Question

我在一个片段中有Recyclerview类别和Recyclerview产品（抽屉活动）。当我单击类别中的某项时，我想重新加载/刷新recyclerview产品。

Recyclerview类别

...
     @Override
    public transaksibaru_kategori_viewholder onCreateViewHolder(final ViewGroup parent, int viewType) {
        View view;
        view = LayoutInflater.from(parent.getContext()).inflate(R.layout.rv_item_transaksibaru_kategori, parent, false);
        final transaksibaru_kategori_viewholder vHolder = new transaksibaru_kategori_viewholder(view);
        sharedPrefManager = new SharedPrefManager(parent.getContext());
        Activity_transaksibaru.KEY_ACT = "run";
        vHolder.linearlayout_kategori.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String id_kategori = mItem_kategori.get(vHolder.getAdapterPosition()).getId();
                sharedPrefManager.savetransaksibarustring(SharedPrefManager.sp_idkategori,id_kategori);
                Toast.makeText(parent.getContext(), "ID KATEGORI = " + id_kategori,Toast.LENGTH_LONG).show();

            }
        });
        return vHolder;
    }
...

片段

@Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
...

        statusview = sharedPrefManager.getSp_viewmode();
        statushitung = Integer.valueOf(statusview);
        id_kategori = sharedPrefManager.getSp_idkategori();
        //id_kategori = "10";
        if (statushitung%2 == 0){
            call_itembarang_gridview();
            i=1;
        }else {
            call_itembarang();
            i=2;
        }
...

我只需要从RV_category（RV2）运行call_itembarang（），它必须很简单，但我不知道该怎么做

Answer 1

解决您问题的简单方法是：

将两个适配器（productsAdapter和categoryAdapter）保持在 SharedPrefManager。

将loadCategory（int categoryId）方法添加到SharedPrefManager。

public void loadCategory(int categoryId) {
    // you need to create getProductsOfCategory method in SharedPrefManager.
    List<Product> products = getProductsOfCategory(categoryId);
    // you need to create setProductList method in productsAdapter
    productsAdapter.setProductList(products);
    productsAdapter.notifyDatasetChanged();
}

在类别的RecyclerView中，在onCreateViewHolder方法中更改onClickListener，以便它使用loadCategory方法。

Answer 2

因此，在这种情况下，适配器必须与片段进行通信。

我们将为此使用接口：

1）在新文件中创建界面

public interface onCategoryClickedListener{

void onCategoryClicked(String categoryId);

}

2）适配器

public class YourAdapter extends ......{

private onCategoryClickedListener listener;


//method to set listener
public void setOnCategoryClickedListener(onCategoryClickedListener listener){
this.listener=listener;
}

//oncreateviewholder

@Override
public transaksibaru_kategori_viewholder onCreateViewHolder(final ViewGroup parent, int viewType) {

......

vHolder.linearlayout_kategori.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

//your category id
final String id_kategori = mItem_kategori.get(vHolder.getAdapterPosition()).getId();

//send the category id back to your fragment
listner.onCategoryClicked(id_kategori);

            }
        });


}

3）现在让您的片段实现此接口

public class YourFragment extends Fragment implements onCategoryClickedListener{

private RecyclerView mRecyclerView;
private YourAdapter adapter;
.....
.....
.....

@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

.......

//here you pass the listener to your adapter

adapter.setOnCategoryClickedListener(this);

........
return(view);
}

@Override
public void onCategoryClicked(String categoryId){

//this will be called every time an item in your category is clicked

//call the method from here and whatever if statements you want

}

}

如何从同一片段中的其他recyclerview适配器刷新recyclerview适配器

2 个答案: