在Android中,你可以使用RecyclerView和Retrofit库来加载多个列表。下面是一个示例解决方案,其中使用了MVP架构:
implementation 'com.android.support:recyclerview-v7:28.0.0'
implementation 'com.squareup.retrofit2:retrofit:2.9.0'
implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
public class ItemList {
private List- items;
public List
- getItems() {
return items;
}
}
public interface ApiService {
@GET("items")
Call getItems();
}
public class ItemListPresenter {
private ApiService apiService;
private ItemListView view;
public ItemListPresenter(ApiService apiService, ItemListView view) {
this.apiService = apiService;
this.view = view;
}
public void loadItems() {
apiService.getItems().enqueue(new Callback() {
@Override
public void onResponse(Call call, Response response) {
if (response.isSuccessful()) {
ItemList itemList = response.body();
view.showItems(itemList.getItems());
} else {
view.showError();
}
}
@Override
public void onFailure(Call call, Throwable t) {
view.showError();
}
});
}
}
public interface ItemListView {
void showItems(List- items);
void showError();
}
public class ItemListActivity extends AppCompatActivity implements ItemListView {
private RecyclerView recyclerView;
private ItemListAdapter adapter;
private ItemListPresenter presenter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_item_list);
recyclerView = findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
adapter = new ItemListAdapter();
recyclerView.setAdapter(adapter);
ApiService apiService = RetrofitClient.getClient().create(ApiService.class);
presenter = new ItemListPresenter(apiService, this);
presenter.loadItems();
}
@Override
public void showItems(List- items) {
adapter.setItems(items);
adapter.notifyDataSetChanged();
}
@Override
public void showError() {
Toast.makeText(this, "Error loading items", Toast.LENGTH_SHORT).show();
}
}
public class ItemListAdapter extends RecyclerView.Adapter {
private List- items = new ArrayList<>();
public void setItems(List
- items) {
this.items = items;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list_item, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
Item item = items.get(position);
holder.textView.setText(item.getName());
}
@Override
public int getItemCount() {
return items.size();
}
public static class ViewHolder extends RecyclerView.ViewHolder {
public TextView textView;
public ViewHolder(View itemView) {
super(itemView);
textView = itemView.findViewById(R.id.textView);
}
}
}
这就是一个使用RecyclerView和