但是,默认情况下隐藏底部：

并且仅在我滚动后显示.

从我的活动课：

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    TestFragment fragment = (TestFragment) getFragmentManager().findFragmentByTag("Test");
    if (fragment == null)
        fragment = new TestFragment();

    getFragmentManager().popBackStack();

    FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();

    fragmentTransaction.replace(R.id.fragment_container,fragment,"Test");
    fragmentTransaction.commit();
}

活动布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:app="http://schemas.android.com/apk/res-auto"
                android:layout_width="match_parent"
                android:layout_height="match_parent">

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

        <FrameLayout
            android:id="@+id/fragment_container"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

        <android.support.design.widget.AppBarLayout
            android:id="@+id/appbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

            <android.support.design.widget.TabLayout
                android:id="@+id/tabs"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                app:layout_scrollFlags="enterAlways|scroll"
                app:tabGravity="fill"
                app:tabMode="fixed"/>

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

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

</RelativeLayout>

片段布局：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:app="http://schemas.android.com/apk/res-auto"
                android:layout_width="match_parent"
                android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/bottomView"
        android:scrollbars="vertical"
        android:visibility="visible"/>

    <RelativeLayout
        android:id="@+id/bottomView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:background="#d4285d"
        app:layout_scrollFlags="enterAlways">

        <Button
            android:id="@+id/button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Do something..."
            android:textSize="14sp"/>

    </RelativeLayout>
</RelativeLayout>

这里的最终目标是片段始终在屏幕上显示底部栏,并且回收器视图滚动appbar.

这可能吗？

谢谢大家！