这是我的帖子:
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);
}
}
}
使用翻新版,可正确填充recyclerview:
postList.addAll(response.body());
postAdapter = new PostAdapter(postList, ProfileActivity.this);
recyclerView.setAdapter(postAdapter);
我还有一个Editext,用户可以在其中更新 text_wall_post 的值;我现在要更新recyclerView的项目参数 text_wall_post 吗?
如何更新recyclerView项目的特定参数?
编辑: 我发现:
postList.set(1, new PostItems("1","1176", "some text update here", ..................));
postAdapter.notifyItemChanged(1);
在我的recyclerView中,我有20多个参数。
这是什么工作,但我希望有一种更干净的方法来仅更新所需的参数,而不更新所有参数。
感谢您的帮助。
答案 0 :(得分:1)
您可以更改一项而无需创建新项。
首先进行设置器(如您创建的获取器)来更改对象的特定参数(在这种情况下为postItems
)
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;
}
...
...
.........
...
...
}
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)