Develop Reference

Showing specific button to current user in Android

My app has a post layout which have an edit button and the send button. All i want to do is to show only edit button if current user is viewing his/her post and not the send button. Just like a stackoverflow post, you can't edit other's post and can't send a message to yourself. I have tried boolean methods but still no solution. Thanks.
Activity that have showButtonsForCurrentUser() method ;
public class ViewPostActivity extends AppCompatActivity {
private static final String TAG = "ViewPostActivity";
//widgets
private TextView mTitle, mDescription, mPrice, mLocation;
//vars
private String mPostId;
private String userId;
private Post mPost;
private PostImages mPostImages;
private ViewPager viewPager;
private ImageView editPostIcon;
private WormDotsIndicator wormDotsIndicator;
public ViewAdapter viewAdapter;
public DatabaseReference reference;
public FirebaseUser currentUser;
public ArrayList<String> IMAGES = new ArrayList<>();
public ArrayList<Uri> mImageUris = new ArrayList<>();
private SquareImageView postImageView;
private User user;
//Dialog and Sheet vars
private Dialog deleteDialog;
private Button deleteBtnDialog;
private Button deleteBtnSheet;
private Button updateBtn;
private Button sendBtn;
private TextView titleTv, messageTv;
private ImageView closeIcon;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_post);
mPostId = getIntent().getStringExtra(getString(R.string.arg_post_id));
mTitle = (TextView) findViewById(R.id.post_title);
mDescription = (TextView) findViewById(R.id.post_description);
mPrice = (TextView) findViewById(R.id.post_price);
mLocation = (TextView) findViewById(R.id.post_location);
postImageView = findViewById(R.id.post_image);
sendBtn = findViewById(R.id.send_msg);
viewPager = findViewById(R.id.view_pager_images);
editPostIcon = findViewById(R.id.edit_post_btn);
wormDotsIndicator = findViewById(R.id.dotsindicator);
editPostIcon.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
showBottomSheetDialog();
}
});
getPostInfo();
showButtonsForCurrentUser();
////MyPosts Layout/////
deleteBtnDialog = findViewById(R.id.dialog_btn);
deleteDialog = new Dialog(this);
////MyPosts Layout/////
sendBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(ViewPostActivity.this, MessageActivity.class);
intent.putExtra("userId", userId);
startActivity(intent);
}
});
}
public void showButtonsForCurrentUser(){
currentUser = FirebaseAuth.getInstance().getCurrentUser();
//sendBtn and editPostIcon are set to GONE.
if (currentUser.equals(userId)){
sendBtn.setVisibility(View.VISIBLE);
}else{
editPostIcon.setVisibility(View.VISIBLE);
}
}
private void getPostInfo(){
Log.d(TAG, "getPostInfo: getting the post information.");
reference = FirebaseDatabase.getInstance().getReference();
Query query = reference.child(getString(R.string.node_posts))
.orderByKey()
.equalTo(mPostId);
query.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
DataSnapshot singleSnapshot = dataSnapshot.getChildren().iterator().next();
if(singleSnapshot != null){
mPost = singleSnapshot.getValue(Post.class);
Log.d(TAG, "onDataChange: found the post: " + mPost.getTitle());
mTitle.setText(mPost.getTitle());
mDescription.setText(mPost.getDescription());
String price = "FREE";
if(mPost.getPrice() != null){
price = "$" + mPost.getPrice();
}
mPrice.setText(price);
String location = mPost.getCity();
mLocation.setText(location);
userId = mPost.getUser_id();
if (mPost.getImage() != null){
wormDotsIndicator.setVisibility(View.INVISIBLE);
postImageView.setVisibility(View.VISIBLE);
Picasso.get().load(mPost.getImage()).into(postImageView);
}else {
IMAGES = mPost.getPostImages();
for (int i = 0; i <IMAGES.size(); i++){
Uri myUri = Uri.parse(IMAGES.get(i));
mImageUris.add(myUri);
}
viewAdapter = new ViewAdapter(getApplication(), IMAGES);
viewPager.setAdapter(viewAdapter);
wormDotsIndicator.setViewPager(viewPager);
}
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private void showBottomSheetDialog() {
final BottomSheetDialog bottomSheetDialog = new BottomSheetDialog(ViewPostActivity.this, R.style.BottomSheetDialogTheme);
LinearLayout linearLayout = findViewById(R.id.bottom_sheet_update_container);
View bottomSheetView = LayoutInflater.from(getApplicationContext()).inflate(R.layout.bottom_sheet_update, linearLayout);
updateBtn = bottomSheetView.findViewById(R.id.update_btnn);
deleteBtnSheet = bottomSheetView.findViewById(R.id.delete_btnn);
bottomSheetDialog.setContentView(bottomSheetView);
bottomSheetDialog.show();
updateBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent updateActivityIntent = new Intent(ViewPostActivity.this, UpdateActivity.class);
if (IMAGES != null){
updateActivityIntent.putStringArrayListExtra("IMAGES", IMAGES);
