
myPhotos();
return view;
}
private void myPhotos() {
FirebaseDatabase.getInstance().getReference().child("Posts").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
myPhotoList.clear();
for (DataSnapshot snapshot : dataSnapshot.getChildren()){
Posts post = snapshot.getValue(Posts.class);
if (post.getPublisher().equals(profileId)){
myPhotoList.add(post);
}
}
Collections.reverse(myPhotoList);
photoAdapter.notifyDataSetChanged();
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
}
}
the above is the code for the posts fragments inside the viewpager of the profile activity
public class Profile extends Fragment {
private CircleImageView imageProfile;
private TextView followers;
private TextView following;
private TextView fullname;
private TextView bio;
private CircleImageView verification;
private TextView usernamebottom;
private Button editProfile;
private FirebaseUser fUser;
String profileId;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_profile, container, false);
fUser = FirebaseAuth.getInstance().getCurrentUser();
String data = getContext().getSharedPreferences("PROFILE", Context.MODE_PRIVATE)
.getString("profileId", "none");
if (data.equals("none")){
profileId = fUser.getUid();
} else{
profileId = data;
getContext().getSharedPreferences("PROFILE", Context.MODE_PRIVATE).edit().clear().apply();
}
imageProfile = view.findViewById(R.id.image_profile);
verification = view.findViewById(R.id.verification_profile);
followers = view.findViewById(R.id.followers);
following = view.findViewById(R.id.following);
fullname = view.findViewById(R.id.full_name);
bio = view.findViewById(R.id.bio);
usernamebottom = view.findViewById(R.id.username_btm);
editProfile = view.findViewById(R.id.edit_profile);
getFollowersAndFollowingCount();
userInfo();
if (profileId.equals(fUser.getUid())){
editProfile.setText("Edit profile");
} else {
checkFollowingStatus();
}
editProfile.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String btnText = editProfile.getText().toString();
if (btnText.equals("Edit profile")){
//Go to edit profile
startActivity(new Intent(getContext(), EditProfileActivity.class));
} else{
if (btnText.equals("follow")){
FirebaseDatabase.getInstance().getReference().child("Follow").child(fUser.getUid())
.child("following").child(profileId).setValue(true);
FirebaseDatabase.getInstance().getReference().child("Follow")
.child(profileId).child("followers").child(fUser.getUid()).setValue(true);
} else {
FirebaseDatabase.getInstance().getReference().child("Follow").child(fUser.getUid())
.child("following").child(profileId).removeValue();
FirebaseDatabase.getInstance().getReference().child("Follow")
.child(profileId).child("followers").child(fUser.getUid()).removeValue();
}
}
}
});
return view;
}
private void checkFollowingStatus() {
FirebaseDatabase.getInstance().getReference().child("Follow").child(fUser.getUid()).child("following")
.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.child(profileId).exists()) {
editProfile.setText("following");
} else {
editProfile.setText("follow");
}
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
}
private void getFollowersAndFollowingCount() {
DatabaseReference ref = FirebaseDatabase.getInstance().getReference().child("Follow").child(profileId);
ref.child("followers").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
followers.setText("" + dataSnapshot.getChildrenCount());
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
ref.child("following").addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
following.setText("" + dataSnapshot.getChildrenCount());
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
}
private void userInfo() {
FirebaseDatabase.getInstance().getReference().child("Users").child(profileId).addValueEventListener(new ValueEventListener() {
#SuppressLint("SetTextI18n")
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
User user = snapshot.getValue(User.class);
if (user.getImageurl().equals("default")){
imageProfile.setImageResource(R.drawable.ic_empty_profile);
} else {
Picasso.get().load(user.getImageurl()).into(imageProfile);
}
usernamebottom.setText("#" + user.getUsername());
fullname.setText(user.getName());
bio.setText(user.getBio());
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
}
});
}
}
The above is the code of the user detail fragment also in the view pager of my profile activity

Android ImageView null object when trying to set Image

I am having difficulty setting an ImageView with a string download url that is in a user object that came from the firebase storage DB. The method setImage() is saying the Imageview is a null object and this is true as I have tried to debug it and it comes up as null. How can I resolve this. I think it has something to do with the anonymous inner class.
