java - 在 TAB 1 的 RecyclerView 中添加数据时更新 TAB 2 Recyclerview
问题描述
我有种to-do app。在个人资料活动中，有 2 个选项卡。
To-do和Done。在选项卡 1 中，用户可以将他们的“待办事项”检查为“完成”。在这种情况下，我想更新TAB 2's recyclerview.
我尝试了几件事，但没有奏效。这是 TAB 1 代码，它与 TAB 2 几乎相同。
选项卡 1 类
公共类 Tab_Profile_1 扩展片段 {
private RecyclerView recyclerView_tab_todo;
private List<Model_ListItem> itemList;
private Adapter_Profile_ToDo adapter_profile_toDo;
SharedPreferences mSharedPref;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_profile_tab_1, container, false);
//TO-DO
//
recyclerView_tab_todo = view.findViewById(R.id.recyclerView_tab_todo);
//
fetchUserToDo();
return view;
}
public void fetchUserToDo() {
itemList = new ArrayList<>();
//First Settings
mSharedPref = PreferenceManager.getDefaultSharedPreferences(getContext());
String session_user_id = mSharedPref.getString("session_user_id", "");
API_Service api_service = Client.getRetrofitInstance().create(API_Service.class);
Call<List<Model_ListItem>> call = api_service.fetchUserToDo(session_user_id);
call.enqueue(new Callback<List<Model_ListItem>>() {
@Override
public void onResponse(Call<List<Model_ListItem>> call, Response<List<Model_ListItem>> response) {
itemList = response.body();
adapter_profile_toDo = new Adapter_Profile_ToDo(getContext(), itemList);
recyclerView_tab_todo.setHasFixedSize(true);
LinearLayoutManager layoutManager
= new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false);
recyclerView_tab_todo.setLayoutManager(layoutManager);
recyclerView_tab_todo.setAdapter(adapter_profile_toDo);
}
@Override
public void onFailure(Call<List<Model_ListItem>> call, Throwable t) {
}
});
}}
TAB 1 RecyclerView 适配器
公共类 Adapter_Profile_ToDo 扩展 RecyclerView.Adapter {
private Context context;
private List<Model_ListItem> itemList;
private String url_extension_images = URL_Extension.url_extension_images;
SharedPreferences mSharedPref;
ProgressDialog progressDialog;
View view;
public Adapter_Profile_ToDo(Context context, List<Model_ListItem> itemList) {
this.context = context;
this.itemList = itemList;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_profile_todo, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, final int position) {
Glide.with(context).load(url_extension_images + itemList.get(position).getItem_image()).into(holder.imageView_profile_todo);
holder.textView_profile_todo_name.setText(itemList.get(position).getItem_name());
holder.textView_profile_todo_desc.setText(itemList.get(position).getItem_description());
holder.layout_profile_todo_detail.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//detail
}
});
holder.layout_profile_todo_add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final AlertDialog.Builder builder = new AlertDialog.Builder(view.getRootView().getContext(), R.style.AlertStyle);
builder.setTitle("\"" + itemList.get(position).getItem_name() + "\"" + "\n");
builder.setIcon(R.drawable.ic_bookmark);
builder.setPositiveButton("YAPTIM", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
showProgressDialog();
addDone("" + itemList.get(position).getItem_id(), position);
}
});
builder.setNegativeButton("SİL", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
showProgressDialog();
deleteUserToDo("" + itemList.get(position).getItem_id(), position);
}
});
builder.setNeutralButton("İptal", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.show();
}
});
}
@Override
public int getItemCount() {
return itemList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
ImageView imageView_profile_todo;
TextView textView_profile_todo_name, textView_profile_todo_desc;
