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Pushing first visible item using RecylerView


Pushing first visible item using RecylerView

By : hele
Date : November 19 2020, 12:41 AM
With these it helps Add the following code to the place where u change the adapter contents (does not matter before or after).
code :
if (layoutManager.findFirstCompletelyVisibleItemPosition() == 0) {
    layoutManager.scrollToPosition(0);
}


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Keep track of item in recylerview?

Keep track of item in recylerview?


By : GarrettW
Date : March 29 2020, 07:55 AM
This might help you The easiest solution -but not the most correct one- would be as the following:
add a boolean attribute isSuccessful to the message class. when you send the message and the get the response back from the server change the corresponding message. and call notifyDataSetChanged on the Adapter.
OnclickListener on RecylerView and getting the Id of clicked Item

OnclickListener on RecylerView and getting the Id of clicked Item


By : Ranjith P
Date : March 29 2020, 07:55 AM
it fixes the issue I need to set onClickListener on RecyclerView which gets the Json Id of an Item Clicked and redirects to the fragment which displays the details of the product based on that Json ID. How Can I implement this in adapter? I am stuck here. I was able to set onClickListener but I couldn't get the Json ID.
code :
@Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        holder.name.setText(ads.get(position).getTitle());
        holder.details.setText("Rs. " +ads.get(position).getPrice().toString()+ "/-");        Glide.with(context).load(ads.get(position).getPhoto1()).into(holder.thumbnail);
        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String id=ads.get(position).getId();
                //You can call detail fragment here
            }
        });
    }
Recylerview not visible in Android App

Recylerview not visible in Android App


By : Joe
Date : March 29 2020, 07:55 AM
it fixes the issue Okay! It is about Firebase. You are not notifying your adapter after adding data to dataset. Do
code :
if(placardsRecyclerViewAdapter != null)
    placardsRecyclerViewAdapter.notifyDataSetChanged();
private ValueEventListener postListener = null;

private void loadMyPlacardView(View view) {

    List<Post> postList = new ArrayList<>();
    RecyclerView placardsRecyclerView = view.findViewById(R.id.fp_placards_recyclerView);
    LinearLayoutManager postsLayoutManager = new LinearLayoutManager(view.getContext());
    placardsRecyclerView.setHasFixedSize(true);
    placardsRecyclerView.setLayoutManager(postsLayoutManager);
    PlacardsRecyclerViewAdapter placardsRecyclerViewAdapter = new PlacardsRecyclerViewAdapter(postList);
    placardsRecyclerView.setAdapter(placardsRecyclerViewAdapter);

    //Fetching data from Firebase
    postListener = new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {

                if (dataSnapshot.hasChildren()) {
                    for (DataSnapshot ds : dataSnapshot.getChildren()) {
                        Post thisPost = ds.getValue(Post.class);
                        postList.add(thisPost);
                    }
                    if(placardsRecyclerViewAdapter != null)
                        placardsRecyclerViewAdapter.notifyDataSetChanged(); //Now postList has data so notify adapter.
                }
            }

            @Override
            public void onCancelled(DatabaseError databaseError) {
                // Getting Post failed, log a message
                Log.e("DB error", "loadPost:onCancelled", databaseError.toException());
            }
    };
    databaseReference.addListenerForSingleValueEvent(valueEventListener);
}
Recylerview not visible inside scrollview or nestedScrollview

Recylerview not visible inside scrollview or nestedScrollview


By : cerise
Date : March 29 2020, 07:55 AM
Hope that helps Follow this sample will get idea where you done mistake. Main Line is : android:fillViewport="true".
RecylerView Scrolling issue data has been changed when recylerview scroll up and down

RecylerView Scrolling issue data has been changed when recylerview scroll up and down


By : jing Mei
Date : September 27 2020, 04:00 PM
wish of those help You can't use a variable like counter to get the position of your item's position in RecyclerView. You have to use the position variable provided in the onBindViewHolder() method of have a consistent behavior.
In short, you have to decide how your view should look using the position variable inside onBindViewHolder() method.
code :
    int modulus = position % 3;
    switch (modulus){

        case 0:
            //handle logic for red
            break;
        case 1:
            //handle logic for green
            break;
        default:
            //handle logic for blue

    }
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