public class DashBoard extends AppCompatActivity {
private FirebaseAuth mAuth;
private ArrayList<String> motivatingMessages;
private Button gymLocations, profile,health;
public ImageView profileImageView;
private TextView welcome;
#Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
showProfilePicture();
profileImageView = findViewById(R.id.personalProfile);
mAuth = FirebaseAuth.getInstance();
FirebaseUser user = mAuth.getCurrentUser();
setContentView(R.layout.activity_dash_board);
//getSupportActionBar().setTitle("Welcome To Bodify");
profile = findViewById(R.id.buttonProfile);
gymLocations = findViewById(R.id.gymFinderButton);
health = findViewById(R.id.healthButton);
welcome = findViewById(R.id.welcomeUser);
final String userID = mAuth.getUid();
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("User").child(userID);
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
User user = snapshot.getValue(User.class);
if (user != null) {
welcome.setText("User Logged in: ");
welcome.append(user.getUserName());
}
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
Toast.makeText(DashBoard.this, "Error Occurred: " + error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
gymLocations.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(), GymsNearMe.class));
}
});
profile.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(getApplicationContext(), PersonalProfile.class));
}
});
health.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(DashBoard.this,Health.class));
}
});
}
public void showProfilePicture() {
mAuth = FirebaseAuth.getInstance();
final String userID = mAuth.getUid();
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("User").child(userID);
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot snapshot) {
User user = snapshot.getValue(User.class);
String image = user.getmImageUrl();
setImage(image);
}
#Override
public void onCancelled(#NonNull DatabaseError error) {
Toast.makeText(DashBoard.this, "Error Occurred: " + error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}
public void setImage(String image) {
Picasso.get().load(image).into(profileImageView);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.logOut) {
mAuth.signOut();
startActivity(new Intent(getApplicationContext(), LogIn.class));
}
return true;
}
}
enter code here

It looks like you are trying to find the view before inflating the layout:
profileImageView = findViewById(R.id.personalProfile);
move that line after the inflation so after the line:
setContentView(R.layout.activity_dash_board);
In other words, the order of the lines should be:
setContentView(R.layout.activity_dash_board);
mAuth = FirebaseAuth.getInstance();
FirebaseUser user = mAuth.getCurrentUser();
profileImageView = findViewById(R.id.personalProfile);
showProfilePicture();
and you do not need to set the mAuth again in the showProfilePicture

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dash_board);
profileImageView = findViewById(R.id.personalProfile);
profile = findViewById(R.id.buttonProfile);
gymLocations = findViewById(R.id.gymFinderButton);
health = findViewById(R.id.healthButton);
welcome = findViewById(R.id.welcomeUser);
showProfilePicture();
mAuth = FirebaseAuth.getInstance();
FirebaseUser user = mAuth.getCurrentUser();
try with this order

Call adapter.notifyItemChanged(position); working so weird

I have a list that I get from firebase, this list is about posts and what I need is when user like it or unlike it, the list updated through adapter. as I used recyclerview and adapter to show my data after receiving it from firebase. Actually, everything works so fine with me but just this issue when user like or unlike the post it goes crazy. I tried to make a toast to make sure that I'm working with the same position as I expected and it proved me right.
the photo of the post appears and disappears by clicking like button like the vides shows and it does not updating the data in a proper way like it mess with the number of likes
You can find my code below with a video to illustrate the problem I am facing.
