[英]RecyclerView onclick doesnt work
我试图使我单击并在RecyclerView上添加项目,它将打开包含所单击项目详细信息的新活动。
我的adapter.java代码是:
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();
}
class MyHolder extends RecyclerView.ViewHolder{
TextView textFirstName;
TextView textPassword;
TextView textLastName;
TextView textEmail;
// create constructor to get widget reference
public MyHolder(View itemView) {
super(itemView);
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);
}
}
}
例如,我想将“ curremt.fname .......”解析为另一个活动,以向用户显示所单击项目的完整详细信息。
RecyclerViews开箱即用地提供了onclick功能。 您需要自己提供onClick功能。 长按也是如此。
理想情况下,您将使ViewHolder实现View.OnClickListener接口,并在ViewHolder的构造函数内部将其注册为itemView的单击侦听器。 每当调用onClick方法时,您都可以通过调用getAdapterPostion()获取该ViewHolder实例的位置。 这将返回一个int,该int指示View相对于Adapters数据集的位置。 从这里可以调用regisster自定义回调。 我在应用程序中所做的就是创建一个自定义onItemClick界面,该界面具有触发方法并接收int的位置和被单击的视图。 我已经修改了您的代码,以举例说明您可以做什么。
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());
}
}
}
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
谢谢你们的帮助!
无论如何,我刚刚添加了:
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持有人,int位置)方法,它起作用了。
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