RecyclerView:如何添加OnClick()并保持onLongClick()工作？

Question

我有onClickListener一个CheckBox用于RecyclerView保存CardView列表的设置.在我的ItemHolder扩展中设置了监听器ViewHolder.初始点击CardView检查CheckBox并将CardView的背景颜色从默认的白色切换为红色.这工作正常.

我也有自己的OnClickListener设置CardView.它OnClickListener是在onCreateViewHolder().中设置的.单击将CardView启动新的详细活动CardView.这工作正常.

最后,我尝试onLongClickListener在CardView上设置一个.该OnLongClickListener设置在onCreateViewHolder().CardView上的longpress意味着将背景颜色切换为红色并启动AlertDialog,以便用户可以确认将从列表中删除CardView.这可以正常工作,但是当这个代码添加到适配器时OnClickListerner,CardView的CheckBox不再有效.就好像它OnLongClickListner与CheckBox监听器冲突一样.注意我在itemHolder的onLongClick()代码中"返回true" .我在这里错过了什么？

Adapter.java

public MyRecylerAdapter(Context context, ArrayList<ListItem> listItems, ArrayList<ListItem> selectedList) {
    this.mContext = context;
    this.mListItems = listItems;
    this.selectedItemsList = selectedList;
}

private int selectedPos = -1;
...

private class ItemHolder extends RecyclerView.ViewHolder implements View.OnClickListener {

    private CardView cardView;
    private CheckBox chkSelected;

    private ItemHolder(final View itemView) {
        super(itemView);

        cardView = (CardView) itemView.findViewById(R.id.singlecard_view1);
        chkSelected = (CheckBox) itemView.findViewById(R.id.chkSelected);
        chkSelected.setOnClickListener(this);
    }

    public void onClick(View v) {

        int adapterPos = getAdapterPosition();

        if (adapterPos == android.support.v7.widget.RecyclerView.NO_POSITION) return;
        if (recyclerItemClickListener !=null) {
            recyclerItemClickListener.onCheckBoxClick(v, adapterPos);
        }
        Integer iPos = adapterPos;

        if (((CheckBox)v).isChecked()) {
            checkedListItems.add(iPos);
        }
        else {
            checkedListItems.remove(iPos);
        }
    }

    void bind(int position) {

        if (checkedListItems.contains(position)) {
            chkSelected.setChecked(true);
        }
        else {
            chkSelected.setChecked(false);
        }
    }
}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_contact_item, parent, false);
    final ItemHolder itemHolder = new ItemHolder(view);

        itemHolder.itemView.setOnClickListener(new View.OnClickListener() {
            // Handles the row being clicked.
            @Override
            public void onClick(View view) {

                ListItem adapterItem = MyRecylerAdapter.this.getItem(itemHolder.getAdapterPosition()); 

                if (recyclerItemClickListener != null) {
                    recyclerItemClickListener.onItemClick(itemHolder.itemView, adapterItem);
                }
            }
        });

        itemHolder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View view) {

                ListItem adapterItem2 = MyRecylerAdapter.this.getItem(itemHolder.getAdapterPosition()); 

                    if (recyclerItemClickListener != null) {
                        recyclerItemClickListener.onItemLongClick(itemHolder.itemView, adapterItem2);
                    }

                int adapterPos2 = itemHolder.getAdapterPosition(); 
                if (adapterPos2 != android.support.v7.widget.RecyclerView.NO_POSITION) {
                    int lastSelectedPosition = selectedPos;
                    selectedPos = adapterPos2;
                    notifyItemChanged(lastSelectedPosition);
                    notifyItemChanged(selectedPos);
                }                    
                return true;
            }
        });
    return itemHolder;
}

public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) {

    final ListItem listItem = mListItems.get(position);
    final ItemHolder itemHolder = (ItemHolder) holder;

    itemHolder.bind(position);

    if (checkedListItems.contains(position)) {
        itemHolder.cardView.setActivated(true);
    }
    else {
        itemHolder.cardView.setActivated(false);
    }        

    // **The addition of the below code causes the "itemHolder.cardView.
    // setActivated(true);" in onBindViewHolder method to no longer fire, as 
    // a click on the CheckBox no longer changes the CardView background 
    // color.**
    if (itemHolder.getAdapterPosition() == selectedPos) {
        itemHolder.cardView.setActivated(true);
    } else {
        itemHolder.cardView.setActivated(false);
    }

list_contact_item.xml

<?xml version="1.0" encoding="utf-8"?>

<android.support.v7.widget.CardView
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/singlecard_view1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:foreground="?android:attr/selectableItemBackground"
     >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/statelist_cardview_background"  >

    <CheckBox
        android:id="@+id/chkSelected"
        android:layout_width="wrap_content"
        android:layout_height="30dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="4dp"
        android:layout_marginStart="4dp"
        android:layout_marginTop="4dp"
        android:gravity="center"  />

    <TextView
        android:id="@+id/cardType1"
        android:layout_width="wrap_content"
        android:layout_height="30dp"
        android:layout_toRightOf="@+id/chkSelected"
        android:layout_toEndOf="@+id/chkSelected"
        android:layout_alignParentTop="true"
        android:paddingStart="3dp"
        android:paddingLeft="3dp"
        android:paddingEnd="6dp"
        android:paddingRight="6dp"
        android:layout_marginTop="4dp"
        android:gravity="center"
        android:textColor="#ffffff"
        android:textStyle="bold|italic"
        style="@style/Base.TextAppearance.AppCompat.Subhead"  />