I hope somebody can help me out.
private void read_posts() {
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Posts");
reference.addChildEventListener(new ChildEventListener() {
#Override
public void onChildAdded(#NonNull DataSnapshot dataSnapshot, #Nullable String s) {
//post_models.clear();
Post_Model post_model = dataSnapshot.getValue(Post_Model.class);
post_models.add(post_model);
post_adapter = new Post_Adapter(post_models, getContext());
recyclerviewNewsfeed.setAdapter(post_adapter);
progressBar.setVisibility(View.GONE);
}
#Override
public void onChildChanged(#NonNull DataSnapshot dataSnapshot, #Nullable String s) {
Post_Model post_model = dataSnapshot.getValue(Post_Model.class);
for (int i=0;i<post_models.size();i++){
if(post_models.get(i).getId().equals(post_model.getId())){
post_models.set(i,post_model);
post_adapter.notifyItemChanged(i);
break;
}
}
}
#Override
public void onChildRemoved(#NonNull DataSnapshot dataSnapshot) {
}
#Override
public void onChildMoved(#NonNull DataSnapshot dataSnapshot, #Nullable String s) {
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
It's my post adapter
public class Post_Adapter extends RecyclerView.Adapter<Post_Adapter.Viewholder> {
private Context context;
private List<Post_Model> post_models;
FirebaseUser firebaseUser;
List<Like_Model> like_modelList, likeblue_modelList;
View_Photos_Adapter view_Photos_adapter;
boolean userlikeit;
public static int positionn=-1;
public Post_Adapter(List<Post_Model> post_models, Context context) {
this.context = context;
this.post_models = post_models;
}
#NonNull
#Override
public Viewholder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.post_item, parent, false);
return new Viewholder(view);
}
#SuppressLint("SetTextI18n")
#Override
public void onBindViewHolder(#NonNull final Viewholder holder, final int position) {
final Post_Model post_model = post_models.get(position);
firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
DatabaseReference referencee = FirebaseDatabase.getInstance().getReference("Posts").child(post_model.getId());
referencee.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
//Toast.makeText(CommentActivity.this, post_id+"", Toast.LENGTH_SHORT).show();
Post_Model post_modell = dataSnapshot.getValue(Post_Model.class);
// Toast.makeText(CommentActivity.this, post_id+"", Toast.LENGTH_SHORT).show();
if (post_modell.getLikeModels() != null) {
for (int i = 0; i < post_modell.getLikeModels().size(); i++) {
if (post_modell.getLikeModels().get(i).getUserid().equals(firebaseUser.getUid())) {
userlikeit = true;
break;
} else {
userlikeit = false;
}
}
} else {
userlikeit = false;
}
//snapshot.getRef().removeValue();
// Toast.makeText(context, userlikeit+"58", Toast.LENGTH_SHORT).show();
//Toast.makeText(CommentActivity.this, comment_models.size()+"", Toast.LENGTH_SHORT).show();
if (userlikeit) {
holder.likebluebtn.setVisibility(View.VISIBLE);
holder.likebtn.setVisibility(View.GONE);
} else {
holder.likebtn.setVisibility(View.VISIBLE);
holder.likebluebtn.setVisibility(View.GONE);
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
if (post_model.getUserid().equals(firebaseUser.getUid())) {
holder.editbtn.setVisibility(View.VISIBLE);
holder.deletebtn.setVisibility(View.VISIBLE);
} else {
holder.editbtn.setVisibility(View.GONE);
holder.deletebtn.setVisibility(View.GONE);
}
holder.editbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
holder.postTextView.setVisibility(View.GONE);
holder.postEditText.setVisibility(View.VISIBLE);
holder.postEditText.setText(post_model.getPost());
holder.editbtn.setVisibility(View.GONE);
holder.savebtn.setVisibility(View.VISIBLE);
}
});
holder.savebtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Post_Model post_modell = new Post_Model(post_model.getId(), post_model.getUserid()
, holder.postEditText.getText().toString(), post_model.getTime()
, post_model.getCommentModels(), post_model.getPostphotos(), post_model.getLikeModels());
FirebaseDatabase.getInstance().getReference("Posts")
.child(post_model.getId())
.setValue(post_modell);
holder.postTextView.setVisibility(View.VISIBLE);
holder.postEditText.setVisibility(View.GONE);
holder.editbtn.setVisibility(View.VISIBLE);
holder.savebtn.setVisibility(View.GONE);
Toast.makeText(context, "Post has been edited successfully", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(context, NewsfeedActivity.class);
context.startActivity(intent);
((Activity) context).overridePendingTransition(R.anim.slide_in_right, R.anim.slide_in_left);
((Activity) context).finish();
}
});
holder.deletebtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
new AlertDialog.Builder(context)
.setTitle("Delete Post")
.setMessage("Are you sure you want to delete this post?")
