BottomAppBar被推离屏幕 [英] BottomAppBar being pushed off screen

问题描述

当我使用底部的应用程序栏从任何片段切换回购物清单时，它会被推离屏幕，我也不知道为什么.在冰箱片段"和食品间片段"之间切换很有效，但是从其中一个切换回购物清单片段"会将栏推离屏幕，如下所示:

When I switch from any fragment back to Shopping List with the bottom app bar, it gets pushed down off the screen and I don't know why. Switching between the Fridge Fragment and Pantry Fragment works great, but switching from either of those back to the Shopping List Fragment pushes the bar off the screen, as shown here:

带有完整代码的Github存储库

推荐答案

尝试对FrameLayout进行这些更改，我想之后您将不需要fragment_navigation.xml.

Try with these changes for FrameLayout and I guess you won't need fragment_navigation.xml after that.

activity_main.xml :

activity_main.xml:

<androidx.coordinatorlayout.widget.CoordinatorLayout 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">

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

    <com.google.android.material.bottomappbar.BottomAppBar
        android:id="@+id/bottom_app_bar"
        style="@style/Widget.MaterialComponents.BottomAppBar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:theme="@style/ThemeOverlay.MaterialComponents.Dark.ActionBar"
        app:backgroundTint="@color/colorPrimary"
        app:hideOnScroll="true"
        app:layout_scrollFlags="scroll|enterAlways"
        app:navigationIcon="@drawable/ic_menu_white_24dp" />

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_add_shopping_cart_white_24dp"
        app:fabSize="normal"
        app:layout_anchor="@id/bottom_app_bar" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

您还说过，当您切换到具有

You also said that it happens when you switch to ShoppingListFragment which has another CoordinatorLayout in there.

您只需更改fragment_shopping_list.xml代码，如下所示:

You simply change fragment_shopping_list.xml codes as follows:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/shopping_fragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="141dp"
        android:text="TextView" />

</RelativeLayout>

或者只是不要在其中使用CoordinatorLayout，然后尝试.

Or just don't use CoordinatorLayout in there then try.

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