updateActivityIntent.putParcelableArrayListExtra("IMAGEURIS", mImageUris);
}else {
String singlePhotoUrl = mPost.getImage();
updateActivityIntent.putExtra("Single Photo url", singlePhotoUrl);
}
updateActivityIntent.putExtra("Başlık", mTitle.getText());
updateActivityIntent.putExtra("Açıklama", mDescription.getText());
updateActivityIntent.putExtra("Fiyat", mPrice.getText());
updateActivityIntent.putExtra("mPostId", mPostId);
startActivity(updateActivityIntent);
bottomSheetDialog.dismiss();
}
});
deleteBtnSheet.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
showDeleteDialog();
}
});
}
public void showDeleteDialog(){
deleteDialog.setContentView(R.layout.positive_dialog);
closeIcon = deleteDialog.findViewById(R.id.close_dialog);
deleteBtnDialog = deleteDialog.findViewById(R.id.dialog_btn);
titleTv = deleteDialog.findViewById(R.id.titleTv);
messageTv = deleteDialog.findViewById(R.id.message_dialog);
closeIcon.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
deleteDialog.dismiss();
}
});
deleteDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
deleteDialog.show();
deleteBtnDialog.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
deletePost(mPostId);
finish();
overridePendingTransition( 0, 0);
startActivity(getIntent());
overridePendingTransition( 0, 0);
deleteDialog.dismiss();
}
});
}
private void deletePost(String deletePostId){
Bundle args = new Bundle();
args.putString(getString(R.string.arg_post_id), deletePostId);
Query deleteQuery = reference.child("posts").orderByChild("post_id").equalTo(deletePostId);
deleteQuery.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
for(DataSnapshot delData: dataSnapshot.getChildren()){
delData.getRef().removeValue();
Intent backIntent = new Intent(ViewPostActivity.this, SearchActivity.class);
startActivity(backIntent);
}
Toast.makeText(ViewPostActivity.this,"Data Deleted",Toast.LENGTH_LONG).show();
}
#Override
public void onCancelled(DatabaseError databaseError) {
Toast.makeText(ViewPostActivity.this,databaseError.getMessage(),Toast.LENGTH_LONG).show();
}
});
}
private void status(String status){
currentUser = FirebaseAuth.getInstance().getCurrentUser();
reference = FirebaseDatabase.getInstance().getReference("users").child(currentUser.getUid());
HashMap<String, Object> hashMap = new HashMap<>();
hashMap.put("status", status);
reference.updateChildren(hashMap);
}
#Override
protected void onResume() {
super.onResume();
status("online");
}
#Override
protected void onPause() {
super.onPause();
status("offline");
}
}

what are the values for mPostId?
I would log the userID and currentuser values thats being retrieved, to check if there is no issue your query. The boolean part should work

The menu didn't appear and listview unclickable

Thank you for helping me. The menu didn't appear and the list view in the recycler view is unclickable.
This is the menu part.
public class QuizListActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
private FirebaseAuth mAuth;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quiz_list);
mAuth = FirebaseAuth.getInstance();
mRecyclerView = (RecyclerView)findViewById(R.id.recyclerBView);
new FirebaseDatabaseHelper().readQuiz(new FirebaseDatabaseHelper.DataStatus() {
#Override
public void DataIsLoaded(List<Quiz> quizzes, List<String> keys) {
new RecyclerConfig().setConfig(mRecyclerView, QuizListActivity.this, quizzes, keys);
}
#Override
public void DataIsInserted() {
}
#Override
public void DataIsUpdated() {
}
#Override
public void DataIsDeleted() {
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
FirebaseUser user = mAuth.getCurrentUser();
getMenuInflater().inflate(R.menu.quizlistmenu, menu);
if(user!=null) {
menu.getItem(0).setVisible(true);
menu.getItem(1).setVisible(true);
menu.getItem(2).setVisible(true);
}
return super.onCreateOptionsMenu(menu);
}
public boolean onPrepareOptionsMenu(Menu menu)
{FirebaseUser user = mAuth.getCurrentUser();
if(user!=null) {
menu.getItem(0).setVisible(true);
menu.getItem(1).setVisible(true);
menu.getItem(2).setVisible(true);
}
return super.onPrepareOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(#NonNull MenuItem item) {
switch (item.getItemId())
{
case R.id.new_book:
startActivity(new Intent(this, NewQuestionActivity.class));
return true;
case R.id.user_approval:
startActivity(new Intent(this, Approval.class));
return true;
case R.id.signout:
mAuth.signOut();
invalidateOptionsMenu();
RecyclerConfig.logout();
return true;
}
return super.onOptionsItemSelected(item);
}
}
This is the menu.
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:id="#+id/new_book"
android:title="New Question" />
<item
android:id="#+id/user_approval"
android:title="Registered User" />
<item
android:id="#+id/signout"
android:title="Sign Out" />
</menu>
This is the Recycler part.
