Two floating action buttons next to each other

Question

The material design documentation has an example of Google Maps showing two floating action buttons next to one another (actually, one above the other).

Answer 1

I can't believe no one has posted the correct answer.

Wrap the buttons in a ViewGroup and apply the dodgeInsetEdges layout parameter so that the buttons move up with the bottom sheet. For the above use case, we can use a LinearLayout with the XML attribute app:layout_dodgeInsetEdges="bottom".

Note that we can apply this to any view in a CoordinatorLayout.

<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto" ... >

    <!-- We can use any ViewGroup here. LinearLayout is the
         obvious choice for the questioner's use case. -->
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        android:orientation="vertical"
        app:layout_dodgeInsetEdges="bottom">

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/upperFab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginBottom="@dimen/fab_margin"
            android:src="@drawable/upper_fab_icon" />

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/lowerFab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/lower_fab_icon" />

    </LinearLayout>

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

Answer 2

Two floating action buttons with 100dp space in between them is as follows:

<android.support.design.widget.FloatingActionButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentEnd="true"
    android:layout_alignParentRight="true"
    android:layout_gravity="top|end"
    android:layout_marginBottom="100dp"
    android:src="@android:drawable/ic_input_add"
    app:layout_anchor="@id/fab"
    app:layout_anchorGravity="top" />

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

Answer 3

Here is my solution, just put an invisible fab between the two fabs, and works well with CoordinatorLayout.

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

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab_invisible"
    android:layout_width="@dimen/fab_margin"
    android:layout_height="@dimen/fab_margin"
    android:layout_gravity="top|end"
    android:layout_margin="@dimen/fab_margin"
    android:visibility="invisible"
    app:layout_anchor="@id/fab"
    app:layout_anchorGravity="top" />

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab_follow"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="top|end"
    android:layout_margin="@dimen/fab_margin"
    android:src="@drawable/ic_gps_fixed_follow"
    app:backgroundTint="@android:color/white"
    app:layout_anchor="@id/fab_invisible"
    app:layout_anchorGravity="top" />

No Snackbar

With Snackbar

Answer 4

It is a combination of layout gravity and anchor gravity together with playing with the margins (of the anchored item) that can make it work, have a look at the xml below which I have used successfully:

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

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="top|end"
    android:layout_marginBottom="0dp"
    android:layout_marginEnd="0dp"
    android:layout_marginLeft="0dp"
    android:layout_marginRight="0dp"
    android:layout_marginStart="0dp"
    android:layout_marginTop="0dp"
    android:src="@android:drawable/ic_media_play"
    app:layout_anchor="@id/fab"
    app:layout_anchorGravity="top" />

Answer 5

A very simple way (that worked for me!) was to just put the two floating buttons in a vertical linear layout at the bottom/end of its parent.

    <LinearLayout
    android:layout_gravity="bottom|end"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    >
    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_marginEnd="@dimen/fab_margin"
        app:srcCompat="@android:drawable/ic_menu_send" />
    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        app:srcCompat="@android:drawable/ic_menu_send" />
</LinearLayout>

Just adjust the layout_margin attributes for the floating buttons to get the spacing as you want it.

Answer 6

The accepted answer (at the time of writing this) - https://stackoverflow.com/a/33900363/4414887 worked only partially as the buttons were sticking together.

I was unable to use any other provided answers as well. So I found a workaround.

Add a view in between the 2 FABs like so -

<com.google.android.material.floatingactionbutton.FloatingActionButton
    android:id="@+id/fab2"
    android:src="@drawable/ic_delete_white_24dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="top|end"
    app:layout_anchor="@id/view"/>

<View
    android:id="@+id/view"
    android:layout_width="10dp"
    android:layout_height="10dp"
    android:layout_gravity="top|end"
    app:layout_anchor="@id/fab"
    />

<com.google.android.material.floatingactionbutton.FloatingActionButton
    android:id="@+id/fab"
    android:src="@drawable/ic_done_white_24dp"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:backgroundTint="@color/colorPrimary"
    app:layout_anchor="@id/bar2" />