In my blog App in post detail Activity i added comments list with simple RecyclerView Adapter that was working fine but i am not able to add delete button for comment so moved to FireBase RecyclerView now i have lots of problems
- it not updating in real time
- when i comment that not pop out above the edit text layout when i close edit text box then it show my comments
- when i write a comment and hit comment button it not show comment but when i writing the second comment on same time after writing three or four line the previous comment pop out and the edit text bot hide under the keyboard why this happening
Activity Code:
mCommentsRecycler.setLayoutManager(mlinearLayoutManager);
}
@Override
public void onStart() {
super.onStart();
// Add value event listener to the post
// [START post_value_event_listener]
ValueEventListener postListener = new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
// Get Post object and use the values to update the UI
Post post = dataSnapshot.getValue(Post.class);
// [START_EXCLUDE]
// mAuthorView.setText(post.author);
mTitleView.setText(post.title);
mBodyView.setText(post.body);
final String formImage = String.valueOf(post.postDetailPic);
// [END_EXCLUDE]
if (formImage.length() > 0) {
Picasso.with(getApplicationContext()).load(formImage)
.networkPolicy(NetworkPolicy.OFFLINE)
.into(postPic, new Callback() {
@Override
public void onSuccess() {
}
@Override
public void onError() {
//Try again online if cache failed
Picasso.with(getApplicationContext())
.load(formImage)
//.error(R.drawable.ic_warning_black_24dp)
.into(postPic, new Callback() {
@Override
public void onSuccess() {
}
@Override
public void onError() {
Log.v("Picasso", "Could not fetch image");
}
});
}
});
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
// Getting Post failed, log a message
Log.w(TAG, "loadPost:onCancelled", databaseError.toException());
// [START_EXCLUDE]
Toast.makeText(PostDetailActivity.this, "Failed to load post.",
Toast.LENGTH_SHORT).show();
// [END_EXCLUDE]
}
};
mPostReference.addValueEventListener(postListener);
// [END post_value_event_listener]
// Keep copy of post listener so we can remove it when app stops
mPostListener = postListener;
// Listen for comments
mAdapter = new CommentAdepter(Comment.class, CommentViewHolder.class, R.layout.item_comment, mCommentsReference, this);
mCommentsRecycler.setAdapter(mAdapter);
}
@Override
public void onStop() {
super.onStop();
// Remove post value event listener
if (mPostListener != null) {
mPostReference.removeEventListener(mPostListener);
}
// Clean up comments listener
mAdapter.cleanup();
}
@Override
public void onClick(View v) {
int i = v.getId();
if (i == R.id.button_post_comment) {
postComment();
}
}
private void postComment() {
FirebaseUser mUser = FirebaseAuth.getInstance().getCurrentUser();
assert mUser != null;
final String uid = mUser.getUid();
final DatabaseReference commentDb = FirebaseDatabase.getInstance().getReference().child("Users").child(uid);
commentDb.addListenerForSingleValueEvent(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
// Get user information
User user = dataSnapshot.getValue(User.class);
String authorName = user.name;
String commentUserPic = user.ProfilePic;
// Create new comment object
String commentText = mCommentField.getText().toString();
HashMap < String, Object > dateCreated; {
//Otherwise make a new object set to ServerValue.TIMESTAMP
dateCreated = new HashMap < String, Object > ();
dateCreated.put("timeStamp", ServerValue.TIMESTAMP);
}
HashMap < String, Boolean > commenter_id; {
commenter_id = new HashMap < String, Boolean > ();
commenter_id.put(getUid(), true);
}
Comment comment = new Comment(uid, authorName, commentText, commentUserPic, dateCreated, commenter_id);
// Push the comment, it will appear in the list
mCommentsReference.push().setValue(comment);
// Clear the field
mCommentField.setText(null);
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private String getUid() {
return FirebaseAuth.getInstance().getCurrentUser().getUid();
}
private static class CommentViewHolder extends RecyclerView.ViewHolder {
public CommentViewHolder(View itemView) {
super(itemView);
authorView = (TextView) itemView.findViewById(R.id.comment_author);
bodyView = (TextView) itemView.findViewById(R.id.comment_body);
postingTime = (TextView) itemView.findViewById(R.id.comment_post_time);
