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
如果你想在个别项目上捕捉点击事件,那么只需在ViewHolder类中实现OnClickListener,然后在个别视图或整个itemView上设置点击侦听器。
下面的例子说明了同样的情况
public class ContactViewHolder extends RecyclerView.ViewHolder implements OnClickListener
{
TextView txt_title,txt_name,txt_email;
public ContactViewHolder(View itemView)
{
super(itemView);
txt_title = (TextView)itemView.findViewById(R.id.txt_title);
txt_name = (TextView)itemView.findViewById(R.id.txt_name);
txt_email = (TextView)itemView.findViewById(R.id.txt_email);
txt_name.setOnClickListener(this);
txt_email.setOnClickListener(this);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v == itemView)
{
Toast.makeText(RecyclerDemoActivity.this, "Visiting Card Clicked is ==>"+txt_name.getText(), Toast.LENGTH_SHORT).show();
}
if(v == txt_name)
{
Toast.makeText(RecyclerDemoActivity.this, "Name ==>"+txt_name.getText(), Toast.LENGTH_SHORT).show();
}
if(v == txt_email)
{
Toast.makeText(RecyclerDemoActivity.this, "Email ==>"+txt_email.getText(), Toast.LENGTH_SHORT).show();
}
}
}
}
其他回答
我有一个很好的解决方案RecyclerView的onItemClickListener的项目和子项
步骤1—创建接口
public interface OnRecyclerViewItemClickListener
{
/**
* Called when any item with in recyclerview or any item with in item
* clicked
*
* @param position
* The position of the item
* @param id
* The id of the view which is clicked with in the item or
* -1 if the item itself clicked
*/
public void onRecyclerViewItemClicked(int position, int id);
}
步骤2-然后在适配器的onBindViewHolder方法中使用它,如下所示
/**
* Custom created method for Setting the item click listener for the items and items with in items
* @param listener OnRecyclerViewItemClickListener
*/
public void setOnItemClickListener(OnRecyclerViewItemClickListener listener)
{
this.listener = listener;
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, final int position)
{
// viewHolder.albumBg.setBackgroundResource(_itemData[position]
// .getImageUrl());
viewHolder.albumName.setText(arrayList.get(position).getName());
viewHolder.artistName.setText(arrayList.get(position).getArtistName());
String imgUrl = arrayList.get(position).getThumbImageUrl();
makeImageRequest(imgUrl, viewHolder);
viewHolder.parentView.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
listener.onRecyclerViewItemClicked(position, -1);
}
});
viewHolder.settingButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
listener.onRecyclerViewItemClicked(position, v.getId());
}
});
}
// class to hold a reference to each item of RecyclerView
public static class ViewHolder extends RecyclerView.ViewHolder
{
public TextView albumName, artistName;
public ImageView albumIcon, settingButton;
public LinearLayout parentView;
public ViewHolder(View itemLayoutView)
{
super(itemLayoutView);
// albumBg = (LinearLayout) itemLayoutView
// .findViewById(R.id.albumDlbg);
albumName = (TextView) itemLayoutView.findViewById(R.id.albumName);
artistName = (TextView) itemLayoutView
.findViewById(R.id.artistName);
albumIcon = (ImageView) itemLayoutView.findViewById(R.id.albumIcon);
parentView = (LinearLayout) itemLayoutView
.findViewById(R.id.albumDlbg);
settingButton = (ImageView) itemLayoutView
.findViewById(R.id.settingBtn);
}
}
步骤3-在活动或片段中找到并设置回收器视图,您正在使用此
recyclerView = (RecyclerView) rootview.findViewById(R.id.vmtopsongs);
lm = new LinearLayoutManager(mActivity);
lm.setOrientation(LinearLayoutManager.VERTICAL);
recyclerView.setLayoutManager(lm);
recyclerView.addItemDecoration(
new HorizontalDividerItemDecoration.Builder(getActivity())
.paint(Utils.getPaint()).build());
PopularSongsadapter mAdapter = new PopularSongsadapter(gallery,
mActivity, true);
// set adapter
recyclerView.setAdapter(mAdapter);
mAdapter.setOnItemClickListener(this);
// set item animator to DefaultAnimator
recyclerView.setItemAnimator(new DefaultItemAnimator());
步骤4-最后在使用recyclerview的activity或fragment中实现接口
