在片段中使用recyclerview事件

Question

朋友们早上好，我的问题如下。我有一个带有按钮的cardview，我在recyclerview中捕捉按钮事件，但我想在包含recyclerview的片段中捕捉按钮事件。

@Override
public void onBindViewHolder(@NonNull final MyViewHolder myViewHolder, final int i) {


    myViewHolder.imagen.setImageResource(mData.get(i).getImage());
    myViewHolder.title.setText(mData.get(i).getTitel());



    myViewHolder.button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(context,"ok"+i,Toast.LENGTH_SHORT).show();


        }
    });



}

我需要利用这里的事件。

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

    view = inflater.inflate(R.layout.fragment_form4, container, false);





    list = new ArrayList<>();
    list.add(new POJOcarviewFotoForm4(R.drawable.ic_person_black_24dp,"Picture"));
    list.add(new POJOcarviewFotoForm4(R.drawable.ic_person_black_24dp,"Picture"));
    list.add(new POJOcarviewFotoForm4(R.drawable.ic_person_black_24dp,"Picture"));
    list.add(new POJOcarviewFotoForm4(R.drawable.ic_person_black_24dp,"Picture"));
    list.add(new POJOcarviewFotoForm4(R.drawable.ic_person_black_24dp,"Picture"));


    RecyclerView recyclerView=(RecyclerView)view.findViewById(R.id.form4_recyclerview);
    RecyclerViewAdapterFotoForm4 adapterFotoForm4=new RecyclerViewAdapterFotoForm4(getContext(),list);
    recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
    recyclerView.setAdapter(adapterFotoForm4);




    return view;
}

提前感谢。

Answer 1

您可以使用回调（接口）在适配器和片段之间进行通信。例如，考虑下面的回调（您可以将它作为单独的文件）：

public interface OnClickCallback {
    void onClicked(int position);
}

在您的片段中实现它，这样您将有以下覆盖方法

@Override
public void onClicked(int position){
// you will be retriving the clicked position 
}

在您的片段中创建一个实例OnClickCallback并将其传递给适配器，以便在适配器的setOnClickListener方法中，您可以使用回调与片段通信。

private OnClickCallback onClickCallback;

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

    view = inflater.inflate(R.layout.fragment_form4, container, false);

    onClickCallback = this;



    list = new ArrayList<>();
    list.add(new POJOcarviewFotoForm4(R.drawable.ic_person_black_24dp,"Picture"));
    list.add(new POJOcarviewFotoForm4(R.drawable.ic_person_black_24dp,"Picture"));
    list.add(new POJOcarviewFotoForm4(R.drawable.ic_person_black_24dp,"Picture"));
    list.add(new POJOcarviewFotoForm4(R.drawable.ic_person_black_24dp,"Picture"));
    list.add(new POJOcarviewFotoForm4(R.drawable.ic_person_black_24dp,"Picture"));


    RecyclerView recyclerView=(RecyclerView)view.findViewById(R.id.form4_recyclerview);
    RecyclerViewAdapterFotoForm4 adapterFotoForm4=new RecyclerViewAdapterFotoForm4(getContext(),list);
    recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
    recyclerView.setAdapter(adapterFotoForm4, onClickCallback);

    return view;
}

适配器构造函数中有：

public Adapter(List<String> yourList, OnClickCallback itemClickCallback) {
        this.yourList = yourList;
        this.itemClickCallback = itemClickCallback;
    }

在setOnClickListener中，可以按如下方式调用它：

myViewHolder.button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
           itemClickCallback.onClicked(position);
        }
    });