public class RecyclerConfig
{
FirebaseAuth mAuth;
private static FirebaseUser user;
private Context mContext;
private QuizAdapter mQuizAdapter;
public void setConfig(RecyclerView mRecyclerView, Context context, List<Quiz> quizzes, List<String> keys)
{
mAuth = FirebaseAuth.getInstance();
user = mAuth.getCurrentUser();
mContext = context;
mQuizAdapter = new QuizAdapter(quizzes, keys);
mRecyclerView.setLayoutManager(new LinearLayoutManager(context));
mRecyclerView.setAdapter(mQuizAdapter);
}
class QuizItemView extends RecyclerView.ViewHolder
{
private TextView mquestion,mans1,mans2,mans3,mans4,mcorrect,mcategoryid;
private String key;
public QuizItemView(ViewGroup parent)
{
super(LayoutInflater.from(mContext)
.inflate(R.layout.quizlistitem, parent, false));
mquestion = (TextView) itemView.findViewById(R.id.questiontv);
mans1 = (TextView) itemView.findViewById(R.id.ans1tv);
mans2 = (TextView) itemView.findViewById(R.id.ans2tv);
mans3 = (TextView) itemView.findViewById(R.id.ans3tv);
mans4 = (TextView) itemView.findViewById(R.id.ans4tv);
mcorrect = (TextView) itemView.findViewById(R.id.correcttv);
mcategoryid = (TextView) itemView.findViewById(R.id.categorytv);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(user!=null) {
Intent intent = new Intent(mContext, QuizDetailActivity.class);
intent.putExtra("key", key);
intent.putExtra("question", mquestion.getText().toString());
intent.putExtra("answer1", mans1.getText().toString());
intent.putExtra("answer2", mans2.getText().toString());
intent.putExtra("answer3", mans3.getText().toString());
intent.putExtra("answer3", mans4.getText().toString());
intent.putExtra("answer3", mcorrect.getText().toString());
intent.putExtra("categoryid", mcategoryid.getText().toString());
mContext.startActivity(intent);
}
/*else
{
mContext.startActivity(new Intent(mContext, SignInActivity.class));
}*/
}
});
}
public void bind(Quiz quizzes, String key)
{
mquestion.setText(quizzes.getQuestion());
mans1.setText(quizzes.getAnswer1());
mans2.setText(quizzes.getAnswer2());
mans3.setText(quizzes.getAnswer3());
mans4.setText(quizzes.getAnswer4());
mcorrect.setText(quizzes.getCorrect());
mcategoryid.setText(quizzes.getCategoryid());
this.key = key;
}
}
class QuizAdapter extends RecyclerView.Adapter<QuizItemView>
{
private List<Quiz> mQuizList;
private List<String> mKeys;
public QuizAdapter(List<Quiz> mQuizList, List<String> mKeys) {
this.mQuizList = mQuizList;
this.mKeys = mKeys;
}
#NonNull
#Override
public QuizItemView onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
return new QuizItemView(parent);
}
#Override
public void onBindViewHolder(#NonNull QuizItemView holder, int position) {
holder.bind(mQuizList.get(position), mKeys.get(position));
}
#Override
public int getItemCount() {
return mQuizList.size();
}
}
public static void logout()
{
user = null;
}
}
This is the login / register part.
public class SignInActivity extends AppCompatActivity {
MaterialEditText edtNewEmail,edtNewPassword,edtnewName, edtnewAge, edtnewAddress, edtStatus; // for register
MaterialEditText edtEmail,edtPassword; //for Signin
Button btnRegister,btnSignIn;
FirebaseAuth mAuth;
FirebaseDatabase database;
DatabaseReference users;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sign_in);
mAuth = FirebaseAuth.getInstance();
//Firebase
database = FirebaseDatabase.getInstance();
users = database.getReference("User");
edtEmail = (MaterialEditText)findViewById(R.id.edtEmail);
edtPassword = (MaterialEditText)findViewById(R.id.edtPassword);
btnSignIn = (Button)findViewById(R.id.signInBtn);
btnRegister = (Button)findViewById(R.id.regBtn);
btnRegister.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
showSignUpDialog();
}
});
btnSignIn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
signIn(edtEmail.getText().toString(),edtPassword.getText().toString());
}
});
}
private void signIn(final String user, final String pwd) {
users.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if(dataSnapshot.child(user).exists())
{
if(!user.isEmpty())
{
User login = dataSnapshot.child(user).getValue(User.class);
if(login.getPassword().equals(pwd))
{
Common.currentUser = login;
if(login.getStatus().equals("Admin"))
{
mAuth.signInWithEmailAndPassword(edtEmail.getText().toString(),
edtPassword.getText().toString());
Toast.makeText(SignInActivity.this, "User signed in", Toast.LENGTH_LONG).show();
Intent intent = new Intent(SignInActivity.this,QuizListActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish(); return;
}
else if(login.getStatus().equals("User") && login.getApproval().equals("Y"))
{
Intent homeactivity = new Intent(SignInActivity.this,Home.class);
startActivity(homeactivity);
finish();
}
else if(login.getStatus().equals("User") && login.getApproval().equals("N"))
{
Intent adminactivity = new Intent(SignInActivity.this,Home.class);
startActivity(adminactivity);
finish();
}
}
else
Toast.makeText(SignInActivity.this,"Login Failed",Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(SignInActivity.this,"Please fill in",Toast.LENGTH_SHORT).show();
}
}
else
{
Toast.makeText(SignInActivity.this,"User doesn't exist",Toast.LENGTH_SHORT).show();
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
private void showSignUpDialog() {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(SignInActivity.this);
alertDialog.setTitle("Sign Up");
//alertDialog.setMessage("Please fill full information");
LayoutInflater inflater = this.getLayoutInflater();
View activity_register = inflater.inflate(R.layout.activity_register,null);
//edtNewUserName = (MaterialEditText)activity_register.findViewById(R.id.edtNewUserName);
edtNewEmail = (MaterialEditText)activity_register.findViewById(R.id.edtNewEmail);
edtNewPassword = (MaterialEditText)activity_register.findViewById(R.id.edtNewPassword);
edtnewName = (MaterialEditText)activity_register.findViewById(R.id.edtnewName);
edtnewAge = (MaterialEditText)activity_register.findViewById(R.id.edtnewAge);
edtnewAddress = (MaterialEditText)activity_register.findViewById(R.id.edtnewAddress);
edtStatus = (MaterialEditText)activity_register.findViewById(R.id.edtStatus);
alertDialog.setView(activity_register);
//alertDialog.setIcon(R.drawable.ic_account_circle_black_24dp);
alertDialog.setNegativeButton("No", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
dialogInterface.dismiss();
}
});
alertDialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
final User user = new User(edtNewEmail.getText().toString(),
edtNewPassword.getText().toString(),edtnewName.getText().toString(),
edtnewAge.getText().toString(),edtnewAddress.getText().toString(),edtStatus.getText().toString(),
"N");
users.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if(dataSnapshot.child(user.getEmail()).exists())
Toast.makeText(SignInActivity.this,"User already exist.",Toast.LENGTH_LONG).show();
else
{
if(dataSnapshot.child(user.getStatus()).exists() && user.getStatus() == "Admin")
{
mAuth.createUserWithEmailAndPassword(edtNewEmail.getText().toString(),
edtNewPassword.getText().toString())
.addOnCompleteListener(new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if(task.isSuccessful())
{
FirebaseDatabase.getInstance().getReference("User")
.child(FirebaseAuth.getInstance().getCurrentUser().getUid()).setValue(user);
}
}
});
}
else {
users.child(user.getEmail())
.setValue(user);
Toast.makeText(SignInActivity.this, "User registered.", Toast.LENGTH_LONG).show();
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
dialogInterface.dismiss();
}
});
alertDialog.show();
}
}
The login and register works well then after login the list recycler view is shown accurately but the menu didn't appear and the recycler view is unclickable.