LinearLayout layout_profile_todo_detail, layout_profile_todo_add;
public ViewHolder(View itemView) {
super(itemView);
imageView_profile_todo = itemView.findViewById(R.id.imageView_profile_todo);
textView_profile_todo_name = itemView.findViewById(R.id.textView_profile_todo_name);
textView_profile_todo_desc = itemView.findViewById(R.id.textView_profile_todo_desc);
layout_profile_todo_detail = itemView.findViewById(R.id.layout_profile_todo_detail);
layout_profile_todo_add = itemView.findViewById(R.id.layout_profile_todo_add);
}
}
public void deleteUserToDo(final String listId, final int clicked) {
mSharedPref = PreferenceManager.getDefaultSharedPreferences(context);
String session_user_id = mSharedPref.getString("session_user_id", "");
API_Service api_service = Client.getRetrofitInstance().create(API_Service.class);
Call<Response_Success> call = api_service.deleteUserToDo(session_user_id, listId);
call.enqueue(new Callback<Response_Success>() {
@Override
public void onResponse(Call<Response_Success> call, Response<Response_Success> response) {
if (response.code() == 200) {
if (progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
if (response.body().getSuccess().matches("true")) {
Toast.makeText(context, "Silindi!", Toast.LENGTH_SHORT).show();
itemList.remove(itemList.get(clicked));
notifyItemRemoved(clicked);
notifyItemRangeChanged(clicked, itemList.size());
} else {
Toast.makeText(context, "Bilinmeyen bir hata oluştu!", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onFailure(Call<Response_Success> call, Throwable t) {
Toast.makeText(context, "Bilinmeyen bir hata oluştu!", Toast.LENGTH_SHORT).show();
}
});
}
public void addDone(String listId, final int clicked) {
mSharedPref = PreferenceManager.getDefaultSharedPreferences(context);
String session_user_id = mSharedPref.getString("session_user_id", "");
API_Service apiService = Client.getRetrofitInstance().create(API_Service.class);
Call<Response_Success> call = apiService.addDone(session_user_id, listId);
call.enqueue(new Callback<Response_Success>() {
@Override
public void onResponse(Call<Response_Success> call, Response<Response_Success> response) {
if (response.code() == 200) {
if (progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
if (response.body().getSuccess().matches("true")) {
Toast.makeText(context, "Eklendi", Toast.LENGTH_SHORT).show();
itemList.remove(itemList.get(clicked));
notifyItemRemoved(clicked);
notifyItemRangeChanged(clicked, itemList.size());
} else {
Toast.makeText(context, "Bilinmeyen bir hata oluştu!", Toast.LENGTH_SHORT).show();
}
}
}
@Override
public void onFailure(Call<Response_Success> call, Throwable t) {
}
});
}
public void showProgressDialog() {
progressDialog = new ProgressDialog(view.getRootView().getContext());
progressDialog.setMessage("Yükleniyor");
progressDialog.setCancelable(false);
progressDialog.show();
}
}
解决方案
如果我没看错，您有两个选项卡和一个后端数据库，用于存储待办事项及其状态？要更新第二个列表，您只需执行与第一个列表中相同的操作，更新适配器的数据集并通知数据集已更改。如何在第二个选项卡中触发此操作确实是个问题。
您可以使用一个接口并让您的适配器通知您的活动回收器视图 1 对其进行了操作，然后您可以告诉适配器 2 更新其数据。您可以传回数据并只通知一行，也可以通知整个数据集。如果您正在基于所有服务执行此操作，则只需从服务重新加载回收器视图，它将具有新数据。
我认为您需要弄清楚的是如何通知选项卡 2 它需要更新其数据。我的建议是：
public interface AdapterInterface
{
void itemCompleted(Item hereIsTheItemThatNeedsToBeAddedTo2);
}
然后在您的适配器内部有一个带有 getter/setter 的属性，例如：
private AdapterInterface adapterInterfaceListener;
在您的 Fragment/Activity 内部实现 AdapterInterface 并实现 itemCompleted 函数。
然后将您的 adapter.setAdapterInterfaceLisetener 设置为您实现的那个函数。然后在您的适配器内部，当用户单击支票簿将其标记为完成时，您可以调用 adapterInterfaceListener.itemCompleted() 函数，它将该信息发送到您的 Fragment/Activity。从那里您可以将新数据提供给适配器 2，或者调用 API，但是您想要获取新数据。
这有帮助吗？