rm_comment = (Button) itemView.findViewById(R.id.remove_comment);
}
public void setImage(String images) {
this.imageDp = images;
userPic = (ImageView) itemView.findViewById(R.id.comment_photo);
Picasso.with(context).load(imageDp).into(userPic);
}
void bindToPost(Comment comment, View.OnClickListener starClickListener) {
authorView.setText(comment.author);
bodyView.setText(comment.text);
setImage(comment.commentPic);
setViewValue(comment.getTimestampCreatedLong());
rm_comment.setOnClickListener(starClickListener);
}
}
private class CommentAdepter extends FirebaseRecyclerAdapter < Comment, CommentViewHolder > {
private Context mContext;
private List < String > mCommentIds = new ArrayList < > ();
private List < Comment > mComments = new ArrayList < > ();
private String mkey;
CommentAdepter(Class < Comment > CommentClass, Class < CommentViewHolder > viewHolderClass, int modelLayout, DatabaseReference ref, final Context context) {
super(CommentClass, modelLayout, viewHolderClass, mCommentsReference);
mContext = context;
// Create child event listener
// [START child_event_listener_recycler]
ChildEventListener childEventListener = new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String previousChildName) {
Log.d(TAG, "onChildAdded:" + dataSnapshot.getKey());
// A new comment has been added, add it to the displayed list
Comment comment = dataSnapshot.getValue(Comment.class);
// mkey = dataSnapshot.getKey();
// [START_EXCLUDE]
// Update RecyclerView
mCommentIds.add(dataSnapshot.getKey());
mComments.add(comment);
notifyItemInserted(mComments.size() - 1);
// [END_EXCLUDE]
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String previousChildName) {
Log.d(TAG, "onChildChanged:" + dataSnapshot.getKey());
// A comment has changed, use the key to determine if we are displaying this
// comment and if so displayed the changed comment.
Comment newComment = dataSnapshot.getValue(Comment.class);
String commentKey = dataSnapshot.getKey();
// [START_EXCLUDE]
int commentIndex = mCommentIds.indexOf(commentKey);
if (commentIndex > -1) {
// Replace with the new data
mComments.set(commentIndex, newComment);
// Update the RecyclerView
notifyItemChanged(commentIndex);
} else {
Log.w(TAG, "onChildChanged:unknown_child:" + commentKey);
}
// [END_EXCLUDE]
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
Log.d(TAG, "onChildRemoved:" + dataSnapshot.getKey());
// A comment has changed, use the key to determine if we are displaying this
// comment and if so remove it.
String commentKey = dataSnapshot.getKey();
// [START_EXCLUDE]
int commentIndex = mCommentIds.indexOf(commentKey);
if (commentIndex > -1) {
// Remove data from the list
mCommentIds.remove(commentIndex);
mComments.remove(commentIndex);
// Update the RecyclerView
notifyItemRemoved(commentIndex);
} else {
Log.w(TAG, "onChildRemoved:unknown_child:" + commentKey);
}
// [END_EXCLUDE]
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String previousChildName) {
Log.d(TAG, "onChildMoved:" + dataSnapshot.getKey());
// A comment has changed position, use the key to determine if we are
// displaying this comment and if so move it.
Comment movedComment = dataSnapshot.getValue(Comment.class);
String commentKey = dataSnapshot.getKey();
// ...
}
@Override
public void onCancelled(DatabaseError databaseError) {
Log.w("PostDetailActivity", "postComments:onCancelled", databaseError.toException());
Toast.makeText(mContext, "Failed to load comments.",
Toast.LENGTH_SHORT).show();
}
};
ref.addChildEventListener(childEventListener);
// [END child_event_listener_recycler]
// Store reference to listener so it can be removed on app stop
}
@Override
public int getItemCount() {
return mComments.size();
}
@Override
protected void populateViewHolder(final CommentViewHolder viewHolder, final Comment model, final int position) {
final DatabaseReference commentRef = getRef(position);
final String commentKey = commentRef.getKey();
if (model.commenter_id.containsKey(gUid())) {
viewHolder.rm_comment.setVisibility(View.VISIBLE);
}
viewHolder.bindToPost(model, new View.OnClickListener() {
@Override
public void onClick(View view) {
Toast.makeText(mContext, "clicked " + commentKey, Toast.LENGTH_SHORT).show();
mCommentsReference.child(commentKey).removeValue();
}
});
}
}
private String gUid() {
return FirebaseAuth.getInstance().getCurrentUser().getUid();
}
}
if u need layout file please comment....
