[英]Update TAB 2 Recyclerview When Data Added in TAB 1's RecyclerView
我有一種to-do app
。 在個人資料活動中,有2個標簽。 To-do
和Done
。 在選項卡1中,用戶可以檢查其“待辦事項”為“完成”。 在這種情況下,我想更新TAB 2
的recyclerview。
我嘗試了幾件事,但沒有成功。 這是TAB 1代碼,與TAB 2幾乎相同。
TAB 1類
公共類Tab_Profile_1擴展了片段{
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適配器
公共類Adapter_Profile_ToDo擴展了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();
}
}
如果我正確閱讀此書,則您有兩個選項卡和一個后端數據庫,用於存儲待辦事項及其狀態? 要更新第二個列表,只需執行與第一個列表相同的操作,並更新適配器的數據集並通知數據集已更改。 問題是您如何在第二個選項卡中觸發此操作。
您既可以使用接口,也可以讓適配器通知您的活動“回收者視圖1”對其進行了操作,然后可以告訴適配器2更新其數據。 您可以傳回數據並僅通知一行,也可以通知整個數據集。 如果您要基於所有服務進行操作,則可以從該服務重新加載回收器視圖,它將具有新數據。
我認為您只需要弄清楚如何通知選項卡2它需要更新其數據。 我的建議是:
public interface AdapterInterface
{
void itemCompleted(Item hereIsTheItemThatNeedsToBeAddedTo2);
}
然后,在適配器內部具有一個帶有getter / setter的屬性,例如:
private AdapterInterface adapterInterfaceListener;
在Fragment / Activity內部,實現AdapterInterface並實現itemCompleted函數。
然后將您的adapter.setAdapterInterfaceLisetener設置為您實現的功能。 然后,當用戶單擊支票簿將其標記為完成時,在適配器內部,可以調用adapterInterfaceListener.itemCompleted()函數,它將把該信息發送到Fragment / Activity。 從那里,您可以將新數據提供給adapter2,或重新調用API,但是要獲取新數據。
這有幫助嗎?
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