我想添加隱藏/顯示回滾視圖滾動時的佈局。當recyclerview向下滾動時,該佈局將隱藏,並顯示recyclerview向上滾動的時間,如twitter的新推文佈局。我可以爲appbarlayout做到這一點,但我無法做到這一佈局。我怎樣才能做到這一點?如何在recyclerview滾動時隱藏/顯示佈局(如Twitter的新推文佈局)
http://i.hizliresim.com/rVyDq3.png
紫色的佈局將隱藏顯示像動作條:
http://i.hizliresim.com/gAMp92.png
這裏是我的佈局文件:
<android.support.v4.widget.DrawerLayout
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:elevation="7dp">
<!-- my main content -->
<android.support.design.widget.CoordinatorLayout
android:id="@+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="@+id/tool_bar"
style="@style/ToolBarStyle"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
app:layout_scrollFlags="scroll|enterAlways" />
<LinearLayout
android:orientation="vertical"
android:id="@+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="48dp"
android:background="@color/color_accent_pink">
</LinearLayout>
</android.support.design.widget.AppBarLayout>
<android.support.v7.widget.RecyclerView
android:id="@+id/newsRecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical"
android:clickable="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
<!-- that layout will hide/show when recyclerview scroll -->
<LinearLayout
android:orientation="horizontal"
android:id="@+id/takimlar"
android:layout_width="match_parent"
android:layout_height="48dp"
android:background="@color/bg_group_item_swiping_active_state"
android:layout_gravity="bottom" >
</LinearLayout>
</android.support.design.widget.CoordinatorLayout>
<!-- my navigation drawer -->
<RelativeLayout
android:id="@+id/container"
android:layout_width="235dp"
android:layout_height="match_parent"
android:layout_gravity="left"
android:background="@color/myDrawerBackground">
<TextView
android:id="@+id/merhabaText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="400dp"
android:layout_marginRight="40dp"
android:layout_alignParentRight="true"
android:text="Hello!"/>
</RelativeLayout>