RecyclerView onclick无效

Question

我试图在我点击RecyclerView上的项目时进行此操作，它将打开包含所点击项目详细信息的新活动。

我的adapter.java代码是：

<?php
$xml = simplexml_load_string('<xmldata>
    <data>
        <value>123456</value>
    </data>
</xmldata>');
$value = $xml->data->value;
var_dump($value, 2*$value, number_format($value), number_format(2*$value));

例如，我想将“curremt.fname .......”解析为另一个活动，以向用户显示所点击的项目的完整详细信息。

Answer 1

RecyclerViews提供了一个onclick功能。您需要自己提供onClick功能。长期紧迫也是如此。

理想情况下，您的ViewHolder会实现View.OnClickListener接口，并且在ViewHolder的构造函数内部，您将其注册为itemView的单击侦听器。每当调用onClick方法时，您都可以通过调用getAdapterPostion（）来获取该ViewHolder实例的位置。这将返回一个int，指示View相对于Adapters数据集的位置。从这里你可以打电话给regisster自定义回调。我在我的应用程序中所做的是使用一个被触发的方法创建一个自定义的onItemClick接口，并接收int的位置和被单击的视图。我修改了你的代码，给你一个你可以做的例子。

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

private Context context;
private LayoutInflater inflater;
List<UsersData> data= Collections.emptyList();
UsersData current;
int currentPos=0;

// create constructor to innitilize context and data sent from MainActivity
public AdapterUsersData(Context context, List<UsersData> data){
    this.context=context;
    inflater= LayoutInflater.from(context);
    this.data=data;
}

// Inflate the layout when viewholder created
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view=inflater.inflate(R.layout.container_users, parent,false);
    MyHolder holder=new MyHolder(view);
    return holder;
}

// Bind data
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {

    // Get current position of item in recyclerview to bind data and assign values from list
    final MyHolder myHolder= (MyHolder) holder;
    final UsersData current=data.get(position);
    myHolder.textFirstName.setText("First Name: " + current.fname);
    myHolder.textPassword.setText("Pass: " + current.password);
    myHolder.textLastName.setText("Last Name: " + current.lname);
    myHolder.textEmail.setText("Email. " + current.email);


}

// return total item from List
@Override
public int getItemCount() {
    return data.size();
}

public interface OnItemClickListener {
    void onItemClicked(View v, int position);
}

private OnItemClickListener listener;


class MyHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    TextView textFirstName;
    TextView textPassword;
    TextView textLastName;
    TextView textEmail;

    // create constructor to get widget reference
    public MyHolder(View itemView) {
        super(itemView);
        itemView.setOnClickListener(this);
        textFirstName= (TextView) itemView.findViewById(R.id.textFirstName);
        textPassword = (TextView) itemView.findViewById(R.id.textPassword);
        textLastName = (TextView) itemView.findViewById(R.id.textLastName);
        textEmail = (TextView) itemView.findViewById(R.id.textEmail);
    }

    public void onClick(View v) {
        if(listener != null) {
            listener.onItemClicked(v, getAdapterPosition());
        }
    }

}

Answer 2

你可以试试..

class dapterUsersData extends RecyclerView.Adapter<dapterUsersData.ViewHolder> {

    private Context context;
    private LayoutInflater inflater;
    List<UsersData> data =  Collections.emptyList();
    ArrayList<UsersData> dataSet;

    public dapterUsersData(ArrayList<UsersData> data) {
        this.data = data;
    }


    @Override
    public dapterUsersData.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {

        View itemLayoutView = LayoutInflater.from(viewGroup.getContext()).inflate(
                R.layout.container_users, null);
        itemLayoutView.setLayoutParams(new RecyclerView.LayoutParams(RecyclerView.LayoutParams.MATCH_PARENT, RecyclerView.LayoutParams.WRAP_CONTENT));


        dapterUsersData.ViewHolder viewHolder = new dapterUsersData.ViewHolder(itemLayoutView);

        return viewHolder;
    }

    @Override
    public void onBindViewHolder(dapterUsersData.ViewHolder viewHolder, int i) {

        UsersData current = data.get(i);

        viewHolder.textFirstName.setText("First Name: " + current.getFname());
        viewHolder.textPassword.setText("Pass: " + current.getPassword());
        viewHolder.textLastName.setText("Last Name: " + current.getLname());
        viewHolder.textEmail.setText("Email. " + current.getEmail());

        viewHolder.menu = current;
    }

    @Override
    public int getItemCount() {

        return dataSet.size();
    }

    public void updateList(List<UsersData> temp) {
        dataSet = (ArrayList<UsersData>) temp;
        notifyDataSetChanged();
    }

    // inner class to hold a reference to each item of RecyclerView
    public  class ViewHolder extends RecyclerView.ViewHolder {

        TextView textFirstName;
        TextView textPassword;
        TextView textLastName;
        TextView textEmail;




        public UsersData menu;

        public ViewHolder(View itemLayoutView) {
            super(itemLayoutView);

            textFirstName= (TextView) itemLayoutView.findViewById(R.id.textFirstName);
            textPassword = (TextView) itemLayoutView.findViewById(R.id.textPassword);
            textLastName = (TextView) itemLayoutView.findViewById(R.id.textLastName);
            textEmail = (TextView) itemLayoutView.findViewById(R.id.textEmail);


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

                    //  OnClick
                    String firstName = textFirstName.getText().toString();

                }
            });

        }

    }
}
//end Adapter

Answer 3

谢谢你们的帮助！

无论如何我刚刚补充道：

 myHolder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(context,current.fname.toString(),Toast.LENGTH_LONG).show();
        }
    });

到：public void onBindViewHolder（RecyclerView.ViewHolder holder，int position）方法，它起作用了。