How to make a like function in Firebase?
up vote
0
down vote
favorite
There is an application in it posts. Likes, done as follows:
postReference = firebaseDatabase.getInstance().getReference().child("Posts");
holder.likeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final DatabaseReference likeReference = postReference.child(listUserId).child("Likes");
likeReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (!dataSnapshot.hasChild(currentUserId)) {
likeReference.child(currentUserId).removeValue();
} else {
likeReference.child(currentUserId).setValue("Like");
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
The problem is that after pressing the button, the record in the database begins to be added and deleted without stopping. How to fix it? My DB:
my_database
java
android 
firebase firebase-realtime-database edited Nov 10 at 9:55
Alex Mamo
38.6k72758
asked Nov 10 at 9:29
Binary
51
add a comment |
up vote
0
down vote
favorite
There is an application in it posts. Likes, done as follows:
postReference = firebaseDatabase.getInstance().getReference().child("Posts");
holder.likeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final DatabaseReference likeReference = postReference.child(listUserId).child("Likes");
likeReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (!dataSnapshot.hasChild(currentUserId)) {
likeReference.child(currentUserId).removeValue();
} else {
likeReference.child(currentUserId).setValue("Like");
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
The problem is that after pressing the button, the record in the database begins to be added and deleted without stopping. How to fix it? My DB:
my_database
java
android firebase firebase-realtime-database edited Nov 10 at 9:55
Alex Mamo
38.6k72758
asked Nov 10 at 9:29
Binary
51
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
There is an application in it posts. Likes, done as follows:
postReference = firebaseDatabase.getInstance().getReference().child("Posts");
holder.likeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final DatabaseReference likeReference = postReference.child(listUserId).child("Likes");
likeReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (!dataSnapshot.hasChild(currentUserId)) {
likeReference.child(currentUserId).removeValue();
} else {
likeReference.child(currentUserId).setValue("Like");
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
The problem is that after pressing the button, the record in the database begins to be added and deleted without stopping. How to fix it? My DB:
my_database
java
android firebase firebase-realtime-database edited Nov 10 at 9:55
Alex Mamo
38.6k72758
asked Nov 10 at 9:29
Binary
51
There is an application in it posts. Likes, done as follows:
postReference = firebaseDatabase.getInstance().getReference().child("Posts");
holder.likeBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final DatabaseReference likeReference = postReference.child(listUserId).child("Likes");
likeReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if (!dataSnapshot.hasChild(currentUserId)) {
likeReference.child(currentUserId).removeValue();
} else {
likeReference.child(currentUserId).setValue("Like");
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}
The problem is that after pressing the button, the record in the database begins to be added and deleted without stopping. How to fix it? My DB:
my_database
java
android firebase firebase-realtime-database java
android firebase firebase-realtime-database edited Nov 10 at 9:55
Alex Mamo
38.6k72758
asked Nov 10 at 9:29
Binary
51
edited Nov 10 at 9:55
Alex Mamo
38.6k72758
asked Nov 10 at 9:29
Binary
51
edited Nov 10 at 9:55
Alex Mamo
38.6k72758
edited Nov 10 at 9:55
Alex Mamo
38.6k72758
edited Nov 10 at 9:55
Alex Mamo
38.6k72758
38.6k72758
asked Nov 10 at 9:29
Binary
51
asked Nov 10 at 9:29
Binary
51
asked Nov 10 at 9:29
Binary
51
51
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
accepted
To solve this, please change the following line of code:
likeReference.addValueEventListener(new ValueEventListener() {}
to
likeReference.addListenerForSingleValueEvent(new ValueEventListener() {}
See addListenerForSingleValueEvent official documentation:
Add a listener for a single change in the data at this location.
Using addValueEventListener it means that you are keeping the listener active all the time. To remove the listener, please see my answer from this post.
answered Nov 10 at 9:50
Alex Mamo
38.6k72758
Thank a lot, everything works fine.
– Binary
Nov 10 at 15:10
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53237624%2fhow-to-make-a-like-function-in-firebase%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
accepted
To solve this, please change the following line of code:
likeReference.addValueEventListener(new ValueEventListener() {}
to
likeReference.addListenerForSingleValueEvent(new ValueEventListener() {}
See addListenerForSingleValueEvent official documentation:
Add a listener for a single change in the data at this location.
Using addValueEventListener it means that you are keeping the listener active all the time. To remove the listener, please see my answer from this post.
answered Nov 10 at 9:50
Alex Mamo
38.6k72758
Thank a lot, everything works fine.
– Binary
Nov 10 at 15:10
add a comment |
up vote
0
down vote
accepted
To solve this, please change the following line of code:
likeReference.addValueEventListener(new ValueEventListener() {}
to
likeReference.addListenerForSingleValueEvent(new ValueEventListener() {}
See addListenerForSingleValueEvent official documentation:
Add a listener for a single change in the data at this location.
Using addValueEventListener it means that you are keeping the listener active all the time. To remove the listener, please see my answer from this post.
answered Nov 10 at 9:50
Alex Mamo
38.6k72758
Thank a lot, everything works fine.
– Binary
Nov 10 at 15:10
add a comment |
up vote
0
down vote
accepted
up vote
0
down vote
accepted
To solve this, please change the following line of code:
likeReference.addValueEventListener(new ValueEventListener() {}
to
likeReference.addListenerForSingleValueEvent(new ValueEventListener() {}
See addListenerForSingleValueEvent official documentation:
Add a listener for a single change in the data at this location.
Using addValueEventListener it means that you are keeping the listener active all the time. To remove the listener, please see my answer from this post.
answered Nov 10 at 9:50
Alex Mamo
38.6k72758
To solve this, please change the following line of code:
likeReference.addValueEventListener(new ValueEventListener() {}
to
likeReference.addListenerForSingleValueEvent(new ValueEventListener() {}
See addListenerForSingleValueEvent official documentation:
Add a listener for a single change in the data at this location.
Using addValueEventListener it means that you are keeping the listener active all the time. To remove the listener, please see my answer from this post.
answered Nov 10 at 9:50
Alex Mamo
38.6k72758
answered Nov 10 at 9:50
Alex Mamo
38.6k72758
answered Nov 10 at 9:50
Alex Mamo
38.6k72758
answered Nov 10 at 9:50
Alex Mamo
38.6k72758
38.6k72758
Thank a lot, everything works fine.
– Binary
Nov 10 at 15:10
add a comment |
Thank a lot, everything works fine.
– Binary
Nov 10 at 15:10
Thank a lot, everything works fine.
– Binary
Nov 10 at 15:10
Thank a lot, everything works fine.
– Binary
Nov 10 at 15:10
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53237624%2fhow-to-make-a-like-function-in-firebase%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