    <TextView
        android:id="@+id/cardBlankText1"
        android:layout_width="wrap_content"
        android:layout_height="30dp"
        android:layout_alignParentTop="true"
        android:layout_toRightOf="@+id/cardType1"
        android:layout_toEndOf="@+id/cardType1"
        android:layout_toLeftOf="@+id/cardBlankTextNumstotal"
        android:layout_toStartOf="@+id/cardBlankTextNumstotal"
        android:layout_marginTop="4dp"
        android:gravity="center_vertical|end"
        android:text="#"
        android:textColor="@color/colorFlLabelFinal"
        android:textStyle="bold"
        android:maxLines="1"
        style="@style/Base.TextAppearance.AppCompat.Subhead"  />

    <TextView
        android:id="@+id/cardBlankTextNumstotal"
        android:layout_width="wrap_content"
        android:layout_height="30dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentRight="true"
        android:gravity="center"
        android:text="actual card #"
        android:layout_marginTop="4dp"
        android:layout_marginRight="4dp"
        android:layout_marginEnd="4dp"
        android:freezesText="true"
        android:textColor="@android:color/black"
        android:maxLines="1"
        style="@style/Base.TextAppearance.AppCompat.Subhead"  />        

    <TextView
        android:id="@+id/cardBlankText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/chkSelected"
        android:layout_marginTop="4dp"
        android:layout_marginLeft="6dp"
        android:layout_marginStart="6dp"
        android:text="todo"
        android:textColor="@android:color/black"
        android:textStyle="bold"
        android:background="@drawable/todo_underline"
        android:maxLines="1"
        style="@style/Base.TextAppearance.AppCompat.Headline"  />

    ...
    </RelativeLayout>

</android.support.v7.widget.CardView>

statelist_cardview_background.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_activated="true"

        android:drawable="@color/item_selected" />

    <item android:state_activated="false"

        android:drawable="@color/list_contact_item_default"  />

</selector>

colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <color name="list_contact_item_default">#FFFFFF</color>
    <color name="item_selected">#FF0000</color>

</resources>

Answer 1

看来你在这里试图解决错误的问题。您不应在卡片视图本身上设置单击和长按侦听器。

• 您可以在复选框上单击侦听器或checkedChangeListener
• 单击和长按监听器可以位于view_container的其余部分

在这里，如果您想在单击view_container 时选中/取消选中复选框，您可以在 view_container 的onClick侦听器中轻松完成此操作。

编辑：我已经更新了您的布局文件，请注意现在您已将 FrameLayout 作为relativelayout（view_container）和复选框的父级。

由于复选框是在RelativeLayout之后添加的，因此它将在view_container顶部可见。希望它对你有用。

现在您可以按照我上面的说明设置点击侦听器。

更新布局文件

<?xml version="1.0" encoding="utf-8"?>

<android.support.v7.widget.CardView
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/singlecard_view1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:foreground="?android:attr/selectableItemBackground"
    >
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <RelativeLayout
        android:id="@+id/view_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/statelist_cardview_background"  >


        <TextView
            android:id="@+id/cardType1"
            android:layout_width="wrap_content"
            android:layout_height="30dp"
            android:layout_marginLeft="30dp"
            android:layout_marginStart="30dp"
            android:layout_alignParentTop="true"
            android:paddingStart="3dp"
            android:paddingLeft="3dp"
            android:paddingEnd="6dp"
            android:paddingRight="6dp"
            android:layout_marginTop="4dp"
            android:gravity="center"
            android:textColor="#ffffff"
            android:textStyle="bold|italic"
            style="@style/Base.TextAppearance.AppCompat.Subhead"  />

        <TextView
            android:id="@+id/cardBlankText1"
            android:layout_width="wrap_content"
            android:layout_height="30dp"
            android:layout_alignParentTop="true"
            android:layout_toRightOf="@+id/cardType1"
            android:layout_toEndOf="@+id/cardType1"
            android:layout_toLeftOf="@+id/cardBlankTextNumstotal"
            android:layout_toStartOf="@+id/cardBlankTextNumstotal"
            android:layout_marginTop="4dp"
            android:gravity="center_vertical|end"
            android:text="#"
            android:textColor="@color/colorFlLabelFinal"
            android:textStyle="bold"
            android:maxLines="1"
            style="@style/Base.TextAppearance.AppCompat.Subhead"  />

        <TextView
            android:id="@+id/cardBlankTextNumstotal"
            android:layout_width="wrap_content"
            android:layout_height="30dp"
            android:layout_alignParentTop="true"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true"
            android:gravity="center"
            android:text="actual card #"
            android:layout_marginTop="4dp"
            android:layout_marginRight="4dp"
            android:layout_marginEnd="4dp"
            android:freezesText="true"
            android:textColor="@android:color/black"
            android:maxLines="1"
            style="@style/Base.TextAppearance.AppCompat.Subhead"  />

        <TextView
            android:id="@+id/cardBlankText2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_marginTop="34dp"
            android:layout_marginLeft="6dp"
            android:layout_marginStart="6dp"
            android:text="todo"
            android:textColor="@android:color/black"
            android:textStyle="bold"
            android:background="@drawable/todo_underline"
            android:maxLines="1"
            style="@style/Base.TextAppearance.AppCompat.Headline"  />

        ...
    </RelativeLayout>
        <CheckBox
            android:id="@+id/chkSelected"
            android:layout_width="wrap_content"
            android:layout_height="30dp"
            android:layout_alignParentTop="true"
            android:layout_alignParentStart="true"
            android:layout_alignParentLeft="true"
            android:layout_marginLeft="4dp"
            android:layout_marginStart="4dp"
            android:layout_marginTop="4dp"
            android:gravity="center"  />

    </FrameLayout>


</android.support.v7.widget.CardView>