单击 recyclerview 时父单击事件未触发
Parent click event not firing when recyclerview clicked
我有一个 RecyclerView，它位于具有几个 TextView 的 CardView 中。 CardView 有一个 OnClickListener 设置，当点击 TextViews 时被触发，但当点击 RecyclerView 时不会触发。
CardView 的外观如下：
<?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:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
card_view:cardCornerRadius="4dp"
card_view:cardElevation="5dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="100"
android:minWidth="100dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/text1"
android:textColor="@color/abc_primary_text_material_light"
android:layout_weight="1"
android:layout_gravity="center_horizontal" />
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:listSelector="@color/highlighted_text_material_light"
android:layout_weight="98" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@android:color/black" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/relativeSummary"
android:orientation="horizontal"
android:layout_weight="1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/text2"
android:textAlignment="viewEnd"
android:textColor="@color/abc_secondary_text_material_light"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:gravity="start"
android:singleLine="true"
android:layout_alignParentLeft="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/text3"
android:textColor="@color/abc_primary_text_material_light"
android:layout_marginRight="5dp"
android:layout_marginLeft="5dp"
android:gravity="end"
android:singleLine="true"
android:layout_alignParentRight="true"
android:layout_toRightOf="@+id/text2" />
</RelativeLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
我不需要此 RecyclerView 的点击侦听器，实际上只需要在点击 RecyclerView 时触发父视图的点击事件（OnLongClick 事件也是如此）。我还需要 RecyclerView 来滚动。 RecyclerView 是如何处理点击事件而不将其传递给父级的？
我想出了如何将点击事件发送到 RecyclerView 的父级。我的解决方案有点像 hack，所以我希望有人能想出更好的解决方案。
在RecylerView.Adapter中：
@Override
public ViewHolder onCreateViewHolder(final ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.my_item_layout, viewGroup, false);
ViewHolder viewHolder = new ViewHolder(view);
viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
viewGroup.callOnClick();
}
});
viewHolder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
return viewGroup.performLongClick();
}
});
return viewHolder;
}
然后我不得不在 RecyclerView 上连接点击事件：
RecyclerView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
parentView.callOnClick();
}
});
RecyclerView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
return parentView.performLongClick();
}
});
有更好的解决办法。也就是说，子类化你的 CardView:
public class InterceptTouchCardView extends CardView {
public InterceptTouchCardView(Context context) {
super(context);
}
public InterceptTouchCardView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public InterceptTouchCardView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
/**
* Intercept touch event so that inner views cannot receive it.
*
* If a ViewGroup contains a RecyclerView and has an OnTouchListener or something like that,
* touch events will be directly delivered to inner RecyclerView and handled by it. As a result,
* parent ViewGroup won't receive the touch event any longer.
*/
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return true;
}
}
@ywwynm，除了解决方案不允许嵌套的 RecyclerView 滚动之外，您走在正确的轨道上。我将它与解决方案 here 相结合，并想出了这个解决方案来处理 click 和 onLongClick 事件以及允许滚动。
public class InterceptTouchCardView extends CardView {
private GestureDetector mGestureDetector;
private boolean mLongClicked;
public InterceptTouchCardView(Context context) {
super(context);
Initialize();
}
public InterceptTouchCardView(Context context, AttributeSet attrs) {
super(context, attrs);
Initialize();
}
public InterceptTouchCardView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
Initialize();
}
private void Initialize() {
mGestureDetector = new GestureDetector(getContext(),
new GestureDetector.SimpleOnGestureListener() {
public boolean onDown(MotionEvent e) {
mLongClicked = false;
return true;
}
public void onLongPress(MotionEvent e) {
mLongClicked = true;
performLongClick();
}
});
}
/**
* Intercept touch event so that inner views cannot receive it.
*
* If a ViewGroup contains a RecyclerView and has an OnTouchListener or something like that,
* touch events will be directly delivered to inner RecyclerView and handled by it. As a result,
* parent ViewGroup won't receive the touch event any longer.
*
* We can't Intercept the touch event if we want to allow scrolling since ACTION_DOWN always
* happens before ACTION_MOVE. So handle touch events here since onTouchEvent won't be triggered.