// Specifying a listener allows you to take an action before dismissing the dialog.
// The dialog is automatically dismissed when a dialog button is clicked.
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
final DatabaseReference referencee = FirebaseDatabase.getInstance().getReference("Posts")
.child(post_model.getId());
referencee.removeValue();
Toast.makeText(context, "Post deleted successfully", Toast.LENGTH_LONG).show();
Intent intent = new Intent(context, NewsfeedActivity.class);
context.startActivity(intent);
((Activity) context).overridePendingTransition(R.anim.slide_in_right, R.anim.slide_in_left);
((Activity) context).finish();
}
})
// A null listener allows the button to dismiss the dialog and take no further action.
.setNegativeButton(android.R.string.no, null)
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
}
});
firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
like_modelList = new ArrayList<>();
likeblue_modelList = new ArrayList<>();
//Toast.makeText(context, read_likes(post_model.getId())+"", Toast.LENGTH_SHORT).show();
DatabaseReference reference = FirebaseDatabase.getInstance().getReference("Users");
reference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
User user = snapshot.getValue(User.class);
// Toast.makeText(Create_Coworking_SpaceActivity.this, "111111111", Toast.LENGTH_LONG).show();
if (user.getId().equals(post_model.getUserid())) {
if (user.getImageURL().equals("default")) {
holder.userImage.setImageResource(R.drawable.ic_imgprofile);
} else {
Glide.with(holder.itemView).load(user.getImageURL()).into( holder.userImage);
}
holder.username.setText(user.getUsername());
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
if (post_model.getPostphotos() == null) {
holder.postPhotosRC.setVisibility(View.GONE);
} else {
holder.postPhotosRC.setHasFixedSize(true);
holder.postPhotosRC.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false));
view_Photos_adapter = new View_Photos_Adapter(post_model.getPostphotos(), context);
holder.postPhotosRC.setAdapter(view_Photos_adapter);
}
holder.postTextView.setText(post_model.getPost());
holder.posttimeTextView.setText(post_model.getTime());
holder.commentbtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context, CommentActivity.class);
intent.putExtra("post_id", post_model.getId());
context.startActivity(intent);
((Activity) context).overridePendingTransition(R.anim.slide_in_right, R.anim.slide_in_left);
}
});
if (post_model.getCommentModels() != null) {
holder.numofcommentsEditText.setText(post_model.getCommentModels().size() + "");
holder.numofcommentsTextView.setText(post_model.getCommentModels().size() + "");
}
final int[] li = {0};
holder.likebtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
like(post_model.getId());
// Post_Adapter.this.notifyItemChanged(position);
positionn=position;
}
});
holder.likebluebtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Toast.makeText(context, userlikeit+"5", Toast.LENGTH_SHORT).show();
unlike(post_model.getId());
// Post_Adapter.this.notifyItemChanged(position);
positionn=position;
}
});
if (post_model.getLikeModels() != null) {
holder.numoflikesEditText.setText(post_model.getLikeModels().size() + "");
holder.numoflikesTextView.setText(post_model.getLikeModels().size() + "");
}
holder.likesTextView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context, LikeActivity.class);
intent.putExtra("post_id", post_model.getId());
context.startActivity(intent);
((Activity) context).overridePendingTransition(R.anim.slide_in_right, R.anim.slide_in_left);
}
});
holder.commentsTextView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(context, CommentActivity.class);
intent.putExtra("post_id", post_model.getId());
context.startActivity(intent);
((Activity)
context).overridePendingTransition(R.anim.slide_in_right,
R.anim.slide_in_left);
}
});
}
#Override
