I want to use ExtendedFloatingActionButton but I don't want to apply activity wide MaterialComponent themes because I have existing buttons with custom backgrounds and icons and I'll need to modify those for material themes. I tried using MaterialComponent Bridge themes but ExtendedFloatingActionButton doesn't work with bridge theme. It's not rendered properly.
Fixed it by explicitly applying style to the ExtendedFloatingActionButton while using the bridge theme for activity.
<activity
android:name=".ui.activity.ActivityName"
android:screenOrientation="portrait"
android:theme="@style/AppThemeMaterial.NoActionBar">
while AppTheme material is
<style name="AppThemeMaterial" parent="Theme.MaterialComponents.Light.Bridge" />
You can use any of the bridge themes. Finally, applied the ExtendedFloatingActionButton theme explicitly.
<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
android:id="@+id/fab"
style="@style/Widget.MaterialComponents.ExtendedFloatingActionButton"
...
/>