在 android 的 Nested Recyclerview 中显示数据

Question

当我获取并显示日期（见图）作为主要回收站视图的标题时。我想显示可用的插槽数据而不是 0 1 2 等元素。下面附上代码

json 数据的网址

https://run.mocky.io/v3/c9bd7858-0e41-422f-b1d2-cd490c08583b

AppointmentTimeActivity.java

public class AppointmentTimeActivity extends AppCompatActivity {

SharedPrefManager sharedPrefManager;

Button appointmentTimeButton;
private TextView doctorFullName;
ConstraintLayout constraintLayout;


public static List<List<String>> availableSlots;

RecyclerView rvGroup;
public static ArrayList<String> arrayListGroup;
LinearLayoutManager layoutManagerGroup;
GroupAdapter groupAdapter;

private DoctorScheduleResponse timings;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.select_appointment_time);

    getSupportActionBar().setTitle("Appointment time");
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    sharedPrefManager = new SharedPrefManager(this);

    constraintLayout = findViewById(R.id.constraintLayout);
    appointmentTimeButton = findViewById(R.id.book_video_call_appointment_btn);

    doctorFullName = findViewById(R.id.doctor_full_name);
    rvGroup = findViewById(R.id.rv_group);

    String docName = getIntent().getStringExtra("doctorFullName");

    doctorFullName.setText(docName);

    arrayListGroup = new ArrayList<>();

    fetchAndShowAppointmentsTime();

}

private void fetchAndShowAppointmentsTime() {
    String id = String.valueOf(SpecialityActivity.doctorID);

    Call<DoctorScheduleResponse> call = RetrofitClient.getInstance().getMyInterface().getAppointmentTime("Bearer " + sharedPrefManager.getAccessToken(), id);
    call.enqueue(new Callback<DoctorScheduleResponse>() {
        @Override
        public void onResponse(@NotNull Call<DoctorScheduleResponse> call, @NotNull Response<DoctorScheduleResponse> response) {
            arrayListGroup = new ArrayList<>();

            if (response.isSuccessful()) {
                assert response.body() != null;
                for (List<Slot> slots : response.body().getSlot()) {
                    for (Slot slot : slots) {
                        arrayListGroup.add(slot.getScheduleDate());
                    }
                }
                
                groupAdapter = new GroupAdapter(AppointmentTimeActivity.this, response.body().getSlot());
                layoutManagerGroup = new LinearLayoutManager(getApplicationContext());
                rvGroup.setLayoutManager(layoutManagerGroup);
                rvGroup.setAdapter(groupAdapter);

            }

        }

        @Override
        public void onFailure(@NotNull Call<DoctorScheduleResponse> call, @NotNull Throwable t) {
            Toast.makeText(getBaseContext(), t.getMessage(), Toast.LENGTH_SHORT).show();
        }
    });
}

}

---

DoctorScheduleResponse.java

public class DoctorScheduleResponse {

@SerializedName("slot")
@Expose
private List<List<Slot>> slot = null;

public List<List<Slot>> getSlot() {
    return slot;
}

public void setSlot(List<List<Slot>> slot) {
    this.slot = slot;
}

}

---

GroupAdater.java

public class GroupAdapter extends RecyclerView.Adapter<GroupAdapter.ViewHolder> {

private Activity activity;
ArrayList<String> arrayListGroup, arrayListMember;
LinearLayoutManager linearLayoutManager;
SharedPrefManager sharedPrefManager;
List<List<Slot>> slotsList;

public GroupAdapter(Activity activity, ArrayList<String> arrayListGroup) {
    this.activity = activity;
    this.arrayListGroup = arrayListGroup;
}

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.custom_slot_layout, parent, false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {


    holder.dummyTV.setText(arrayListGroup.get(position));
    arrayListMember = new ArrayList<>();
    sharedPrefManager = new SharedPrefManager(activity);

    for (int i = 0; i < 5; i++) {
        arrayListMember.add(String.valueOf(i));
    }

    CustomAdapter customAdapter = new CustomAdapter(arrayListMember);
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(activity);
    holder.rvMember.setLayoutManager(linearLayoutManager);
    holder.rvMember.setAdapter(customAdapter);

}


@Override
public int getItemCount() {
    return arrayListGroup.size();
}

public class ViewHolder extends RecyclerView.ViewHolder {

    TextView dummyTV;
    RecyclerView rvMember;


    public ViewHolder(@NonNull View itemView) {
        super(itemView);

        dummyTV = itemView.findViewById(R.id.dummyTextView);
        rvMember = itemView.findViewById(R.id.rv_member);

    }
}

}

---

CustomAdapter.java

public class CustomAdapter extends RecyclerView.Adapter<CustomAdapter.SlotsViewHolder> {

ArrayList<String> slots;


public CustomAdapter(ArrayList<String> slots) {
    this.slots = slots;
}

@NonNull
@Override
public SlotsViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.available_slots_list, parent, false);
    return new CustomAdapter.SlotsViewHolder(view);
}

@Override
public void onBindViewHolder(@NonNull SlotsViewHolder holder, int position) {
    holder.tvSlots.setText(slots.get(position));
}

@Override
public int getItemCount() {
    return slots.size();
}

public class SlotsViewHolder extends RecyclerView.ViewHolder {
    TextView tvSlots;

    public SlotsViewHolder(@NonNull View itemView) {
        super(itemView);

        tvSlots = itemView.findViewById(R.id.tv_slots);

    }
}

}

Answer 1

嵌套的回收器视图在内存方面会更加复杂。因此，您可以使用不同的方法实现相同的 UI。

您应该尝试使用具有动态布局绑定的单个回收器视图。 示例：对于单项回收站视图，将有一个标题（用于日期）和一个视图组（可能是线性布局）然后绑定任何编号。该线性布局内的子视图。

Answer 2

问题出在 GroupAdater.java 中。在 onBindViewHolder 方法中，您将循环变量的值添加到您传递给嵌套回收器视图适配器的列表中。

for (int i = 0; i < 5; i++) {
    arrayListMember.add(String.valueOf(i));
}

您必须从 arrayListGroup 对象中添加正确的日期。