@Override
public void onRecyclerViewItemClicked(int position, int id)
{
if(id==-1){
Toast.makeText(mActivity, "complete item clicked", Toast.LENGTH_LONG).show();
}else{
Toast.makeText(mActivity, "setting button clicked", Toast.LENGTH_LONG).show();
}
}
更新Kotlin语言 我已经更新了kotlin的代码,其中只有整个视图有点击监听器。你可以根据上面的java代码编辑界面和代码来设置子项点击监听器。
适配器
class RecentPostsAdapter(private val list: MutableList<Post>) :
RecyclerView.Adapter<RecentPostsAdapter.ViewHolder>() {
private lateinit var onItemClickListener: OnItemClickListener
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
return ViewHolder(
LayoutInflater.from(parent.context)
.inflate(R.layout.listitem_recent_post, parent, false)
)
}
override fun getItemCount(): Int {
return list.size
}
fun setOnItemClickListener(onItemClickListener: OnItemClickListener) {
this.onItemClickListener = onItemClickListener
}
private fun getItem(position: Int): Post {
return list[position]
}
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.bind(getItem(position))
holder.itemView.setOnClickListener(View.OnClickListener {
onItemClickListener.onItemClick(
position
)
})
}
class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
private var imageView: NetworkImageView? = null
private var tvTitle: TextView? = null
private var tvExcerpt: TextView? = null
private var htmlSpanner: HtmlSpanner = HtmlSpanner()
init {
imageView = itemView.findViewById(R.id.niv_post_image)
tvTitle = itemView.findViewById(R.id.tv_post_title)
tvExcerpt = itemView.findViewById(R.id.tv_post_excerpt)
}
fun bind(post: Post) {
tvTitle?.text = post.title
tvExcerpt?.text = htmlSpanner.fromHtml(post.excerpt)
}
}
interface OnItemClickListener {
fun onItemClick(position: Int)
}
}
活动或片段
recyclerView = view.findViewById(R.id.rvHomeRecentPosts)
recyclerView.layoutManager = LinearLayoutManager(view.context)
list = mutableListOf()
recentPostsAdapter = RecentPostsAdapter(list)
recyclerView.adapter = recentPostsAdapter
recentPostsAdapter.setOnItemClickListener(object:RecentPostsAdapter.OnItemClickListener{
override fun onItemClick(position: Int) {
(activity as MainActivity).findNavController(R.id.nav_host_fragment).navigate(R.id.action_nav_home_to_nav_post_detail)
}
})
这就是我最后需要的东西,以防有人发现它有用:
public static class ViewHolder extends RecyclerView.ViewHolder {
public ViewHolder(View item) {
super(item);
item.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Log.d("RecyclerView", "onClick:" + getAdapterPosition());
}
});
}
}
来源:http://blog.csdn.net/jwzhangjie/article/details/36868515
下面是我的代码片段:
v.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
int newPosition = MainActivity.mRecyclerView.getChildAdapterPosition(v);
Intent cardViewIntent = new Intent(c, MainActivityCards.class);
cardViewIntent.putExtra("Position", newPosition);
c.startActivity(cardViewIntent);
}
});
v是onCreateViewHolder的视图 c为背景信息
对于kotlin句柄,根据Jacobs的回答单击RecyclerView答案
创建类RecyclerItemClickListener:
class RecyclerItemClickListener(context: Context, recyclerView: RecyclerView, listner: OnItemClickListener) : RecyclerView.OnItemTouchListener {
var mGestureDetector: GestureDetector
var mListner: OnItemClickListener
interface OnItemClickListener {
fun onItemClick(view: View, position: Int)
fun onLongItemClick(view: View, position: Int)
}
init {
this.mListner = listner
mGestureDetector = GestureDetector(context, object : GestureDetector.SimpleOnGestureListener() {
override fun onSingleTapUp(e: MotionEvent?): Boolean = true
override fun onLongPress(e: MotionEvent?) {
val child: View? = recyclerView.findChildViewUnder(e!!.getX(), e.getY())
if (child != null && mListner != null) {
mListner.onLongItemClick(child, recyclerView.getChildAdapterPosition(child))
}
}
})
}
override fun onTouchEvent(rv: RecyclerView, e: MotionEvent) = Unit
override fun onInterceptTouchEvent(view: RecyclerView, e: MotionEvent): Boolean {