For the menu, it previously stated that a null reference or something.

For your first question, which is why menu didn't appear because you didn't initialize the FirebaseUser. You need to initiliaze it at method onCreate.
at Class.
private FirebaseUser user;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quiz_list);
mAuth = FirebaseAuth.getInstance();
user = mAuth.getCurrentUser();
}
next, at your onCreateOptionsMenu.
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.quizlistmenu, menu);
if(user!=null) {
menu.getItem(0).setVisible(true);
menu.getItem(1).setVisible(true);
menu.getItem(2).setVisible(true);
}
return super.onCreateOptionsMenu(menu);
}

Can not delete item that is selected, only deletes the last item added

I'm trying to delete the selected item in my RecyclerView, but when I click on my delete Button it just deletes the last item added. And after I delete the last item added I can not delete anymore. What am I missing?
MainActivity
public class MainWishActivity extends AppCompatActivity {
private NavigationView navigationView;
private DrawerLayout drawerLayout;
private ActionBarDrawerToggle actionBarDrawerToggle;
private RecyclerView wishList;
private androidx.appcompat.widget.Toolbar mToolbar;
private ImageButton ibaddnewwishlist;
private CircleImageView NavProfileImage;
private TextView NavProfileFirstName, NavProfileLastName;
private FirebaseAuth mAuth;
private DatabaseReference UsersRef, WishListRef;
String currentUserID;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_wish);
mAuth = FirebaseAuth.getInstance();
currentUserID = mAuth.getCurrentUser().getUid();
UsersRef = FirebaseDatabase.getInstance().getReference().child("Brukere");
WishListRef = FirebaseDatabase.getInstance().getReference().child("Ønskelister").child(currentUserID);
mToolbar = (Toolbar) findViewById(R.id.main_page_toolbar);
setSupportActionBar(mToolbar);
getSupportActionBar().setTitle(" Dine Ønskelister");
drawerLayout = (DrawerLayout)findViewById(R.id.drawable_layout);
actionBarDrawerToggle = new ActionBarDrawerToggle(MainWishActivity.this, drawerLayout, R.string.drawer_open, R.string.drawer_close);
drawerLayout.addDrawerListener(actionBarDrawerToggle);
actionBarDrawerToggle.syncState();
ibaddnewwishlist = (ImageButton)findViewById(R.id.ib_addnewwishlist);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
navigationView = (NavigationView)findViewById(R.id.navigation_view);
wishList = (RecyclerView)findViewById(R.id.rv_wishlist);
wishList.setHasFixedSize(true);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setReverseLayout(true);
linearLayoutManager.setStackFromEnd(true);
wishList.setLayoutManager(linearLayoutManager);
View navView = navigationView.inflateHeaderView(R.layout.navigation_header);
NavProfileImage = (CircleImageView)navView.findViewById(R.id.civ_navprofilepicture);
NavProfileFirstName = (TextView)navView.findViewById(R.id.tv_headerfirstname);
NavProfileLastName = (TextView) navView.findViewById(R.id.tv_headerlastname);
UsersRef.child(currentUserID).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()){
if (dataSnapshot.hasChild("fornavn")){
String firstname = dataSnapshot.child("fornavn").getValue().toString();
NavProfileFirstName.setText(firstname);
}
if (dataSnapshot.hasChild("etternavn")) {
String lastname = dataSnapshot.child("etternavn").getValue().toString();
NavProfileLastName.setText(lastname);
}
if (dataSnapshot.hasChild("profilbilde")){
String image = dataSnapshot.child("profilbilde").getValue().toString();
Picasso.with(MainWishActivity.this).load(image).placeholder(R.drawable.profile).into(NavProfileImage);
}
else{
Toast.makeText(MainWishActivity.this, "Profil navn finnes ikke...", Toast.LENGTH_SHORT).show();
}
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
#Override
public boolean onNavigationItemSelected(#NonNull MenuItem item) {
UserMenuSelector(item);
return false;
}
});
ibaddnewwishlist.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
SendUserToWishListActivity();
}
});
DisplayUsersWishLists();
}
private void DisplayUsersWishLists() {
FirebaseRecyclerAdapter<WishListClass, WishListViewHolder > firebaseRecyclerAdapter =
new FirebaseRecyclerAdapter<WishListClass, WishListViewHolder>
(
WishListClass.class,
R.layout.wish_list_single_layout,
WishListViewHolder.class,
WishListRef
) {
#Override
protected void populateViewHolder(WishListViewHolder viewHolder, WishListClass model, final int position) {
final String Key = getRef(position).getKey();
viewHolder.setFornavn(model.getFornavn());
viewHolder.setDate(model.getDate());
viewHolder.setTitle(model.getTitle());
viewHolder.setProfilbilde(getApplicationContext(), model.getProfilbilde());
viewHolder.mView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent profileIntent = new Intent(MainWishActivity.this, UserWishItemActivity.class);
profileIntent.putExtra("Key", Key);