public int getItemCount() {
return post_models == null ? 0 : post_models.size();
}

My activity goes to previous activity when firebase database change is detected

Thats the Fragment containing the recyclerView which leads to activity with Chat
public class FragmentBusinessHome extends Fragment {
/* For to do adapter */
private List<String> namesToDo;
private List<String> uids;
private List<String> servicesNames;
private AdapterToDo adapterToDo;
private RecyclerView toDoRecyclerView;
/* For checking requests adapter */
private List<String> userUids;
private List<String> serviceNames;
private List<String> userNames;
private AdapterPendingRequests adapterPendingRequests;
private RecyclerView pendingRequestsRecyclerView;
private FirebaseAuth mAuth;
public FragmentBusinessHome(){
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_business_home, container, false);
mAuth = FirebaseAuth.getInstance();
namesToDo = new ArrayList<>();
uids = new ArrayList<>();
servicesNames = new ArrayList<>();
userUids = new ArrayList<>();
serviceNames = new ArrayList<>();
userNames = new ArrayList<>();
toDoRecyclerView = view.findViewById(R.id.toDoRecyclerView);
pendingRequestsRecyclerView = view.findViewById(R.id.requestsToApproveRecyclerView);
LinearLayoutManager layoutManagerActive = new LinearLayoutManager(getActivity());
layoutManagerActive.setStackFromEnd(true);
layoutManagerActive.setReverseLayout(true);
toDoRecyclerView.setLayoutManager(layoutManagerActive);
LinearLayoutManager layoutManagerPendingRequests = new LinearLayoutManager(getActivity());
layoutManagerPendingRequests.setStackFromEnd(true);
layoutManagerPendingRequests.setReverseLayout(true);
pendingRequestsRecyclerView.setLayoutManager(layoutManagerPendingRequests);
String uid = FirebaseAuth.getInstance().getCurrentUser().getUid();
DatabaseReference checkRequests = FirebaseDatabase.getInstance().getReference("Providers").child(uid).child("Gigs");
checkRequests.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot ds : dataSnapshot.getChildren()) {
if (ds.getValue(String.class).equals("active")) {
DatabaseReference getRequests = FirebaseDatabase.getInstance().getReference("Services").child(ds.getKey()).child(uid).child("Gigs").child("pending");
getRequests.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
serviceNames.clear(); userNames.clear(); userUids.clear();
for (DataSnapshot data : dataSnapshot.getChildren()) {
String userName = data.child("names").getValue(String.class);
String serviceName = ds.getKey();
String userUid = data.getKey();
userNames.add(userName);
serviceNames.add(serviceName);
userUids.add(userUid);
adapterPendingRequests = new AdapterPendingRequests(getActivity(), userUids, userNames, serviceNames, mAuth.getCurrentUser().getUid());
adapterPendingRequests.notifyDataSetChanged();
pendingRequestsRecyclerView.setAdapter(adapterPendingRequests);
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
DatabaseReference getActive = FirebaseDatabase.getInstance().getReference("Services").child(ds.getKey()).child(uid).child("Gigs").child("active");
getActive.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
userUids.clear(); namesToDo.clear(); servicesNames.clear();
for(DataSnapshot datas : dataSnapshot.getChildren()){
String userUid = datas.getKey();
String userName = datas.child("names").getValue(String.class);
String serviceName = ds.getKey();
userUids.add(userUid);
namesToDo.add(userName);
servicesNames.add(serviceName);
Log.d("TAG", userUids.toString());
adapterToDo = new AdapterToDo(getActivity(), namesToDo, userUids, servicesNames);
adapterToDo.notifyDataSetChanged();
toDoRecyclerView.setAdapter(adapterToDo);
if(!userUids.isEmpty()){
LinearLayout toDoLayout = view.findViewById(R.id.toDoLayout);
toDoLayout.setVisibility(View.VISIBLE);
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
return view;
}
}
Thats fragment's activity
