如何更改扩展浮动操作按钮的形状？

Question

I am trying to change the shape of my action button from this default shape to a rectangle. Here is my xml:

<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:cornerRadius="90dp"
        android:text="@string/create_player_text"
        android:fontFamily="@font/proximanova_semibold"
        app:layout_constraintHorizontal_bias="0.99"
        app:layout_constraintVertical_bias="0.01"/>

Answer 1

If you want to change the shape of the ExtendedFloatingActionButton you can use the shapeAppearanceOverlay attribute in the layout:

    <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
        app:shapeAppearanceOverlay="@style/ShapeAppearanceOverlayExtended"
        ../>

With:

  <style name="ShapeAppearanceOverlayExtended" parent="">
    <item name="cornerFamily">rounded</item>
    <item name="cornerSize">0dp</item>
  </style>

If you want a corner radius just change the value in the <item name="cornerSize">0dp</item> .

Answer 2

I think Material Button would fit perfectly regarding to your needed, also Material Button have rectangular shape with small radius in corners. You should try it instead using Extended Floating Action Button.

Check the Official document how to use it with guidelines

Material Button

Answer 3

Create an xml file like this:

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape
            android:shape="rectangle">
            <corners android:radius="@dimen/_100sdp"/>
        </shape>
    </item>
</layer-list>

and use it in ur extended fab - use with shapeAppearanceOverlay

<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
            style="@style/Widget.MaterialComponents.ExtendedFloatingActionButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:shapeAppearanceOverlay="@drawable/bg_circle_black"
            android:text="Sign in to setup follow page"
            android:textAlignment="center"
            app:layout_anchor="@id/scrollView"
            app:layout_anchorGravity="bottom|center|center_horizontal" />