startActivity(profileIntent);
}
});
}
};
wishList.setAdapter(firebaseRecyclerAdapter);
}
public static class WishListViewHolder extends RecyclerView.ViewHolder{
View mView;
public WishListViewHolder(#NonNull View itemView) {
super(itemView);
mView = itemView;
}
public void setFornavn (String fornavn){
TextView wishlist_name = (TextView) mView.findViewById(R.id.tv_firstnamelist);
wishlist_name.setText(fornavn);
}
public void setProfilbilde (Context ctx, String profilbilde){
CircleImageView image = (CircleImageView) mView.findViewById(R.id.civ_profilepicturelist);
Picasso.with(ctx).load(profilbilde).into(image);
}
public void setDate (String date){
TextView wishlist_date = (TextView) mView.findViewById(R.id.tv_publisheddatelist);
wishlist_date.setText(" " + date);
}
public void setTitle (String title){
TextView wishlist_title = (TextView) mView.findViewById(R.id.tv_wishlisttitle);
wishlist_title.setText(title);
}
}
private void SendUserToWishListActivity(){
Intent addNewPostIntent = new Intent(MainWishActivity.this, AddWishListActivity.class);
startActivity(addNewPostIntent);
}
#Override
protected void onStart() {
super.onStart();
FirebaseUser currentUser = mAuth.getCurrentUser();
if (currentUser == null){
SendUserToLoginActivity();
}
else
{
CheckUserExistence();
}
}
private void CheckUserExistence(){
final String current_user_id = mAuth.getCurrentUser().getUid();
UsersRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if (!dataSnapshot.hasChild(current_user_id)){
SendUserToUserInfoAcitivity();
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
private void SendUserToUserInfoAcitivity(){
Intent setupIntent = new Intent(MainWishActivity.this, UserInfoActivity.class);
setupIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(setupIntent);
finish();
}
private void SendUserToLoginActivity() {
Intent loginIntent = new Intent(MainWishActivity.this, LoginActivity.class);
loginIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(loginIntent);
finish();
}
private void SendUserToFindFriendsActivity(){
Intent findfriendsIntent = new Intent(MainWishActivity.this, FindFriendsActivity.class);
findfriendsIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(findfriendsIntent);
finish();
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (actionBarDrawerToggle.onOptionsItemSelected(item))
{
return true;
}
return super.onOptionsItemSelected(item);
}
private void UserMenuSelector (MenuItem item){
switch (item.getItemId()){
case R.id.navbtn_addwishlist:
SendUserToWishListActivity();
break;
case R.id.navbtn_profile:
Toast.makeText(this, "Profil", Toast.LENGTH_SHORT).show();
break;
case R.id.navbtn_home:
Toast.makeText(this, "Hjem", Toast.LENGTH_SHORT).show();
break;
case R.id.navbtn_friends:
Toast.makeText(this, "Venner", Toast.LENGTH_SHORT).show();
break;
case R.id.navbtn_findfriends:
SendUserToFindFriendsActivity();
break;
case R.id.navbtn_settings:
Toast.makeText(this, "Instillinger", Toast.LENGTH_SHORT).show();
break;
case R.id.navbtn_logout:
mAuth.signOut();
SendUserToLoginActivity();
break;
}
}
SecondActivity
public class UserWishItemActivity extends AppCompatActivity {
private TextView tvwishlisttitle;
private EditText etwishitem;
private Button btnaddwishitem;
private RecyclerView wishListitems;
private String currentUserID, databaseUserID;
private String Key, postRandomName;
private DatabaseReference WishListUsersClickRef, UsersRef, WishItemsRef, wishListRef,WishItemsRef1;
private FirebaseAuth mAuth;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_add_wish_item);
Key = getIntent().getExtras().get("Key").toString();
mAuth = FirebaseAuth.getInstance();
currentUserID = mAuth.getCurrentUser().getUid();
UsersRef = FirebaseDatabase.getInstance().getReference().child("Brukere");
WishItemsRef = FirebaseDatabase.getInstance().getReference().child("Ønsker");
wishListRef = FirebaseDatabase.getInstance().getReference().child("Ønskelister").child(currentUserID).child(Key);
tvwishlisttitle = (TextView)findViewById(R.id.tv_userwishlisttitle);
etwishitem = (EditText)findViewById(R.id.et_wishitem);
btnaddwishitem = (Button)findViewById(R.id.btn_addwishitem);
btnaddwishitem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
CreateWishlist();
}
});
wishListitems = (RecyclerView)findViewById(R.id.rv_wishlistitems);
wishListitems.setHasFixedSize(true);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setReverseLayout(true);
linearLayoutManager.setStackFromEnd(true);
wishListitems.setLayoutManager(linearLayoutManager);
WishListUsersClickRef = FirebaseDatabase.getInstance().getReference("Ønskelister").child(currentUserID).child(Key);
WishListUsersClickRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()){
String title = dataSnapshot.child("title").getValue().toString();
databaseUserID = dataSnapshot.child("uid").getValue().toString();