private ImageButton moreBtn, chatsBtn;
private BottomNavigationView bottomNavigationView;
private FirebaseAuth mAuth;
private FirebaseUser mUser;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_business_home);
getSupportFragmentManager().beginTransaction().replace(R.id.fragmentContainer, new FragmentBusinessHome()).commit();
mAuth = FirebaseAuth.getInstance();
mUser = mAuth.getCurrentUser();
bottomNavigationView = findViewById(R.id.bottomNavigationView);
bottomNavigationView.setOnNavigationItemSelectedListener(navigationListener);
moreBtn = findViewById(R.id.moreBtn);
chatsBtn = findViewById(R.id.chatsBtn);
moreBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final PopupMenu popup = new PopupMenu(BusinessHomeActivity.this, moreBtn);
popup.getMenuInflater().inflate(R.menu.popup_toolbar_more_menu, popup.getMenu());
popup.show();
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
#Override
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()){
case R.id.sign_out_btn:
mAuth.signOut();
new android.os.Handler().postDelayed(
new Runnable() {
public void run() {
Intent to_login_activity = new Intent(BusinessHomeActivity.this, WelcomeActivity.class);
startActivity(to_login_activity);
finish();
}
}, 1000);
}
return true;
}
});
}
});
chatsBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(BusinessHomeActivity.this, "Will be available soon!", Toast.LENGTH_LONG).show();
}
});
}
private BottomNavigationView.OnNavigationItemSelectedListener navigationListener = new BottomNavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem menuItem) {
Fragment selectedFragment = null;
switch (menuItem.getItemId()){
case R.id.home:
selectedFragment = new FragmentBusinessHome();
break;
case R.id.inbox:
selectedFragment = new FragmentInbox();
break;
case R.id.profile:
selectedFragment = new FragmentProfile();
break;
}
getSupportFragmentManager().beginTransaction().replace(R.id.fragmentContainer, selectedFragment).commit();
return true;
}
};
That's the adapter for the fragment
public class AdapterToDo extends RecyclerView.Adapter<AdapterToDo.MyHolder> {
Context context;
List<String> namesToDo;
List<String> uids;
List<String> servicesNames;
public AdapterToDo(Context context, List<String> namesToDo, List<String> uids, List<String> servicesNames) {
this.context = context;
this.namesToDo = namesToDo;
this.uids = uids;
this.servicesNames = servicesNames;
}
#NonNull
#Override
public AdapterToDo.MyHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.to_do_item, parent, false);
return new AdapterToDo.MyHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final AdapterToDo.MyHolder holder, final int position) {
holder.userNames.setText(namesToDo.get(position));
String currentUid = uids.get(position);
String currentOppositeName = namesToDo.get(position);
holder.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent to_chat_activity = new Intent(context, ChatActivity.class);
to_chat_activity.putExtra("oppositeUid", currentUid);
to_chat_activity.putExtra("oppositeNames", currentOppositeName);
to_chat_activity.putExtra("class", getClass().getName());
context.startActivity(to_chat_activity);
}
});
}
#Override
public int getItemCount() {
return uids.size();
}
class MyHolder extends RecyclerView.ViewHolder {
private TextView userNames;
private MyHolder(#NonNull View itemView) {
super(itemView);
userNames = itemView.findViewById(R.id.userNames);
}
}
}
That is the Activity where the fragment's adapter leads to
private String oppositeUid, oppositeNames, className;
private TextView oppositeNamesTextView;
private Button sendBtn;
private EditText message;
private FirebaseAuth mAuth;
private RecyclerView recyclerView;
private List<ModelChat> modelChatList;
private AdapterChat chatAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat);
mAuth = FirebaseAuth.getInstance();
Intent intent = getIntent();