*/
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
mGestureDetector.onTouchEvent(ev);
if (ev.getAction() == MotionEvent.ACTION_UP && !mLongClicked)
this.callOnClick();
return false;
}
}
recyclerView.setLayoutFrozen(true);
在 recyclerView 的 setAdapter 之后将 LayoutFrozen 设为 true
在我的例子中，我有一个带有几个按钮的 CardView 和一个 RecyclerView。使用 and 的解决方案，问题是 CardView 会拦截来自其所有子视图的事件，包括按钮。但我想要的是 CardView 只拦截 RecyclerView 的触摸事件。我的解决方案如下：
public class UntouchableRecyclerView extends RecyclerView {
public UntouchableRecyclerView(Context context) {
super(context);
}
public UntouchableRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public UntouchableRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public boolean onTouchEvent(MotionEvent e) {
return false;
}
}
我有一个 RecyclerView，它位于具有几个 TextView 的 CardView 中。 CardView 有一个 OnClickListener 设置，当点击 TextViews 时被触发，但当点击 RecyclerView 时不会触发。
CardView 的外观如下：
<?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:id="@+id/card_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
card_view:cardCornerRadius="4dp"
card_view:cardElevation="5dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="100"
android:minWidth="100dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/text1"
android:textColor="@color/abc_primary_text_material_light"
android:layout_weight="1"
android:layout_gravity="center_horizontal" />
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:listSelector="@color/highlighted_text_material_light"
android:layout_weight="98" />
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@android:color/black" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/relativeSummary"
android:orientation="horizontal"
android:layout_weight="1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/text2"
android:textAlignment="viewEnd"
android:textColor="@color/abc_secondary_text_material_light"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:gravity="start"
android:singleLine="true"
android:layout_alignParentLeft="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/text3"
android:textColor="@color/abc_primary_text_material_light"
android:layout_marginRight="5dp"
android:layout_marginLeft="5dp"
android:gravity="end"
android:singleLine="true"
android:layout_alignParentRight="true"
android:layout_toRightOf="@+id/text2" />
</RelativeLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
我不需要此 RecyclerView 的点击侦听器，实际上只需要在点击 RecyclerView 时触发父视图的点击事件（OnLongClick 事件也是如此）。我还需要 RecyclerView 来滚动。 RecyclerView 是如何处理点击事件而不将其传递给父级的？
我想出了如何将点击事件发送到 RecyclerView 的父级。我的解决方案有点像 hack，所以我希望有人能想出更好的解决方案。
在RecylerView.Adapter中：
@Override
public ViewHolder onCreateViewHolder(final ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.my_item_layout, viewGroup, false);
ViewHolder viewHolder = new ViewHolder(view);
viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
viewGroup.callOnClick();
}
});
viewHolder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
return viewGroup.performLongClick();
}
});
return viewHolder;
}
然后我不得不在 RecyclerView 上连接点击事件：
RecyclerView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
parentView.callOnClick();
}
});
RecyclerView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
return parentView.performLongClick();
}
});
有更好的解决办法。也就是说，子类化你的 CardView:
public class InterceptTouchCardView extends CardView {
public InterceptTouchCardView(Context context) {
super(context);
}
public InterceptTouchCardView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public InterceptTouchCardView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
/**
* Intercept touch event so that inner views cannot receive it.
*
* If a ViewGroup contains a RecyclerView and has an OnTouchListener or something like that,
* touch events will be directly delivered to inner RecyclerView and handled by it. As a result,
* parent ViewGroup won't receive the touch event any longer.
*/
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return true;
}
}
@ywwynm，除了解决方案不允许嵌套的 RecyclerView 滚动之外，您走在正确的轨道上。我将它与解决方案 here 相结合，并想出了这个解决方案来处理 click 和 onLongClick 事件以及允许滚动。
public class InterceptTouchCardView extends CardView {
private GestureDetector mGestureDetector;
private boolean mLongClicked;
public InterceptTouchCardView(Context context) {
super(context);
Initialize();
}
public InterceptTouchCardView(Context context, AttributeSet attrs) {
super(context, attrs);
Initialize();
}
public InterceptTouchCardView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
Initialize();
}
private void Initialize() {
mGestureDetector = new GestureDetector(getContext(),
new GestureDetector.SimpleOnGestureListener() {
public boolean onDown(MotionEvent e) {
mLongClicked = false;
return true;
}
public void onLongPress(MotionEvent e) {
mLongClicked = true;
performLongClick();
}
});
}
/**
* Intercept touch event so that inner views cannot receive it.
*
* If a ViewGroup contains a RecyclerView and has an OnTouchListener or something like that,
* touch events will be directly delivered to inner RecyclerView and handled by it. As a result,
* parent ViewGroup won't receive the touch event any longer.
*
* We can't Intercept the touch event if we want to allow scrolling since ACTION_DOWN always
* happens before ACTION_MOVE. So handle touch events here since onTouchEvent won't be triggered.
*/
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
mGestureDetector.onTouchEvent(ev);
if (ev.getAction() == MotionEvent.ACTION_UP && !mLongClicked)
this.callOnClick();
return false;
}
}
recyclerView.setLayoutFrozen(true);
在 recyclerView 的 setAdapter 之后将 LayoutFrozen 设为 true
在我的例子中，我有一个带有几个按钮的 CardView 和一个 RecyclerView。使用
public class UntouchableRecyclerView extends RecyclerView {
public UntouchableRecyclerView(Context context) {
super(context);
}
public UntouchableRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public UntouchableRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
@Override
public boolean onTouchEvent(MotionEvent e) {
return false;
}
}