tvwishlisttitle.setText(title);
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
DisplayWishListItems();
}
private void DisplayWishListItems() {
FirebaseRecyclerAdapter<WishItemClass, WishListItemsViewHolder > firebaseRecyclerAdapter =
new FirebaseRecyclerAdapter<WishItemClass, WishListItemsViewHolder>
(
WishItemClass.class,
R.layout.wish_list_item_layout,
WishListItemsViewHolder.class,
WishItemsRef.child(Key)
) {
#Override
protected void populateViewHolder(final WishListItemsViewHolder viewHolder, final WishItemClass model, final int position) {
viewHolder.setWishitemname(model.getWishitemname());
viewHolder.m1View.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View view) {
AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(UserWishItemActivity.this);
LayoutInflater inflater = getLayoutInflater();
final View dialogView = inflater.inflate(R.layout.endreslettjobb_dialog, null);
dialogBuilder.setView(dialogView);
dialogBuilder.setTitle(model.getWishitemname());
final AlertDialog alertDialog = dialogBuilder.create();
alertDialog.show();
final Button btndelete = (Button)dialogView.findViewById(R.id.btn_delete);
btndelete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
WishItemsRef.removeValue();
}
});
return false;
}
});
}
};
wishListitems.setAdapter(firebaseRecyclerAdapter);
}
public static class WishListItemsViewHolder extends RecyclerView.ViewHolder{
View m1View;
public WishListItemsViewHolder(#NonNull View itemView) {
super(itemView);
m1View = itemView;
}
public void setWishitemname (String wishitemname){
TextView wishitem_name = (TextView) m1View.findViewById(R.id.tv_wishitemname);
wishitem_name.setText(wishitemname);
}
public void setUid (String uid){
}
}
private void CreateWishlist() {
postRandomName = String.valueOf(new Date().getTime());
final String wishlist = etwishitem.getText().toString().trim();
etwishitem.setText("");
wishListRef.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
HashMap postMap = new HashMap();
postMap.put("uid", currentUserID);
postMap.put("wishitemname", wishlist);
WishItemsRef.child(Key).child(postRandomName).updateChildren(postMap)
.addOnCompleteListener(new OnCompleteListener() {
#Override
public void onComplete(#NonNull Task task) {
}
});
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
AddItemActivity
private Spinner spwishlisttitle;
private Button btnsavewishlist;
private DatabaseReference UsersRef, wishListRef;
private FirebaseAuth mAuth;
private String saveCurrentDate, currentUserID, postRandomName;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_wish_list);
UsersRef = FirebaseDatabase.getInstance().getReference().child("Brukere");
wishListRef = FirebaseDatabase.getInstance().getReference().child("Ønskelister");
mAuth = FirebaseAuth.getInstance();
currentUserID = mAuth.getCurrentUser().getUid();
spwishlisttitle = (Spinner) findViewById(R.id.sp_wishlisttitle);
btnsavewishlist = (Button) findViewById(R.id.btn_savewishlist);
btnsavewishlist.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
CreateWishlist();
}
});
}
private void CreateWishlist() {
Calendar calFordDate = Calendar.getInstance();
SimpleDateFormat currentDate = new SimpleDateFormat("dd-MMMM-yyyy");
saveCurrentDate = currentDate.format(calFordDate.getTime());
postRandomName = String.valueOf(new Date().getTime());
final String wishlist = spwishlisttitle.getSelectedItem().toString().trim();
UsersRef.child(currentUserID).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(#NonNull DataSnapshot dataSnapshot) {
if (dataSnapshot.exists()) {
String userFirstname = dataSnapshot.child("fornavn").getValue().toString();
String userProfileImage = dataSnapshot.child("profilbilde").getValue().toString();
HashMap postMap = new HashMap();
postMap.put("uid", currentUserID);
postMap.put("date", saveCurrentDate);
postMap.put("title", wishlist);
postMap.put("profilbilde", userProfileImage);
postMap.put("fornavn", userFirstname);
wishListRef.child(currentUserID).child(currentUserID + postRandomName).updateChildren(postMap)
.addOnCompleteListener(new OnCompleteListener() {
#Override
public void onComplete(#NonNull Task task) {
if (task.isSuccessful()) {
SendUserToMainActivity();
Toast.makeText(AddWishListActivity.this, "Ønskeliste opprettet", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(AddWishListActivity.this, "Error ocurred", Toast.LENGTH_SHORT).show();
}
}
});
}
}
#Override
public void onCancelled(#NonNull DatabaseError databaseError) {
}
});
}
private void SendUserToMainActivity() {
Intent mainIntent = new Intent(AddWishListActivity.this, MainWishActivity.class);
startActivity(mainIntent);
}
}
I have edited my question with my code.
Hope this is helpful.

The items not appear in recyclerview

I face a problem when I send a comment, that comment does not appear in RecyclerView, I have to go back and reopen Activity again to see my reply.
