Question

我的RelativeLayout中有一个CoordinatorLayout（如下所示）。另请注意，RelativeLayout内有RecyclerView。

但是，当我滚动时，我只能滚动RecyclerView和仅屏幕的RecyclerView部分才会实际滚动。如果我尝试滚动RecyclerView上方的布局，则根本不会滚动屏幕。这是我对正在发生的事情做出的说明：

Demo

所以我的问题是，为什么我不能滚动内部RelativeLayout？我应该以不同的方式组织我的布局吗？

这是我的布局：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
    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/drawer"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:openDrawer="start">

    <android.support.design.widget.CoordinatorLayout
        android:id="@+id/main_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.design.widget.AppBarLayout
            android:id="@+id/appbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:theme="@style/AppTheme.AppBarOverlay">

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="?attr/colorPrimary"
                app:layout_scrollFlags="scroll|enterAlways"
                app:popupTheme="@style/AppTheme.PopupOverlay" />

        </android.support.design.widget.AppBarLayout>

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            app:layout_behavior="@string/appbar_scrolling_view_behavior">

            <RelativeLayout
                android:id="@+id/header"
                android:layout_width="match_parent"
                android:layout_height="250dp">

                // some imageviews and textviews

            </RelativeLayout>

            <android.support.v7.widget.RecyclerView
                android:id="@+id/recycler_view"
                android:scrollbars="vertical"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_below="@+id/header" />

        </RelativeLayout>

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|end"
            android:layout_margin="@dimen/fab_margin" />

    </android.support.design.widget.CoordinatorLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_drawer"
        app:menu="@menu/menu_navigation_drawer" />

</android.support.v4.widget.DrawerLayout>

我该如何解决这个问题？

Answer 1

RelativeLayout如果不在任何可滚动视图中，则不可滚动。
尝试将RelativeLayout作为RecyclerView的标题。

在此示例中，您可以滚动其内容

<ScrollView 
     ...
     ...>
         <!-- Scrollable Contents -->
</ScrollView>

在您的情况下，我认为最好的方法是让您的RecyclerView占据整个屏幕然后分配其标题。请遵循此link或this。那里有很多，所以只是谷歌了

Answer 2

好的，可以使用单个recyclerview并将标题relativelayout作为recyclerview的项目来完成。

您是否熟悉getItemViewType方法，该方法用于决定Recyclerview项目的项目类型。

将数据添加到dataset，您将使用该数据来决定某个项目的类型。请考虑以下示例......

    public class MyRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private final int ITEM_ROW = 1;
    private final int ITEM_HEADER = 2;

    // Will be your dataset which will be containing first item as relativeLayout payload.
    private ArrayList<Object> mData;

    public MyRecyclerViewAdapter(ArrayList<Object> mData) {
        this.mData = mData;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        RecyclerView.ViewHolder vh = null;
        if (viewType == ITEM_ROW) {
            // Inflate your row item of recyclerview here...

            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_checkout_review_cart_item, parent, false);
            vh = new ItemHolder(view);
        } else if (viewType == ITEM_HEADER) {

            // Inflate your relativeLayout here...

            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_order_detail_grand_total_item, parent, false);
            vh = new RelativeLayoutHolder(view);
        }
        return vh;
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
        if (holder instanceof ItemHolder) {

            // Bind item of recyclerview here...

        } else if (holder instanceof RelativeLayoutHolder) {

            // Bind data of your relativeLayout

        }
    }

    @Override
    public int getItemCount() {
        return mData.size();
    }

    @Override
    public int getItemViewType(int position) {
        // Decide type of an item using payload instances..
        Object obj = mData.get(position);
        if (obj instanceof ItemInfo) {
            return ITEM_ROW;
        } else if (obj instanceof RelativeLayoutInfo) {
            return ITEM_HEADER;
        } else {
            return -1;
        }
    }

    class ItemHolder extends RecyclerView.ViewHolder {

        ItemHolder(View itemView) {
            super(itemView);
        }
    }

    class RelativeLayoutHolder extends RecyclerView.ViewHolder {

        RelativeLayoutHolder(View itemView) {
            super(itemView);
        }
    }
}

您的Payload of dataset将决定itemType。两种类型的Pojo将插入您的dataset - RelativeLayoutInfo和ItemInfo。例如

public class ItemInfo implements Serializable {

     // Consider adding object and getter setter here
}

和

public class RelativeLayoutInfo implements Serializable {

   // Consider adding object and getter setter here
}

你去吧。您的relativeLayout被添加为recyclerview的项目。快乐的编码!!

CoordinatorLayout中的RelativeLayout不会滚动

2 个答案: