我正在尝试使用notifyDataSetchanged()在updateList()中更新我的适配器。但是对于recyclerview不起作用。我可以在updateList()中看到列表大小,并显示实际结果,但只有reclerview没有更新。这个类是按照MVVM设计模式设计的。
public class TasksAdapter extends RecyclerView.Adapter<TasksAdapter.TasksAdapterViewHolder> {
private static final String TAG = TasksAdapter.class.getSimpleName();
static ArrayList<ItemModel> list;
static Context mContext;
private Fragment fragment;
private int row_index = -1;
private SessionManager session;
// SelectColorVM colorVM;
public TasksAdapter(Fragment fragment, Context context, ArrayList<ItemModel> itemList) {
this.mContext = context;
this.list = itemList;
this.fragment = fragment;
session = new SessionManager(fragment.getContext());
}
public void updateList(ArrayList<ItemModel> itemList){
list.clear();
this.list = itemList;
notifyDataSetChanged();
}
@Override
public TasksAdapterViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
TasksItemBinding binding =
DataBindingUtil.inflate(LayoutInflater.from(parent.getContext()), R.layout.tasks_item,
parent, false);
return new TasksAdapter.TasksAdapterViewHolder(binding);
}
@Override
public void onBindViewHolder(TasksAdapterViewHolder holder, final int position) {
holder.binding.setViewModel(list.get(position));
if(position == 0 && list.get(position).btnText.get().toString().length() > 0)
holder.binding.btnUpdate.setVisibility(View.VISIBLE);
else
holder.binding.btnUpdate.setVisibility(View.INVISIBLE);
holder.binding.layoutItem.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// row_index = position;
// notifyDataSetChanged();
Fragment fragment = new DetailFragment();
FragmentManager manager = ((FragmentActivity) mContext).getSupportFragmentManager();
FragmentTransaction fragmentTransaction = manager.beginTransaction();
Bundle bundle = new Bundle();
ItemModel item = list.get(position);
bundle.putSerializable("item", item);
fragment.setArguments(bundle);
fragmentTransaction.replace(R.id.id_frame, fragment, "details");
fragmentTransaction.addToBackStack("details");
fragmentTransaction.commit();
}
});
holder.binding.btnUpdate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
HashMap<String, String> user = session.getUserDetails();
if(list.get(position).btnText.get().equals("Task Start")){
LandingEngine.updateStatusAndSetStartTimeForRequest(fragment, user.get(SessionManager.KEY_CLEANER_ID), list.get(position).sid.get().toString());
} else if(list.get(position).btnText.get().equals("Task Complete")){
LandingEngine.updateStatusAndSetCompleteTimeForRequest(fragment, user.get(SessionManager.KEY_CLEANER_ID), list.get(position).sid.get().toString());
}
}
});
}
@Override
public int getItemCount() {
return list.size();
}
public static class TasksAdapterViewHolder extends RecyclerView.ViewHolder {
TasksItemBinding binding;
public TasksAdapterViewHolder(TasksItemBinding rowbinding) {
super(rowbinding.getRoot());
this.binding = rowbinding;
}
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getItemViewType(int position) {
return position;
}
}
我正在像下面这样从我的片段调用适配器:
if(list.size() > 0) {
if(adapter == null) {
view.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(fragment.getContext());
view.setLayoutManager(mLayoutManager);
adapter = new TasksAdapter(fragment, fragment.getContext(), list);
view.setAdapter(adapter);
view.addItemDecoration(new DividerItemDecoration(fragment.getContext()));
} else {
adapter.updateList(list);
// view.getAdapter().notifyDataSetChanged();
// view.invalidate();
}
}
请检查这个,让我知道我哪里出错了。提前致谢。
updateList(list);
中使用 **list.clear();
**? - AskNilesh