BlogSingleActivity.java
public class BlogSingleActivity extends AppCompatActivity {
private String mPost_key = null;
DatabaseReference mDatabase;
private ImageView mBlogSingleImage;
private TextView mBlogSingleTitle;
private TextView mBlogSingleDesc;
private TextView mBlogSingleUsername, mNumbersOfComments;
private TextView mBlogSingleDate;
private DatabaseReference ReplayDatabase;
private RecyclerView mReplayBlogList;
private TextView emptyView;
FirebaseRecyclerAdapter<Blog, BlogViewHolder> mAdapter;
private EditText mReplayText;
private FirebaseAuth mAuth;
private FirebaseUser mCurrentUser;
private DatabaseReference mDatabaseUser;
private Uri mImagUri = null;
private static final int GALLERY_REQUEST = 2;
private StorageReference mStorage;
private ImageButton mselectImage;
Button sendBTN;
private ProgressDialog mProgress;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_blog_single);
mPost_key = getIntent().getExtras().getString("blog_id");
mDatabase = FirebaseDatabase.getInstance().getReference().child("Blog");
ReplayDatabase = FirebaseDatabase.getInstance().getReference().child("Replay");
mBlogSingleDesc = findViewById(R.id.singleBlogDesc);
mBlogSingleTitle = findViewById(R.id.post_Tittle);
mBlogSingleImage = findViewById(R.id.singleBlogImage);
mBlogSingleUsername = findViewById(R.id.singleBlogUsername);
mBlogSingleDate = findViewById(R.id.singleBlogDate);
mNumbersOfComments = findViewById(R.id.numberofcomments);
assert getSupportActionBar() != null;
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
mReplayBlogList = findViewById(R.id.replay_blog_list);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setReverseLayout(true);
layoutManager.setStackFromEnd(true);
mReplayBlogList.setLayoutManager(layoutManager);
mReplayBlogList.setNestedScrollingEnabled(false);
emptyView = findViewById(R.id.empty_view);
chickitem();
mAuth = FirebaseAuth.getInstance();
mCurrentUser = mAuth.getCurrentUser();
mDatabaseUser = FirebaseDatabase.getInstance().getReference().child("Users").child(mCurrentUser.getUid());
mReplayText = findViewById(R.id.ReplayField);
mStorage = FirebaseStorage.getInstance().getReference();
mselectImage = findViewById(R.id.replayImageSelect);
sendBTN = findViewById(R.id.send_BTN);
getfirebaseData();
mProgress = new ProgressDialog(this);
mselectImage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent galleryIntent = new Intent(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/*");
startActivityForResult(galleryIntent, GALLERY_REQUEST);
}
});
sendBTN.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
startReplay();
getfirebaseData();;
disappearKeyboard();
mReplayText.getText().clear();
mselectImage.setImageResource(R.mipmap.add_btn);
mselectImage.setBackgroundColor(getResources().getColor(R.color.image_background_color));
}
});
mDatabase.child(mPost_key).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
String post_title = (String) dataSnapshot.child("tittle").getValue();
String post_desc = (String) dataSnapshot.child("desc").getValue();
String post_image = (String) dataSnapshot.child("image").getValue();
String post_username = (String) dataSnapshot.child("username").getValue();
Object post_date = dataSnapshot.child("date").getValue();
Blog timeStamp = new Blog();
timeStamp.setDate(post_date);
if (timeStamp.getDate() != null) {
String datee = timeStamp.getDate().toString();
long time = Long.parseLong(datee);
String timeAgo = TimeAgo.getTimeAgo(time);
mBlogSingleDate.setText(timeAgo);
}
mBlogSingleTitle.setText(post_title);
mBlogSingleDesc.setText(post_desc);
mBlogSingleUsername.setText(post_username);
Picasso.with(BlogSingleActivity.this)
.load(post_image)
.into(mBlogSingleImage);
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private void disappearKeyboard() {
InputMethodManager inputManager =
(InputMethodManager) this.
getSystemService(Context.INPUT_METHOD_SERVICE);
inputManager.hideSoftInputFromWindow(
this.getCurrentFocus().getWindowToken(),
InputMethodManager.HIDE_NOT_ALWAYS);
}
private void startReplay() {
{
final String replay_val = mReplayText.getText().toString().trim();
//send date to firebase database
if (!TextUtils.isEmpty(replay_val) && mImagUri != null) {
mProgress.setMessage("جاري الإرسال....");
mProgress.show();
StorageReference filepath = mStorage.child("Replay_Images").child(mImagUri.getLastPathSegment());
filepath.putFile(mImagUri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
#Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
if (mAuth.getCurrentUser() != null) {
#SuppressWarnings("VisibleForTests") final Uri downloadUrl = taskSnapshot.getDownloadUrl();
final DatabaseReference newPost = ReplayDatabase.child(mPost_key).push();
mDatabaseUser.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (dataSnapshot.getValue() != null) {
newPost.child("replayimage").setValue(downloadUrl.toString());
newPost.child("replay").setValue(replay_val);
newPost.child("replaydate").setValue(ServerValue.TIMESTAMP);
newPost.child("uid").setValue(mCurrentUser.getUid());
newPost.child("replayname").setValue(dataSnapshot.child("name").getValue()).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
if (task.isSuccessful()) {
chickitem();
mAdapter.notifyDataSetChanged();
}
}
});
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
mProgress.dismiss();
}
}
});
} else if ((!TextUtils.isEmpty(replay_val))) {
mProgress.setMessage("جاري الإرسال....");
mProgress.show();
if (mAuth.getCurrentUser() != null) {
final DatabaseReference newPost = ReplayDatabase.child(mPost_key).push();
mDatabaseUser.addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
if (dataSnapshot.getValue() != null) {
newPost.child("replay").setValue(replay_val);
newPost.child("replaydate").setValue(ServerValue.TIMESTAMP);
newPost.child("uid").setValue(mCurrentUser.getUid());
newPost.child("replayname").setValue(dataSnapshot.child("name").getValue()).addOnCompleteListener(new OnCompleteListener<Void>() {
#Override
public void onComplete(#NonNull Task<Void> task) {
if (task.isSuccessful()) {
chickitem();
mAdapter.notifyDataSetChanged();
}
}
});
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
mProgress.dismiss();
}
}
}
}
private void getfirebaseData() {
mAdapter = new FirebaseRecyclerAdapter<Blog, BlogViewHolder>(
Blog.class,
