Bewegen Sie die Snackbar über die untere Leiste

ersetzen Sie Ihre xml ->

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    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/main_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="test.tab_activity">

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

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

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

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



    <android.support.v4.view.ViewPager
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <android.support.design.widget.CoordinatorLayout
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:id="@+id/placeSnackBar">

            <android.support.v4.view.ViewPager
                android:id="@+id/view_pager"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="1" />

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

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

        <android.support.design.widget.TabLayout
            android:id="@+id/tab_layout"
            android:layout_width="match_parent"
            android:layout_height="56dp"
            android:background="?attr/colorPrimary" />

    </LinearLayout>

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

und Die Snackbar code

Snackbar.make(findViewById(R.id.placeSnackBar), "Replace with your own action", Snackbar.LENGTH_LONG)
            .setAction("Action", null).show();

InformationsquelleAutor der Antwort Zahidul Islam

Vorausgesetzt, Ihre arbeiten mit CoordinatorLayout können Sie ändern Sie die Snackbar ist layoutparams vor dem Aufruf von show(). Durch die Einstellung der anchorId und anchorGravity der snackBar wird die Anzeige über dem unteren Navigationsleiste:

val layoutParams = snackbar.view.layoutParams as CoordinatorLayout.LayoutParams
layoutParams.anchorId = R.id.navigation //Id for your bottomNavBar or TabLayout
layoutParams.anchorGravity = Gravity.TOP
layoutParams.gravity = Gravity.TOP
snackbar.view.layoutParams = layoutParams

InformationsquelleAutor der Antwort user931289

Gibt es große Artikel über, wie es zu benutzen HIER. Da Sie wissen, wie zu machen snackbar oben BottomNavigationBar

Grundsätzlich den code unten präsentiert häufigste Verwendung Toolbar zusammen mit BottomNavigationBar und FrameLayout als Fragment-container

Wichtig! Beachten Sie, dass

1. fab-Taste verwendet Anker platziert werden ordnungsgemässen und useCompactPadding zu bewahren Margen

2. BottomNavigationView verwendet layout_behaviour zu handhaben scrollen und SnackBar position

   <android.support.design.widget.AppBarLayout
       android:id="@+id/myAppBar"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:descendantFocusability="beforeDescendants"
       android:focusableInTouchMode="true"
       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:contentInsetStart="0dp"
           app:layout_scrollFlags="scroll|enterAlways"
           app:popupTheme="@style/AppTheme.PopupOverlay"/>
   </android.support.design.widget.AppBarLayout>
   
   <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.BottomNavigationView
       android:id="@+id/navigation_bar"
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:layout_gravity="bottom"
       app:menu="@menu/bottom_navigation"
       app:layout_behavior="murt.shoppinglistapp.ui.BottomNavigationBehavior"
       android:background="?android:attr/windowBackground"
       />
   
   <android.support.design.widget.FloatingActionButton
       android:id="@+id/fab_add_shopping_list"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       app:useCompatPadding="true"
       app:srcCompat="@drawable/ic_add_24"
       app:layout_anchor="@id/navigation_bar"
       app:layout_anchorGravity="top|right"
       android:layout_gravity="top"
       />

Implmenetation des Verhaltens zögern Sie nicht zu verwenden ! Es ist einfach und freundlich 😉 (scrollen)

class BottomNavigationBehavior : CoordinatorLayout.Behavior<BottomNavigationView> {

    constructor(): super()

    constructor(context: Context, attrs: AttributeSet) : super(context, attrs)

    override fun layoutDependsOn(parent: CoordinatorLayout, child: BottomNavigationView,
                                 dependency: View): Boolean {
        if (dependency is Snackbar.SnackbarLayout) {
            updateSnackbar(child, dependency)
        }
        return super.layoutDependsOn(parent, child, dependency)
    }

    private fun updateSnackbar(child: View, snackbarLayout: Snackbar.SnackbarLayout) {
        if (snackbarLayout.layoutParams is CoordinatorLayout.LayoutParams) {
            val params = snackbarLayout.layoutParams as CoordinatorLayout.LayoutParams

            params.anchorId = child.id
            params.anchorGravity = Gravity.TOP
            params.gravity = Gravity.TOP
            snackbarLayout.layoutParams = params
        }
    }

    override fun onStartNestedScroll(
        coordinatorLayout: CoordinatorLayout,
        child: BottomNavigationView,
        directTargetChild: View,
        target: View,
        nestedScrollAxes: Int
    ): Boolean {
        return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL
    }

    override fun onNestedPreScroll(
        coordinatorLayout: CoordinatorLayout,
        child: BottomNavigationView,
        target: View,
        dx: Int,
        dy: Int,
        consumed: IntArray
    ) {
        if (dy < 0) {
            showBottomNavigationView(child)
        } else if (dy > 0) {
            hideBottomNavigationView(child)
        }
    }

    private fun hideBottomNavigationView(view: BottomNavigationView) {
        view.animate().translationY(view.height.toFloat())
    }

    private fun showBottomNavigationView(view: BottomNavigationView) {
        view.animate().translationY(0f)
    }
}

InformationsquelleAutor der Antwort murt