here is my post item:
public class PostItems {
private String id_wall_post, id_user, text_wall_post, ..........;
public PostItems(String id_wall_post, String id_user, String text_wall_post, ..............) {
this.id_wall_post = id_wall_post;
this.id_user = id_user;
this.text_wall_post = text_wall_post;
}
String get_id_wall_post() {
return id_wall_post;
}
String get_id_user() {
return id_user;
}
String get_text_wall_post() {
return text_wall_post;
}
...
...
.........
...
...
}
Here my adapter:
public class PostAdapter extends RecyclerView.Adapter<PostAdapter.PostViewHolder> {
private List<PostItems> postList;
private Context context;
PostAdapter(List<PostItems> postList, Context context) {
this.postList = postList;
this.context = context;
}
@NonNull
@Override
public PostViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_view_wall_post, parent, false);
return new PostViewHolder(v);
}
@Override
public void onBindViewHolder(@NonNull PostViewHolder holder, int position) {
PostItems post_items = postList.get(position);
...
...
.........
...
...
}
@Override
public int getItemCount() {
return postList.size();
}
static class PostViewHolder extends RecyclerView.ViewHolder {
PostViewHolder(@NonNull View itemView) {
super(itemView);
}
}
}
Using retrofit the recyclerview is populated correctly:
postList.addAll(response.body());
postAdapter = new PostAdapter(postList, ProfileActivity.this);
recyclerView.setAdapter(postAdapter);
I also have an Editext where user can update the value of text_wall_post ; I want now to update the item parameter text_wall_post of the recyclerView ?
How could I update a recyclerView item specific parameter ?
EDIT: I have found that:
postList.set(1, new PostItems("1","1176", "some text update here", ..................));
postAdapter.notifyItemChanged(1);
In my recyclerView, I have more than 20 parameters.
Which work but I want a more clean way to update only the needed parameter without updating all the parameters.
Thanks for Any help.
You can change an item without creating a new one. First make setters (like the getters you made) to change a specific parameter from an object( postItems
in this case)
public class PostItems {
private String id_wall_post, id_user, text_wall_post, ..........;
public PostItems(String id_wall_post, String id_user, String text_wall_post, ..............) {
this.id_wall_post = id_wall_post;
this.id_user = id_user;
this.text_wall_post = text_wall_post;
}
String get_id_wall_post() {
return id_wall_post;
}
String get_id_user() {
return id_user;
}
String get_text_wall_post() {
return text_wall_post;
}
public void setIdWallPost(String idWallpost){
this.id_wall_post = idWallpost;
}
public void setIdUser(String idUser){
this.id_user = idWallUser;
}
public void setTextWallPost(String textWallPost){
this.text_wall_post = textWallPost;
}
...
...
.........
...
...
}
You can also make android studio generate them for you by pressing Alt+Inser
> Setter
Then get the item with specific position from postList
and update the parameter you want
postList.get(position).setTextWallPost("new value here");
And finally call
postAdapter.notifyItemChanged (position)
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