Java 如何更新复杂的recyclerview项参数?

Java 如何更新复杂的recyclerview项参数?,java,android-recyclerview,Java,Android Recyclerview,以下是我的帖子: 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;

以下是我的帖子:

    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;
    }
    ...
    ...
    .........
    ...
    ...
}
这里是我的适配器:

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);
        }
    }
}
我还有一个Editext,用户可以在其中更新text\u wall\u post的值;现在我想更新recyclerView的项目参数text\u wall\u post

如何更新recyclerView项目特定参数

编辑: 我发现:

在我的recyclerView中,我有20多个参数。

这是可行的,但我想要一种更干净的方法,只更新所需的参数,而不更新所有参数


感谢您的帮助。

您可以更改项目,而无需创建新项目。 首先创建setter(就像您创建的getter)来更改对象中的特定参数(
positems
在本例中)

您还可以通过按
Alt+Inser
>
Setter

然后从
postList
获取具有特定位置的项目,并更新所需的参数

postList.get(position).setTextWallPost("new value here");
最后打电话给

postAdapter.notifyItemChanged (position)

我不确定您的问题,但似乎回收视图实际上是空的,因为您没有为任何项目设置值。@首先,回收视图不是空的,它是在改装查询成功后填充的。请在特定位置在
postList
中更新
text\u wall\u pos
,然后调用
postAdapter.notifyItemChanged(position)
尝试更新postList中的text\u wall\u pos,如何更新?我不知道怎么做,所以我来这里寻求帮助。
    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;
}
...
...
.........
...
...
}
postList.get(position).setTextWallPost("new value here");
postAdapter.notifyItemChanged (position)