有人使用RecyclerView找到了一种方法来设置一个onClickListener的项目在RecyclerView? 我想设置一个监听器为每个项目的布局,但这似乎有点太麻烦了 我确信有一种方法让RecyclerView监听onClick事件,但我不能完全弄清楚。
当前回答
有更简单的方法。只需要在根视图上应用onBindViewHolder中的click。
考虑这是你对适配器的看法,
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/linearlayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="1dp"
android:textSize="15sp" />
</LinearLayout>
然后在适配器中执行以下操作
//get the layout and make view holder
@Override
public RVAdapter.ViewHolder1 onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_layout, null);
ViewHolder1 viewHolder = new ViewHolder1(view);
return viewHolder;
}
@Override
public void onBindViewHolder(RVAdapter.ViewHolder1 holder, int position) {
//apply on click on your root view
holder.linearlayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Do on click stuff
}
});
}
//make references to views in layout including root view
public class ViewHolder1 extends RecyclerView.ViewHolder {
protected LinearLayout linearlayout = null
protected TextView textview = null;
public CareerLinksViewHolder(View itemView) {
super(itemView);
this.linearlayout = (LinearLayout) itemView.findViewById(R.id.linearlayout);
this.tvCompName = (TextView) itemView.findViewById(R.id.textview);
}
}
其他回答
这里有一个策略,它给出了一个类似于ListView实现的结果,因为你可以在活动或片段级别而不是适配器或ViewHolder级别定义侦听器。它还定义了一些抽象类,这些抽象类负责适配器和持有者的大量样板工作。
抽象类
首先,定义一个抽象Holder,它扩展了RecyclerView。并定义了一个泛型数据类型T,用于将数据绑定到视图。bindViews方法将由一个子类实现,用于将数据映射到视图。
public abstract class Holder<T> extends RecyclerView.ViewHolder {
T data;
public Holder(View itemView) {
super(itemView);
}
public void bindData(T data){
this.data = data;
bindViews(data);
}
abstract protected void bindViews(T data);
}
同样,创建一个抽象适配器,扩展RecyclerView.Adapter<Holder<T>>。这定义了3个接口方法中的2个,子类将需要实现最后一个onViewHolderCreated方法。
public abstract class Adapter<T> extends RecyclerView.Adapter<Holder<T>> {
List<T> list = new ArrayList<>();
@Override
public void onBindViewHolder(Holder<T> holder, int position) {
holder.bindData(list.get(position));
}
@Override
public int getItemCount() {
return list.size();
}
public T getItem(int adapterPosition){
return list.get(adapterPosition);
}
}
具体类
现在创建一个扩展Holder的新具体类。该方法只需定义视图并处理绑定。这里我使用ButterKnife库,但请随意使用itemView.findViewById(…)方法代替。
public class PersonHolder extends Holder<Person>{
@Bind(R.id.firstname) TextView firstname;
@Bind(R.id.lastname) TextView lastname;
public PersonHolder(View view){
super(view);
ButterKnife.bind(this, view);
}
@Override
protected void bindViews(Person person) {
firstname.setText(person.firstname);
lastname.setText(person.lastname);
}
}
最后,在持有RecyclerView的Activity或Fragment类中,你会有这样的代码:
// Create adapter, this happens in parent Activity or Fragment of RecyclerView
adapter = new Adapter<Person>(){
@Override
public PersonHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(R.layout.layout_person_view, parent, false);
PersonHolder holder = new PersonHolder(v);
v.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
int itemPos = holder.getAdapterPosition();
Person person = getItem(itemPos);
// do something with person
EventBus.getDefault().postSticky(new PersonClickedEvent(itemPos, person));
}
});
return holder;
}
};
对我来说,这是最好的方法:
class YourRecyclerAdapter extends RecyclerView.Adapter<ContactViewHolder> implements View.OnClickListener {
...
@Override
public void onClick(View view) {
int itemPosition = vRecycle.getChildPosition(view);
//And use itemPosition to get the item from your collection. This way you dont restrain the ViewHolder with a OnClick callback
}
...
}
你可以实现View。OnClickListener到你的ViewHolder类
public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public Item item
@InjectView(R.id.tv_title)
public TextView tvTitle;
@InjectView(R.id.rl_row)
public RelativeLayout rlRow;
public ViewHolder(View v) {
super(v);
ButterKnife.inject(this, v);
v.setOnClickListener(this);
}
@Override
public void onClick(View view) {
Log.e("item title",item.getTitle());
}
}
和onBindViewHolder设置你的视图持有人的项目:
public void onBindViewHolder(ViewHolder holder, int position) {
holder.tvTitle.setText(objects.get(position).getTitle());
holder.item = objects.get(position);
}
有更简单的方法。只需要在根视图上应用onBindViewHolder中的click。
考虑这是你对适配器的看法,
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/linearlayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/textview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="1dp"
android:textSize="15sp" />
</LinearLayout>
然后在适配器中执行以下操作
//get the layout and make view holder
@Override
public RVAdapter.ViewHolder1 onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_layout, null);
ViewHolder1 viewHolder = new ViewHolder1(view);
return viewHolder;
}
@Override
public void onBindViewHolder(RVAdapter.ViewHolder1 holder, int position) {
//apply on click on your root view
holder.linearlayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Do on click stuff
}
});
}
//make references to views in layout including root view
public class ViewHolder1 extends RecyclerView.ViewHolder {
protected LinearLayout linearlayout = null
protected TextView textview = null;
public CareerLinksViewHolder(View itemView) {
super(itemView);
this.linearlayout = (LinearLayout) itemView.findViewById(R.id.linearlayout);
this.tvCompName = (TextView) itemView.findViewById(R.id.textview);
}
}
我已经为android开发了一个轻量级的库,你可以访问github并遵循这个示例:
RecycleClick.addTo(YOUR_RECYCLE_VIEW).setOnItemClickListener(new RecycleClick.OnItemClickListener() {
@Override
public void onItemClicked(RecyclerView recyclerView, int position, View v) {
// Your code here
}
});