Issue
i am beginner, i want to create post app, which has like and comment button, but when i click like button, the RecyclerView getting (scrolling) back to top. i want it tobe like facebook or twitter, when click like it pop up there and not goig to top
MainActivity
private void loadPosts() {
DatabaseReference databaseReference=FirebaseDatabase.getInstance().getReference("Posts");
databaseReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
posts.clear();
for (DataSnapshot dataSnapshot1:dataSnapshot.getChildren()){
ModelPost modelPost=dataSnapshot1.getValue(ModelPost.class);
posts.add(modelPost);
adapterPosts=new AdapterPosts(getActivity(),posts);
recyclerView.setAdapter(adapterPosts);
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
Toast.makeText(getActivity(),databaseError.getMessage(),Toast.LENGTH_LONG).show();
}
});
}
myAdapter
@Override
public void onBindViewHolder(@NonNull final MyHolder holder, final int position) {
final String uid=modelPosts.get(position).getUid();
String nameh=modelPosts.get(position).getUname();
final String titlee=modelPosts.get(position).getTitle();
final String descri=modelPosts.get(position).getDescription();
final String ptime=modelPosts.get(position).getPtime();
String dp=modelPosts.get(position).getUdp();
String plike=modelPosts.get(position).getPlike();
final String image=modelPosts.get(position).getUimage();
String email=modelPosts.get(position).getUemail();
String comm=modelPosts.get(position).getPcomments();
final String pid=modelPosts.get(position).getPid();
Calendar calendar=Calendar.getInstance(Locale.ENGLISH);
calendar.setTimeInMillis(Long.parseLong(ptime));
String timedate= DateFormat.format("dd/MM/yyyy hh:mm aa",calendar).toString();
holder.name.setText(nameh);
holder.title.setText(titlee);
holder.description.setText(descri);
holder.time.setText(timedate);
holder.like.setText(plike + " Likes");
holder.comments.setText(comm + " Comments");
setLikes(holder,ptime);
try {
Picasso.with(context).load(dp).into(holder.picture);
} catch (Exception e) {
}
if(image.equals("noImage")){
holder.image.setVisibility(View.GONE);
}
else {
holder.image.setVisibility(View.VISIBLE);
try {
Picasso.with(context).load(image).into(holder.image);
}
catch (Exception e){
}
}
holder.more.setOnClickListener(new View.OnClickListener() {
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void onClick(View v) {
showMoreOptions(holder.more,uid, myuid,ptime,image);
}
});
holder.likebtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final int plike=Integer.parseInt(modelPosts.get(position).getPlike());
mprocesslike=true;
final String postid=modelPosts.get(position).getPtime();
liekeref.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if(mprocesslike){
if(dataSnapshot.child(postid).hasChild(myuid)){
postref.child(postid).child("plike").setValue(""+(plike-1));
liekeref.child(postid).child(myuid).removeValue();
mprocesslike=false;
}
else {
postref.child(postid).child("plike").setValue(""+(plike+1));
liekeref.child(postid).child(myuid).setValue("Liked");
mprocesslike=false;
addToHisNotification(""+uid,""+postid,"Liked Your Post");
}
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
});
holder.comment.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(context, PostDetailsActivity.class);
intent.putExtra("pid",ptime);
context.startActivity(intent);
}
});
holder.share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
BitmapDrawable bitmapDrawable=(BitmapDrawable)holder.image.getDrawable();
if(bitmapDrawable==null){
shareTextOnly(titlee,descri);
}
else {
Bitmap bitmap=bitmapDrawable.getBitmap();
shareImageandText(titlee,descri,bitmap);
}
}
});
holder.profile.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(context, ThereProfileActivity.class);
intent.putExtra("uid", uid);
context.startActivity(intent);
}
});
holder.like.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(context, PostLikedByActivity.class);
intent.putExtra("pid",ptime);
context.startActivity(intent);
}
});
}
private void shareTextOnly(String titlee, String descri) {
String sharebody= titlee + "\n" + descri;
Intent intentt=new Intent(Intent.ACTION_SEND);
intentt.setType("text/plain");
intentt.putExtra(Intent.EXTRA_SUBJECT,"Subject Here");
intentt.putExtra(Intent.EXTRA_TEXT,sharebody);
context.startActivity(Intent.createChooser(intentt,"Share Via"));
}
private void shareImageandText(String titlee, String descri, Bitmap bitmap) {
Uri uri=saveImageToShare(bitmap);
String sharebody= titlee + "\n" + descri;
Intent intent=new Intent(Intent.ACTION_SEND);
intent.putExtra(Intent.EXTRA_STREAM,uri);
intent.putExtra(Intent.EXTRA_TEXT,sharebody);
intent.putExtra(Intent.EXTRA_SUBJECT,"Subject Here");
intent.setType("image/png");
context.startActivity(Intent.createChooser(intent,"Share Via"));
}
private Uri saveImageToShare(Bitmap bitmap) {
File imagefolder=new File(context.getCacheDir(),"images");
Uri uri=null;
try {
imagefolder.mkdirs();
File file=new File(imagefolder,"shared_image.png");
FileOutputStream outputStream=new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG,90,outputStream);
outputStream.flush();
outputStream.close();
uri= FileProvider.getUriForFile(context,"com.xzuma99.askpedia.fileprovider",file);
}
catch (Exception e){
Toast.makeText(context,""+e.getMessage(),Toast.LENGTH_LONG).show();
}
return uri;
}
private void addToHisNotification(String hisUid,String pid,String notification){
