当我向上滚动RecyclerView时,工具栏和TabLayout不会隐藏

时间:2020-08-20 15:44:49

标签: java android toolbar android-tablayout

当我向上滚动时,很难隐藏ToolbarTabLayout。我有3个不同的xml文件:1)Toolbar,2)TabLayoutFragment(这里有TabLayoutViewPager,我包括 toolbar,和3)HomeFragment(包含RecyclerView)。向上滚动时,我需要隐藏Toolbar,并且在许多其他帖子中,我发现大多数人使用CoordinatorLayout而不是Relative LayoutLinear Layout,并且那么他们必须添加我已经完成的app:layout_scrollFlags="scroll|enterAlways",但是在向上滚动Toolbar时仍然无法隐藏RecyclerView

我还将此添加到了RecyclerView,但仍然没有任何内容……app:layout_behavior="@string/appbar_scrolling_view_behavior"

有人可以指出这里缺少什么吗?

工具栏

<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/toolbar_events"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#fff"
    android:fitsSystemWindows="true">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar_home_fragment"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#fff"
            app:contentInsetEnd="0dp"
            app:contentInsetLeft="0dp"
            app:contentInsetRight="0dp"
            app:contentInsetStart="0dp"
            app:contentInsetStartWithNavigation="0dp"
            app:layout_scrollFlags="scroll|enterAlways"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light">

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerHorizontal="true"
                    android:layout_centerVertical="true"
                    android:fontFamily="@font/scriptbl"
                    android:text="Events"
                    android:textColor="@color/colorBlack"
                    android:textSize="60sp" />

                <ImageView
                    android:id="@+id/search"
                    style="@style/SelectableIconThemeBackground"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentEnd="true"
                    android:layout_centerVertical="true"
                    android:layout_marginEnd="10dp"
                    android:contentDescription="@string/camera"
                    android:padding="10dp"
                    android:src="@drawable/icon_search" />

                <ImageView
                    android:id="@+id/filter"
                    style="@style/SelectableIconThemeBackground"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_centerVertical="true"
                    android:layout_toStartOf="@+id/search"
                    android:contentDescription="@string/camera"
                    android:padding="10dp"
                    android:src="@drawable/icon10_sort" />

                <ImageView
                    android:id="@+id/options"
                    style="@style/SelectableIconThemeBackground"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentStart="true"
                    android:layout_centerVertical="true"
                    android:layout_marginStart="10dp"
                    android:contentDescription="@string/options"
                    android:padding="10dp"
                    android:src="@drawable/icon_short_text" />

            </RelativeLayout>

        </androidx.appcompat.widget.Toolbar>

    </com.google.android.material.appbar.AppBarLayout>

</androidx.coordinatorlayout.widget.CoordinatorLayout>

TabLayoutFragment

<LinearLayout 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/fragment_home_tab_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:tag="Home"
    tools:context=".Fragment.TabLayoutFragment">

    <include
        android:id="@+id/toolbar_events"
        layout="@layout/toolbar_events" />

    <com.google.android.material.tabs.TabLayout
        android:id="@+id/tab_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:background="#fff"
        app:layout_scrollFlags="scroll|enterAlways"
        app:tabIndicatorColor="#000"
        app:tabIndicatorFullWidth="false"
        app:tabRippleColor="@android:color/transparent"
        app:tabSelectedTextColor="@color/colorBlack"
        app:tabTextColor="@color/colorBlack" />

    <androidx.viewpager.widget.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#fff"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

</LinearLayout>

HomeFragment

<RelativeLayout 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/fragment_home"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    android:orientation="vertical"
    android:tag="fragment_home"
    tools:context=".Fragment.HomeFragment">

    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        android:id="@+id/refresh"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_below="@+id/toolbar">

            <TextView
                android:id="@+id/welcome"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_marginTop="100dp"
                android:gravity="center"
                android:text="Welcome to Events!"
                android:textColor="#d9d9d9"
                android:textSize="36sp"
                android:visibility="gone" />

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <TextView
                    android:id="@+id/location"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:drawablePadding="5dp"
                    android:gravity="center_horizontal"
                    android:padding="8dp"
                    app:drawableStartCompat="@drawable/icon_loc" />

                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/recycler_view"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/location"
                    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

            </RelativeLayout>

            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/recycler_view_following"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:visibility="gone"
                app:layout_behavior="@string/appbar_scrolling_view_behavior" />

        </RelativeLayout>

    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

</RelativeLayout>

2 个答案:

答案 0 :(得分:3)

您可以通过添加addOnScrollListener方法来通过编程实现。

RecyclerView.SCROLL_STATE_DRAGGING方法上,隐藏工具栏和TabLayout;在RecyclerView.SCROLL_STATE_IDLE方法上,如果想再次显示它们,则可以再次显示它。

您可以通过以下方式尝试:

recyclerview.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
    if (newState == RecyclerView.SCROLL_STATE_IDLE) {
        // Show your view again.. If you want to show them..
    } else if (newState == RecyclerView.SCROLL_STATE_DRAGGING) {
        // Hide your view..
    }

    super.onScrollStateChanged(recyclerView, newState);

}});

或者您可以使用回收站视图的addOnScrollListener方法:

引用:addOnScrollListener

recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
    if (dy > 0) {
        //Scrolling down
        // Show your controllers from here
    } else if (dy < 0) {
        //Scrolling up
        // Hide your controllers from here
    }
}});

此外,您可以在其中添加一些动画,以显示和隐藏工具栏和标签的布局。

答案 1 :(得分:0)

将工具栏和TabLayout放置在ScrollView组中,以获取滚动部分。

<ScrollView>
   <Toolbar></Toolbar>
   <Tablayout></Tablayout>
</ScrollView>