val childView: View? = view.findChildViewUnder(e!!.getX(), e.getY())
if (childView != null && mListner != null && mGestureDetector.onTouchEvent(e)) {
mListner.onItemClick(childView, view.getChildAdapterPosition(childView))
return true
}
return false
}
override fun onRequestDisallowInterceptTouchEvent(disallowIntercept: Boolean) = Unit
}
点击Any RecyclerView(在活动/片段内):
recyclerView.addOnItemTouchListener(
RecyclerItemClickListener(this, recyclerView, object : RecyclerItemClickListener.OnItemClickListener {
override fun onItemClick(view: View, position: Int) {
// TODO catch click
}
override fun onLongItemClick(view: View, position: Int) {
// TODO catch click
}
})
)
不幸的是,RecyclerView缺少ListView内置的几个功能。 例如,添加OnItemClickListener的能力,当一个项目被单击时触发。 RecyclerView允许你在适配器中设置一个OnClickListener,但是传递那个点击 从你的调用代码,到适配器,再到ViewHolder,监听器是复杂的 要捕捉一个简单的项目单击。
public class ItemClickSupport {
private final RecyclerView mRecyclerView;
private OnItemClickListener mOnItemClickListener;
private OnItemLongClickListener mOnItemLongClickListener;
private View.OnClickListener mOnClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mOnItemClickListener != null) {
RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
mOnItemClickListener.onItemClicked(mRecyclerView, holder.getAdapterPosition(), v);
}
}
};
private View.OnLongClickListener mOnLongClickListener = new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
if (mOnItemLongClickListener != null) {
RecyclerView.ViewHolder holder = mRecyclerView.getChildViewHolder(v);
return mOnItemLongClickListener.onItemLongClicked(mRecyclerView, holder.getAdapterPosition(), v);
}
return false;
}
};
private RecyclerView.OnChildAttachStateChangeListener mAttachListener
= new RecyclerView.OnChildAttachStateChangeListener() {
@Override
public void onChildViewAttachedToWindow(View view) {
if (mOnItemClickListener != null) {
view.setOnClickListener(mOnClickListener);
}
if (mOnItemLongClickListener != null) {
view.setOnLongClickListener(mOnLongClickListener);
}
}
@Override
public void onChildViewDetachedFromWindow(View view) {
}
};
private ItemClickSupport(RecyclerView recyclerView) {
mRecyclerView = recyclerView;
mRecyclerView.setTag(R.id.item_click_support, this);
mRecyclerView.addOnChildAttachStateChangeListener(mAttachListener);
}
public static ItemClickSupport addTo(RecyclerView view) {
ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
if (support == null) {
support = new ItemClickSupport(view);
}
return support;
}
public static ItemClickSupport removeFrom(RecyclerView view) {
ItemClickSupport support = (ItemClickSupport) view.getTag(R.id.item_click_support);
if (support != null) {
support.detach(view);
}
return support;
}
public ItemClickSupport setOnItemClickListener(OnItemClickListener listener) {
mOnItemClickListener = listener;
return this;
}
public ItemClickSupport setOnItemLongClickListener(OnItemLongClickListener listener) {
mOnItemLongClickListener = listener;
return this;
}
private void detach(RecyclerView view) {
view.removeOnChildAttachStateChangeListener(mAttachListener);
view.setTag(R.id.item_click_support, null);
}
public interface OnItemClickListener {
void onItemClicked(RecyclerView recyclerView, int position, View v);
}
public interface OnItemLongClickListener {
boolean onItemLongClicked(RecyclerView recyclerView, int position, View v);
}
}
您还需要定义R.id。使用ids.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<item name="item_click_support" type="id" />
</resources>
结果代码点击侦听器现在看起来像这样:
ItemClickSupport.addTo(mRecyclerView).setOnItemClickListener(new ItemClickSupport.OnItemClickListener() {
@Override
public void onItemClicked(RecyclerView recyclerView, int position, View v) {
// do it
}
});
关于recyclerview点击的简要说明,请看看这个littlerobots_blog
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