danielgomezrico danielgomezrico - 4 months ago 28
Android Question

CoordinatorLayout, FAB and container layout conflict

I have a main activity with a drawer that have a

container layout
where I replace each fragment with
FragmentManager
.

I want to add a FAB to one of my child fragments that hide/show on scroll but Im not sure what Im doing wrong and get:

enter image description here

Layout:

<?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"
android:layout_width="match_parent"
android:layout_height="match_parent">

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

<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?actionBarSize"
android:minHeight="?actionBarSize"
android:theme="@style/Toolbar"
app:layout_scrollFlags="scroll|enterAlways" />

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

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

<android.support.design.widget.FloatingActionButton
style="@style/Widget.Design.FloatingActionButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right|end"
android:layout_marginBottom="@dimen/spacing_medium"
android:layout_marginRight="@dimen/spacing_medium"
android:elevation="@dimen/elevation_little"
app:fabSize="normal"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
app:srcCompat="@drawable/ic_add_white_18dp" />

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

Answer

add app:layout_anchor="@id/container" to your FAB. Also, by indicating bottom|right there is no need to include end

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