R.layout.replay_row,
BlogViewHolder.class,
ReplayDatabase.child(mPost_key)
) {
#Override
protected void populateViewHolder(final BlogViewHolder viewHolder, final Blog model, int position) {
viewHolder.setReplay(model.getReplay());
viewHolder.setReplayname(model.getReplayname());
viewHolder.setReplaydate(model.getReplaydate());
viewHolder.setReplayimage(getApplicationContext(), model.getReplayimage());
}
};
mReplayBlogList.setAdapter(mAdapter);
}
public static class BlogViewHolder extends RecyclerView.ViewHolder {
View mView;
ImageView replay_imagee;
TextView recive_replay, post_replayname, post_replaydate;
public BlogViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void setReplay(String replay) {
recive_replay = mView.findViewById(R.id.replay_text);
recive_replay.setText(replay);
}
public void setReplayname(String replayname) {
post_replayname = mView.findViewById(R.id.replayer_name_field);
post_replayname.setText(replayname);
}
public void setReplaydate(Object relaydate) {
post_replaydate = mView.findViewById(R.id.post_replaydate);
Blog timeStamps = new Blog();
timeStamps.setDate(relaydate);
if (timeStamps.getDate()!=null){
String dateee = timeStamps.getDate().toString();
long times = Long.parseLong(dateee);
String timeAgoo = TimeAgo.getTimeAgo(times);
post_replaydate.setText(timeAgoo);
}
}
public void setReplayimage(final Context ctx, final String replayimage) {
replay_imagee = mView.findViewById(R.id.replay_image);
Picasso.with(ctx).load(replayimage).networkPolicy(NetworkPolicy.OFFLINE).into(replay_imagee, new Callback() {
#Override
public void onSuccess() {
}
#Override
public void onError() {
Picasso.with(ctx).load(replayimage).into(replay_imagee);
}
});
}
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == GALLERY_REQUEST && resultCode == RESULT_OK) {
Uri imageUri = data.getData();
CropImage.activity(imageUri)
.setGuidelines(CropImageView.Guidelines.ON)
.setAspectRatio(1, 1)
.start(this);
}
if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE) {
CropImage.ActivityResult result = CropImage.getActivityResult(data);
if (resultCode == RESULT_OK) {
mImagUri = result.getUri();
mselectImage.setImageURI(mImagUri);
} else if (resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE) {
Exception error = result.getError();
}
}
}
private void chickitem() {
final AtomicInteger count = new AtomicInteger();
ReplayDatabase.addListenerForSingleValueEvent(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
long numChildren = dataSnapshot.child(mPost_key).getChildrenCount();
if (numChildren == 0) {
emptyView.setVisibility(View.VISIBLE);
emptyView.setText("لا توجد تعليقات");
mReplayBlogList.setVisibility(View.INVISIBLE);
mNumbersOfComments.setText("لا توجد تعليقات");
} else {
mNumbersOfComments.setText("" + numChildren);
emptyView.setVisibility(View.VISIBLE);
emptyView.setText("التعليقات...");
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
#Override
public void onStart(){
super.onStart();
getfirebaseData();
}
#Override
public void onResume(){
super.onResume();
getfirebaseData();
}
#Override
public boolean onCreateOptionsMenu(Menu menu){
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
}
The screen looks like .
There are two comments. To see these comment I have to go back and reopen this Activity.

I'm not 100% sure about this, but I think you're missing the mReplayBlogList.notifyDataSetChanged(); after the line mReplayBlogList.setAdapter(mAdapter); in getfirebaseData().
Maybe you could give it a try. Let me know if it solved :)

How do I Query this in Android Studio using Firebase?

In my software I need a Query, how do I Query 2 information from the Database?? I need the "uid" and "book", check the link for watching my Database: https://i.stack.imgur.com/9TSt6.png
listWN = (RecyclerView) findViewById(R.id.listReading);
listWN.setLayoutManager(new LinearLayoutManager(this));
bookYouAreIn = getIntent().getStringExtra("book");
firebaseauth = FirebaseAuth.getInstance();
String currentUserId = firebaseauth.getCurrentUser().getUid();
mDatabase = FirebaseDatabase.getInstance().getReference("Data");
mQuery = mDatabase.orderByChild("book").equalTo(bookYouAreIn); **---> HOW DO I ADD HERE: AND mDatabase.orderByChild("uid").equalTo(firebaseauth.getCurrentUser().getUid());**
mDatabase.keepSynced(true);
if(!firebaseauth.getCurrentUser().getUid().equals(currentUserId)){
startActivity(new Intent(WordNote.this,LoginActivity.class));
finish();
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_secondmenu, menu);
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId() == R.id.action_addWords){
Intent postIntent = new Intent(WordNote.this, PostActivity.class);
postIntent.putExtra("bookToPost", bookYouAreIn);
startActivity(postIntent);
}
return super.onOptionsItemSelected(item);
}
#Override
protected void onStart() {
super.onStart();
final FirebaseRecyclerAdapter<MyReading, MyReadingViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter <MyReading, MyReadingViewHolder>
(
MyReading.class,
R.layout.list_reading,
MyReadingViewHolder.class,
mQuery )
{
#Override
protected void populateViewHolder(final MyReadingViewHolder viewHolder, final MyReading model, final int position) {
final String wordNote_key = getRef(position).getKey();
viewHolder.setWord(model.getWord());
viewHolder.setNote(model.getNote());
mDatabase.child(wordNote_key).addValueEventListener(new ValueEventListener() {
#Override
public void onDataChange(DataSnapshot dataSnapshot) {
String user = (String) dataSnapshot.child("uid").getValue();
String bookNow = (String) dataSnapshot.child("book").getValue();
if(firebaseauth.getCurrentUser().getUid().equals(user)){
mDatabase.child(wordNote_key).orderByChild("uid").equals(user);
}
else {
viewHolder.nView.setVisibility(View.GONE); **--> IT DOESN'T GO AWAY, IT KEEPS STAYING AS A BLANK VIEW**
}
}
#Override
public void onCancelled(DatabaseError databaseError) {
}
});
viewHolder.nView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent singleIntent = new Intent(WordNote.this, HandleWordNote.class);
singleIntent.putExtra("listWords", wordNote_key);
startActivity(singleIntent);
}
});
}
};
listWN.setAdapter(firebaseRecyclerAdapter);

See my answer from this post.
In your case, the field would be: uid_book: "OKtUxSleCGbU0F_Pasqua".
Hope it helps.