oppositeUid = intent.getStringExtra("oppositeUid");
oppositeNames = intent.getStringExtra("oppositeNames");
className = intent.getStringExtra("class");
Log.d("CLASSNAME", className);
modelChatList = new ArrayList<>();
oppositeNamesTextView = findViewById(R.id.oppositeNames);
sendBtn = findViewById(R.id.sendBtn);
message = findViewById(R.id.message);
recyclerView = findViewById(R.id.chatRecyclerView);
LinearLayoutManager linearLayout = new LinearLayoutManager(this);
linearLayout.setStackFromEnd(true);
recyclerView.setLayoutManager(linearLayout);
oppositeNamesTextView.setText(oppositeNames);
sendBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
final String mMessage = message.getText().toString().trim();
if(!TextUtils.isEmpty(mMessage)){
HashMap<Object, String> hashMap = new HashMap<>();
hashMap.put("sender", mAuth.getCurrentUser().getUid());
hashMap.put("receiver", oppositeUid);
hashMap.put("message", mMessage);
hashMap.put("timestamp", String.valueOf(System.currentTimeMillis()));
if(className.equals("com.example.uploy.AdapterToDo$1")){
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Providers").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
DatabaseReference databaseReference1 = FirebaseDatabase.getInstance().getReference("Users").child(oppositeUid).child("Chats").child(mAuth.getCurrentUser().getUid());
databaseReference1.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
}else{
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Providers").child(oppositeUid).child("Chats").child(mAuth.getCurrentUser().getUid());
databaseReference.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
DatabaseReference databaseReference1 = FirebaseDatabase.getInstance().getReference("Users").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference1.push().setValue(hashMap).addOnSuccessListener(new OnSuccessListener<Void>() {
#Override
public void onSuccess(Void aVoid) {
message.setText("");
}
}).addOnFailureListener(new OnFailureListener() {
#Override
public void onFailure(#NonNull Exception e) {
Toast.makeText(ChatActivity.this, "An error occurred!", Toast.LENGTH_SHORT).show();
}
});
}
}
}
});
if(className.equals("com.example.uploy.AdapterToDo$1")){
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Providers").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
modelChatList.clear();
for(DataSnapshot snapshot : dataSnapshot.getChildren()){
if(snapshot.getKey().equals("details")){
continue;
}
ModelChat modelChat = snapshot.getValue(ModelChat.class);
modelChatList.add(modelChat);
chatAdapter = new AdapterChat(ChatActivity.this, modelChatList);
chatAdapter.notifyDataSetChanged();
recyclerView.setAdapter(chatAdapter);
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}else{
DatabaseReference databaseReference = FirebaseDatabase.getInstance().getReference("Users").child(mAuth.getCurrentUser().getUid()).child("Chats").child(oppositeUid);
databaseReference.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
modelChatList.clear();
for(DataSnapshot snapshot : dataSnapshot.getChildren()){
if(snapshot.getKey().equals("details")){
continue;
}
ModelChat modelChat = snapshot.getValue(ModelChat.class);
modelChatList.add(modelChat);
chatAdapter = new AdapterChat(ChatActivity.this, modelChatList);
chatAdapter.notifyDataSetChanged();
recyclerView.setAdapter(chatAdapter);
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
}
#Override
public void onBackPressed() {
super.onBackPressed();
Log.d("TAG", "PRESSED");
}
The PROBLEM is that when the fragment opens the activity (it contains messages in chat between to users, which are loaded perfectly fine) and the activity detects any change in the chats database reference it stops and loads the previous activity (where the fragment is placed). I wonder what the solution is and I would be glad if you help me.

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