java - 如何处理 fragment 上的recyclerview click事件？

我知道此问题已在社区中提出，但仍然无法解决我的问题。这就是为什么再次发布此信息。如何将数据从recyclerview适配器传递到片段。我已成功将数据从适配器传递到活动。但是无法获取如何将数据从适配器传递到片段。我的数据库中有两个参数（1）mSliderImage和（2）mTitle。 mSliderImage显示在主片段上。但是现在我想要当用户单击滑块的特定图像时，打开一个新片段，并显示mTitle。我可以基于图像位置单击图像滑块来成功打开新片段。但没有获得如何在该片段中传递mTitle的信息。请有人帮我整个代码，因为我必须在1月17日之前提交此大学级别的项目。我只发布重要代码，而不是整个代码。我只想编码如何将mSliderTitle从适配器传递到片段的编码解决方案。当我单击图像滑块的某些图像时。

下面是我的代码：

在模型中，我已经通过了上面已经提到的2个Getters和Setters。 （1）mSliderImage和（2）mTitle。

滑块适配器：

public class SliderImageAdapter extends SliderViewAdapter<SliderImageAdapter.SliderAdapterVH>{

    public List<Banner> bannerList;
    public Context context;
    private OnItemClicked onClick;

    public interface OnItemClicked {
        void onItemClick(int position);
    }

    public SliderImageAdapter(Context context, List<Banner> bannerList, OnItemClicked onClick) {

        this.bannerList = bannerList;
        this.context = context;
        this.onClick = onClick;
    }

    @Override
    public SliderAdapterVH onCreateViewHolder(ViewGroup parent) {
        View inflate = LayoutInflater.from(parent.getContext()).inflate(R.layout.image_slider_myshop, parent, false);
        return new SliderAdapterVH(inflate);
    }

    @Override
    public void onBindViewHolder(final SliderAdapterVH viewHolder, final int position) {

Glide.with(viewHolder.itemView)
                .load(bannerList.get(position).getmSliderImage())
                .into(viewHolder.imageViewBackground);


        viewHolder.itemView.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                onClick.onItemClick(position);
            }
        });
    }

    @Override
    public int getCount() {
        return bannerList.size();
    }

    public int getItemPosition (Object object) {
        return POSITION_NONE;
    }

    public void setOnClick(OnItemClicked onClick) {
        this.onClick = onClick;
    }



    class SliderAdapterVH extends SliderViewAdapter.ViewHolder {
View itemView;
    ImageView imageViewBackground;

    public SliderAdapterVH(View itemView) {
        super(itemView);
        imageViewBackground = itemView.findViewById(R.id.iv_auto_image_slider);
        this.itemView = itemView;

        }
    }

主页片段：（此处显示了图像滑块。我想当用户单击一个新片段时打开并显示mTitle）。

public class HomeFragment extends Fragment implements SliderImageAdapter.OnItemClicked {

private SliderImageAdapter sliderImageAdapter;
    private List<Banner> bannerList;

bannerList = new ArrayList<>();
        sliderImageAdapter = new SliderImageAdapter(getActivity(), bannerList, this);

@Override
    public void onItemClick(int position) {

        FragmentManager fm = getFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();
        ft.add(R.id.fragment_container_dashboard, SliderClickFragment.newInstance());
        ft.addToBackStack(null);
        ft.commit();
    }

滑块单击片段XML：

<androidx.coordinatorlayout.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

<TextView
 android:id="@+id/mSliderTitle"
 android:layout_width="match_parent"
 android:layout_height="match_parent"/>

</androidx.coordinatorlayout.widget.CoordinatorLayout>

滑块单击片段Java ：（在此，我想在用户单击图像时显示mTitle）

public class SliderClickFragment extends Fragment {

    public static SliderClickFragment newInstance() {
        Bundle args = new Bundle();
        SliderClickFragment fragment = new SliderClickFragment();
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.slider_click_listner,container,false);

        return view;
    }
}

最佳答案

试试这个。我还没有测试过，但是这种流程应该可以达到您想要实现的目标。

HomeFragment.java

public class HomeFragment extends Fragment implements SliderImageAdapter.OnItemClicked {

private SliderImageAdapter sliderImageAdapter;
    private List<Banner> bannerList;

bannerList = new ArrayList<>();
        sliderImageAdapter = new SliderImageAdapter(getActivity(), bannerList, this);

@Override
    public void onItemClick(int position) {

    //GET THE TITLE STRING HERE
    String title = bannerList.get(position).getmSliderTitle();

    FragmentManager fm = getFragmentManager();
    FragmentTransaction ft = fm.beginTransaction();

    //PASS THIS TITLE TO THE FRAGMENT INSTANCE LIKE THIS
    ft.add(R.id.fragment_container_dashboard, SliderClickFragment.newInstance(title));

    ft.addToBackStack(null);
    ft.commit();
}

SliderClickFragment.java

public class SliderClickFragment extends Fragment {

//EDIT the newInstance Method definition to include title like this:
public static SliderClickFragment newInstance(String title) {
    Bundle args = new Bundle();

    //PASS THE STRING IN THE BUNDLE WHICH WILL THEN BE FETCHED IN ONCREATEVIEW LATER LIKE THIS
    args.putString("title", title);

    SliderClickFragment fragment = new SliderClickFragment();
    fragment.setArguments(args);
    return fragment;
}

@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view=inflater.inflate(R.layout.slider_click_listner,container,false);

    //GET THE STRING HERE AND THEN USE IT HOWEVER YOU LIKE
    String title = getArguments().getString("title");

    return view;
}

}