1
我已经实现了一个嵌套的ReyclerView（水平垂直），我不想为包装在CardView元素中的整个行添加一个点击侦听器。嵌套的RecyclerView onClickListener不工作
我遇到的问题是里面的RecyclerView捕获所有的触摸事件，而根CardView没有响应onClick事件。
我也试过让CardView拦截触摸事件，但是用这种方法涟漪效应（实际上任何反馈）都不起作用。
有人可以推荐一个解决方案，如何在嵌套RecyclerView的同时在一行上实现点击监听器？
谢谢。
--LE--
这是当前实现：
片段布局
<android.support.v7.widget.RecyclerView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/list"
android:name=".NestedRecyclerViewsFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layoutManager="LinearLayoutManager"
tools:context=".NestedRecyclerViewsFragment"
tools:listitem="@layout/fragment_nested_recyclerview_item"
/>
片段onCreateView（）实现
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_nested_recyclerview_list, container, false);
// Set the adapter
if (view instanceof RecyclerView) {
Context context = view.getContext();
RecyclerView recyclerView = (RecyclerView) view;
recyclerView.setLayoutManager(new LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false));
recyclerView.setHasFixedSize(true); // Improves performance - as we know the size doesn't change
//Initialize and set the adapter
mAdapter = new RootAdapter(context, mListener);
recyclerView.setAdapter(mAdapter);
final GestureDetector mGestureDetector =
new GestureDetector(view.getContext(), new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
});
recyclerView.addOnItemTouchListener(new RecyclerView.SimpleOnItemTouchListener() {
//TODO: intercept simple gestures like onClick and/or onLongClick
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && mGestureDetector.onTouchEvent(e)) {
//TODO: handle the intercept??
child.callOnClick();
return true;
}
return super.onInterceptTouchEvent(rv, e);
}
});
recyclerView.setNestedScrollingEnabled(true);
}
return view;
}
**根适配器布局**
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="@dimen/row_height"
android:layout_gravity="center_horizontal"
android:layout_margin="@dimen/none"
android:padding="@dimen/none"
app:cardCornerRadius="@dimen/none"
tools:context=".NestedRecyclerViewActivity"
<!-- Simple selector for API < 21 and ripple effect for APi >= 21 -->
android:foreground="@drawable/selector_default"
android:clickable="true"
android:focusable="true"
>
<!-- Horizontal image gallery inside row item -->
<android.support.v7.widget.RecyclerView
android:id="@+id/child_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
...
</android.support.v7.widget.CardView>
根适配器onBindView（）实现：
...
holder.childRecyclerView.setLayoutManager(new LinearLayoutManager(holder.mView.getContext(),
LinearLayoutManager.HORIZONTAL, false));
holder.childRecyclerView.setHasFixedSize(true); // We know the image don't change size
holder.childRecyclerView.setAdapter(new ChildAdapter(items));
...
根适配器ViewHolder实现：
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private ItemClickListener mClickListener;
/**
* The whole view - useful if you need to place some touch listener on the entire row.
*/
public final View mView;
/**
* The model associated with this view. - will be updated on bind method
*/
public Object mItem;
@Bind(R.id.child_recycler_view)
RecyclerView childRecyclerView;
...
public ViewHolder(View view) {
super(view);
ButterKnife.bind(this, view);
mView = view;
mView.setOnClickListener(this);
// Set the click listener bound to the fragment or activity
mClickListener = RootAdapter.this;
}
@Override
public void onClick(View v) {
if (null != mClickListener) {
mClickListener.onClick(v, getAdapterPosition());
}
}
}
内RecyclerView （孩子）是一个非常简单和标准的实现，没有任何听众设置它。
尽管此解决方案有效，并且我得到了单击事件和内部RecyclerView滚动工作，但我遇到了未显示点击反馈的问题。
LE：解决方案
我的需求变化不大，因为我张贴了这个问题，其与PagerAdapter更换内RecyclerView，但我实现了解决方案应该与嵌套RecyclerView也行。
基本上我用一个自定义的ItemClickSupport类，将尽快为他们被截获通过单击事件回父：
/**
* Utility class which adds the ability to add Click Support for RecyclerViews without the need to implement click
* listeners into the adapter or in the ViewHolder's implementation.
* <p>
* Use it by simply binding an click listener to the desired RecyclerView.
* <pre><code>
* ItemClickSupport.addTo(mRecyclerView).setOnItemClickListener(new ItemClickSupport.OnItemClickListener() {
* {@[email protected]}Override
* public void onItemClicked(RecyclerView recyclerView, int position, View v) {
* // Handle the clicked item
* }
* });
* </code></pre>
* </p>
* Based on <a href="http://www.littlerobots.nl/blog/Handle-Android-RecyclerView-Clicks/">Handle-Android-RecyclerView
* -Clicks</a>, <br/><b>Hugo Visser</b>. Which is very similar with the implementation from <a
* href="https://github.com/lucasr/twoway-view">TwoWay-View</a>.
* <p/>
* Created by ionut on 22.03.2016.
*/
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);
void onItemClicked(int position);
}
public interface OnItemLongClickListener {
boolean onItemLongClicked(RecyclerView recyclerView, int position, View v);
}
public static class SimpleOnItemClickListener implements OnItemClickListener {
@Override
public void onItemClicked(int position) {
}
@Override
public void onItemClicked(RecyclerView recyclerView, int position, View v) {
}
}
}
当创建根适配器，我设置的项目点击收听它，像这样：
ItemClickSupport.addTo(mRecyclerView).setOnItemClickListener(this);
而且我还通过setter方法发送该侦听器内转接器，像这样：
rootAdapter.setOnItemClickListener(this);
rootAdapter是根适配器，而this是我所在的当前片段，它实现了ItemClickSupportListener。
在根适配器，结合项目和创建内部适配器时，我通过对项目点击支持监听器内转接，像这样：
innerAdapter.setOnItemClickListener(new ItemClickSupport.SimpleOnItemClickListener() {
@Override
public void onItemClicked(int position) {
// Here we pass the click to the parent provided click listener.
// We modify the position with the one of the ViewHolder so that we don't get the
// position of the horizontal RecyclerView adapter - we are interested on the
// vertical item actually.
if (null != mItemClickListener) {
mItemClickListener.onItemClicked(holder.getAdapterPosition());
}
}
});
mItemClickListener实际上是监听器通过设定通过上面描述的setter方法片段化。
在内部适配器，在创建视图时，我设置了点击监听器布局的根，我膨胀，并通过该事件回到我的自定义点击收听：
// Detect the click events and pass them to any listeners
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (null != mOnItemClickListener) {
mOnItemClickListener.onItemClicked(position);
}
}
});
mOnItemClickListener实际上是项目点击由上述适配器传递的支持。
另一个重要的事情是使用的FrameLayout为适配器项目视图的内容，例如：
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:addStatesFromChildren="true"
android:foreground="@drawable/selector_default"
>
这里最重要的是将使用的选择和国旗android:addStatesFromChildren。这是为根适配器项目设置的。
内适配器项目也应该使用的FrameLayout作为内容视图，这样我们也可以用前景色属性设置它的选择：
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:foreground="@drawable/selector_default"
>
这是必要的，因为当内转接项目将捕捉到的点击事件，选择器被激活，否则父母应该对点击事件作出反应并激活它的选择器。
尝试在适配器上点击监听器设置为视图。 – Irfan
由于在onBindViewHolder（）方法中创建了子RecyclerView，这也意味着我将不得不为每个水平行项目创建一个侦听器。 此外，我不认为它会解决CardView选择器不再工作的问题。 –
现在你在哪里设置onClickListener？ – Irfan