String timestamp=""+System.currentTimeMillis();
HashMap<Object,String> hashMap=new HashMap<>();
hashMap.put("pid",pid);
hashMap.put("timestamp",timestamp);
hashMap.put("puid",hisUid);
hashMap.put("notification",notification);
hashMap.put("suid",myuid);
DatabaseReference reference=FirebaseDatabase.getInstance().getReference("Users");
reference.child(hisUid).child("Notifications").child(timestamp).setValue(hashMap)
.addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
}
});
}
private void setLikes(final MyHolder holder,final String pid) {
liekeref.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
if(dataSnapshot.child(pid).hasChild(myuid)){
holder.likebtn.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_star_liked,0,0,0);
holder.likebtn.setText("Liked");
}
else {
holder.likebtn.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_star_like,0,0,0);
holder.likebtn.setText("Like");
}
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
private void showMoreOptions(ImageButton more, String uid, String myuid, final String pid, final String image) {
PopupMenu popupMenu=new PopupMenu(context,more, Gravity.END);
if(uid.equals(myuid)){
popupMenu.getMenu().add(Menu.NONE,0,0,"Delete");
popupMenu.getMenu().add(Menu.NONE,1,0,"Edit");
}
popupMenu.getMenu().add(Menu.NONE,2,0,"View Post");
popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
if(item.getItemId()==0){
beginDelete(pid,image);
}
else if(item.getItemId()==1){
Intent intent=new Intent(context, AddPostActivity.class);
intent.putExtra("key","editpost");
intent.putExtra("editpostId",pid);
context.startActivity(intent);
}
else if(item.getItemId()==2){
Intent intent=new Intent(context, PostDetailsActivity.class);
intent.putExtra("pid",pid);
context.startActivity(intent);
}
return false;
}
});
popupMenu.show();
}
private void beginDelete(String pid, String image) {
if(image.equals("noImage")){
deleteWithoutImage(pid);
deletelike(pid);
}
else {
deltewithImage(pid,image);
deletelike(pid);
}
}
private void deletelike(String pid) {
Query query= FirebaseDatabase.getInstance().getReference("Likes").child(pid);
query.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
dataSnapshot.getRef().removeValue();
Toast.makeText(context,"Deleted Sucessfully",Toast.LENGTH_LONG).show();
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
private void deltewithImage(final String pid, String image) {
final ProgressDialog pd=new ProgressDialog(context);
pd.setMessage("Deleting");
StorageReference picref= FirebaseStorage.getInstance().getReferenceFromUrl(image);
picref.delete().addOnSuccessListener(new OnSuccessListener<Void>() {
@Override
public void onSuccess(Void aVoid) {
Query query= FirebaseDatabase.getInstance().getReference("Posts").orderByChild("ptime").equalTo(pid);
query.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot dataSnapshot1:dataSnapshot.getChildren()){
dataSnapshot1.getRef().removeValue();
}
pd.dismiss();
Toast.makeText(context,"Deleted Sucessfully",Toast.LENGTH_LONG).show();
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
}).addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
}
});
}
private void deleteWithoutImage(String pid) {
final ProgressDialog pd=new ProgressDialog(context);
pd.setMessage("Deleting");
Query query= FirebaseDatabase.getInstance().getReference("Posts").orderByChild("ptime").equalTo(pid);
query.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
for (DataSnapshot dataSnapshot1:dataSnapshot.getChildren()){
dataSnapshot1.getRef().removeValue();
}
pd.dismiss();
Toast.makeText(context,"Deleted Sucessfully",Toast.LENGTH_LONG).show();
}
@Override
public void onCancelled(@NonNull DatabaseError databaseError) {
}
});
}
@Override
public int getItemCount() {
return modelPosts.size();
}
class MyHolder extends RecyclerView.ViewHolder{
ImageView picture,image;
TextView name,time,title,description,like,comments;
ImageButton more;
Button likebtn,comment,share;
LinearLayout profile;
public MyHolder(@NonNull View itemView) {
super(itemView);
picture=itemView.findViewById(R.id.picturetv);
image=itemView.findViewById(R.id.pimagetv);
name=itemView.findViewById(R.id.unametv);
time=itemView.findViewById(R.id.utimetv);
more=itemView.findViewById(R.id.morebtn);
title=itemView.findViewById(R.id.ptitletv);
description=itemView.findViewById(R.id.descript);
like=itemView.findViewById(R.id.plikeb);
comments=itemView.findViewById(R.id.pcommentco);
likebtn=itemView.findViewById(R.id.like);
comment=itemView.findViewById(R.id.comment);
share=itemView.findViewById(R.id.share);
profile=itemView.findViewById(R.id.profilelayout);
}
}
}
which has like and comment button, but when i click like button, the RecyclerView getting (scrolling) back to top. i want it tobe like facebook or twitter, when click like it pop up there and not goig to top
Solution
You can take two approaches to get this working.
- do not repopulate the recycler view on the button being clicked.
Use the method
yourRecyclerViewName.findViewHolderForAdapterPosition(pos); for getting the reference of the particular view you want to change the like symbol of. And then change it's properties .
- repopulate but save the scrollposition of the like button so that it moves to that location automatically.
use
yourRecyclerViewName.scrollToPosition(pos);
how to scroll to position StackOverflow answer
Answered By - Narendra_Nath
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