Android RecyclerView 中的 Swipe 和 OnClick 事件
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/26629971/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Swipe and OnClick events in RecyclerView
提问by Ivan Fork
I'm trying to implement a swipe to dismiss action in a RecyclerView but when I set an OnClickListener on any View in a ViewHolder it overrides all OnTouch events on that view.
我正在尝试在 RecyclerView 中实现滑动以关闭操作，但是当我在 ViewHolder 中的任何视图上设置 OnClickListener 时，它会覆盖该视图上的所有 OnTouch 事件。
I can abandon OnClickListener and handle all clicks in the TouchListener but if I have multiple buttons in a child view of the RecycleView than that will be a lot of code and this doesn't look like a right way.
我可以放弃 OnClickListener 并处理 TouchListener 中的所有点击，但是如果我在 RecycleView 的子视图中有多个按钮，那么这将是很多代码，这看起来不是正确的方法。
In my RecyleView I'm setting Swipe to dismiss listeners (similar to this):
在我的 RecyleView 中，我设置了 Swipe 来关闭监听器（类似于这个）：
setOnTouchListener(touchListener);
setOnScrollListener(touchListener.makeScrollListener());
It works in the ListView, but in the RecycleView the OnClickListener blocks OnTouchListner events.
它适用于 ListView，但在 RecycleView 中 OnClickListener 会阻止 OnTouchListner 事件。
Example of the layout for ViewHolder view.
ViewHolder 视图的布局示例。
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/card_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="72dp"
android:descendantFocusability="blocksDescendants">
<ImageView
android:id="@+id/keep_icon"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_centerInParent="true"
android:src="@drawable/ic_received" />
Inflating in the RecyclerView.Adapter:
在 RecyclerView.Adapter 中充气：
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = mInflater.inflate(R.layout.push_card_view_compat, viewGroup, false);
return new ViewHolder(v, onClickListener, onKeepListener);
}
The ViewHolder:
视图持有人：
public ViewHolder(final View itemView,
final OnViewHolderClickListener onClickListener,
final OnKeepListener onKeepListener) {
super(itemView);
keepButton = (ImageView) itemView.findViewById(R.id.keep_icon);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onItemClickListener.onClick(getPosition(), itemView);
}
});
keepButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onKeepListener.onClick(getPosition(), itemView);
}
});
}
回答by brnunes
I achieved that by assigning OnClickListenerfor the buttons in the ViewHolder, and creating an interface for the touch events.
我通过OnClickListener为 中的按钮分配ViewHolder，并为触摸事件创建界面来实现这一点。
The sample project is on GitHub: https://github.com/brnunes/SwipeableRecyclerView.
示例项目位于 GitHub 上：https: //github.com/brnunes/SwipeableRecyclerView。
In my case each item is a CardViewwith two buttons, and I want to detect the touch events in the CardViewand the Buttons. The CardViewlayout looks like this:
在我的情况下，每个项目都是一个CardView带有两个按钮的，我想检测sCardView和Buttons 中的触摸事件。该CardView布局是这样的：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:clickable="true"
android:foreground="?android:attr/selectableItemBackground"
android:orientation="vertical"
card_view:cardCornerRadius="5dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/card_view_title"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:gravity="center"
android:textColor="@android:color/black"
android:textSize="24sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_below="@id/card_view_title"
android:layout_centerHorizontal="true"
android:gravity="center">
<Button
android:id="@+id/card_view_button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button1" />
<Button
android:id="@+id/card_view_button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button2" />
</LinearLayout>
</RelativeLayout>
</android.support.v7.widget.CardView>
Then in the Activity, I declared an interface to receive the touch events:
然后在 中Activity，我声明了一个接口来接收触摸事件：
public interface OnItemTouchListener {
public void onCardViewTap(View view, int position);
public void onButton1Click(View view, int position);
public void onButton2Click(View view, int position);
}
And in the ViewHolderI assign OnClickListenersto the objects that I want to listen to, and call my custom listener:
在ViewHolder我分配OnClickListeners给我想听的对象，并调用我的自定义侦听器：
public class CardViewAdapter extends RecyclerView.Adapter<CardViewAdapter.ViewHolder> {
private List<String> cards;
private OnItemTouchListener onItemTouchListener;
public CardViewAdapter(List<String> cards, OnItemTouchListener onItemTouchListener) {
this.cards = cards;
this.onItemTouchListener = onItemTouchListener;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_view_layout, viewGroup, false);
return new ViewHolder(v);
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
viewHolder.title.setText(cards.get(i));
}
@Override
public int getItemCount() {
return cards == null ? 0 : cards.size();
}
public class ViewHolder extends RecyclerView.ViewHolder {
private TextView title;
private Button button1;
private Button button2;
public ViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.card_view_title);
button1 = (Button) itemView.findViewById(R.id.card_view_button1);
button2 = (Button) itemView.findViewById(R.id.card_view_button2);
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onItemTouchListener.onButton1Click(v, getPosition());
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onItemTouchListener.onButton2Click(v, getPosition());
}
});
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onItemTouchListener.onCardViewTap(v, getPosition());
}
});
}
}
}
Finally, instantiate the custom OnItemTouchListenerand pass it to the CardViewAdapterconstructor:
最后，实例化自定义OnItemTouchListener并将其传递给CardViewAdapter构造函数：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mItems = new ArrayList<>(30);
for (int i = 0; i < 30; i++) {
mItems.add(String.format("Card number %2d", i));
}
OnItemTouchListener itemTouchListener = new OnItemTouchListener() {
@Override
public void onCardViewTap(View view, int position) {
Toast.makeText(MainActivity.this, "Tapped " + mItems.get(position), Toast.LENGTH_SHORT).show();
}
@Override
public void onButton1Click(View view, int position) {
Toast.makeText(MainActivity.this, "Clicked Button1 in " + mItems.get(position), Toast.LENGTH_SHORT).show();
}
@Override
public void onButton2Click(View view, int position) {
Toast.makeText(MainActivity.this, "Clicked Button2 in " + mItems.get(position), Toast.LENGTH_SHORT).show();
}
};
mAdapter = new CardViewAdapter(mItems, itemTouchListener);
mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mRecyclerView.setAdapter(mAdapter);
// ... Assign the swipe listener
}
