Question

我有2种类型的用户。第一个用户可以在回收者视图中查看所有数据。第二个用户只能在“回收者”视图中查看特定数据。

现在我只能显示特定数据，第二个用户单击后，它将显示第一个数据，而不是位置。

如何在正确的显示上修复用户单击并在正确的数据处继续操作？

MainActivity.java。准备根据条件显示回收者视图。

private void prepareMainMenu(final String type) {
        MainItem mainItem;
        switch (type) {
            case "Customer":
                mainItem = new MainItem("Customer", imageViewMain[1]);
                mainItemList.add(mainItem);
                break;
            case "Packages":
                mainItem = new MainItem("Packages", imageViewMain[2]);
                mainItemList.add(mainItem);
                break;
            case "Live Chat":
                mainItem = new MainItem("Live Chat", imageViewMain[3]);
                mainItemList.add(mainItem);

                break;
            case "Transaction":
                mainItem = new MainItem("Transaction", imageViewMain[5]);
                mainItemList.add(mainItem);

                break;
            case "Profit Report":
                mainItem = new MainItem("Profit Report", imageViewMain[4]);
                mainItemList.add(mainItem);

                break;
            case "Owner":
                mainItem = new MainItem("Admin", imageViewMain[0]);
                mainItemList.add(mainItem);

                mainItem = new MainItem("Customer", imageViewMain[1]);
                mainItemList.add(mainItem);

                mainItem = new MainItem("Packages", imageViewMain[2]);
                mainItemList.add(mainItem);

                mainItem = new MainItem("Live Chat", imageViewMain[3]);
                mainItemList.add(mainItem);

                mainItem = new MainItem("Profit Report", imageViewMain[4]);
                mainItemList.add(mainItem);

                mainItem = new MainItem("Transaction", imageViewMain[5]);
                mainItemList.add(mainItem);
                break;

        }
        //Display
        mainViewAdapter.notifyDataSetChanged();
    }

MainViewAdapter.java（用户将在其中单击）

 @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, final int position) {
        MainItem mainItem = mainItemList.get(position);
        holder.getTextViewTitle().setText(mainItem.getNameMain());

        Glide.with(context)
                .load(mainItem.getImageMain())
                .into(holder.imageViewMain);

        holder.getView().setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //Check the position
                switch (position) {
                    case 0:
                        context.startActivity(new Intent(context, AdminActivity.class));
                        break;
                    case 1:
                        context.startActivity(new Intent(context, CustomerActivity.class));
                        break;
                    case 2:
                        context.startActivity(new Intent(context, PackagesSelectorActivity.class));
                        break;
                    case 3:
                        context.startActivity(new Intent(context, LiveChatActivity.class));
                        break;
                    case 4:
                        context.startActivity(new Intent(context, ProfitReportActivity.class));
                        break;
                    case 5:
                        context.startActivity(new Intent(context, TransactionActivity.class));
                        break;
                }

            }
        });
    }

已更新：这是prepareMainMenu方法的去处。

 private void retrieveData() {
        if (firebaseUser != null) {
            databaseReference.child("admin").child(firebaseUser.getUid()).addListenerForSingleValueEvent(new ValueEventListener() {
                @Override
                public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                    if (dataSnapshot.exists()) {
                        Admin admin = dataSnapshot.getValue(Admin.class);
                        if (admin != null) {
                            fullName = admin.getFullName();
                            email = admin.getEmail();
                            type = admin.getType();

                            //Then display
                            textViewFullName.setText(fullName);
                            textViewEmail.setText(email);
                            textViewType.setText(type);
                            //Check the type of admin
                            switch (type) {
                                case "Customer":
                                    prepareMainMenu("Customer");
                                    break;
                                case "Packages":
                                    prepareMainMenu("Packages");
                                    break;
                                case "Live Chat":
                                    prepareMainMenu("Live Chat");
                                    break;
                                case "Transaction":
                                    prepareMainMenu("Transaction");
                                    break;
                                case "Profit Report":
                                    prepareMainMenu("Profit Report");
                                    break;
                                case "Owner":
                                    prepareMainMenu("Owner");
                                    break;
                            }
                        }
                    }
                }

                @Override
                public void onCancelled(@NonNull DatabaseError databaseError) {

                }
            });
        }
    }

Answer 1

使用mainItem名称来区分点击事件，而不是使用onBindViewHolder内的位置。

holder.getView().setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
    switch (mainItem.getNameMain().toLowerCase()) {
        case "admin":
            context.startActivity(new Intent(context, AdminActivity.class));
            break;
        case "customer":
            context.startActivity(new Intent(context, CustomerActivity.class));
            break;
        case "packages":
            context.startActivity(new Intent(context, PackagesSelectorActivity.class));
            break;
        case "live chat":
            context.startActivity(new Intent(context, LiveChatActivity.class));
            break;
        case "profit report":
            context.startActivity(new Intent(context, ProfitReportActivity.class));
            break;
        case "transaction":
            context.startActivity(new Intent(context, TransactionActivity.class));
            break;
    }

}
});

此外，我使用了小写的字符串比较，这将降低字符串匹配的风险。

Answer 2

如果从任何用户角色的角度查看此回收器，您将发现根据当前登录角色对数据进行了过滤。因此，您可以轻松地将用户角色添加到MainItem类中，作为从此类创建的任何对象的属性。并且在prepareMainMenu函数中，您可以根据当前登录角色轻松地过滤数据

首先，您可以为不同的角色定义一个枚举

public enum Roles {
    CustomerRole, AdminRole
}

然后将此角色作为属性传递给MainItem类，例如

MainItem("Customer", imageViewMain[1],Roles.Customer);

并且onBindView方法将像这样

  @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, final int position) {
        MainItem mainItem = mainItemList.get(position);
        holder.getTextViewTitle().setText(mainItem.getNameMain());

        Glide.with(context)
                .load(mainItem.getImageMain())
                .into(holder.imageViewMain);

        holder.getView().setOnClickListener(new  View.OnClickListener(){
            @Override
            public void onClick(View view) {

              switch (mainItem.role) {
                 case Roles.CustomerRole: 
                      context.startActivity(new Intent(context, CustomerActivity.class));
                      break;

                 case Roles.Admin: 
                      context.startActivity(new Intent(context, AdminActivity.class));
                      break;
            }
        });
    }

另一个看起来更好的解决方案是像这样将类名传递给dto

class MainItem {
    String title;
    String image;
    Class className;

    public MainItem(String title, String image, Class className) {
        this.title = title;
        this.image = image;
        this.className = className;
    }

    public String getTitle() {
        return title;
    }

    public String getImage() {
        return image;
    }

    public Class getClassName() {
        return className;
    }
}

，您的数据创建将是

MainItem("Customer", imageViewMain[1],CustomerActivity.class);

和您的onBindView方法将如下所示

        @Override
        public void onBindViewHolder(@NonNull MyViewHolder holder, final int position) {
            MainItem mainItem = mainItemList.get(position);
            holder.getTextViewTitle().setText(mainItem.getNameMain());

            Glide.with(context)
                    .load(mainItem.getImageMain())
                    .into(holder.imageViewMain);

            holder.getView().setOnClickListener(new  View.OnClickListener(){
                @Override
                public void onClick(View view) {
                   context.startActivity(new Intent(context, mainItem.getClassName));

            });
        }

Recycerview显示特定数据

2 个答案: