floatingActionButtonを
floatingActionButton.visibility = View.INVISIBLE
のようなことをすると、
VisibilityAwareImageButton.setVisibility can only be called from within the same library group (groupId=com.android.support) less... (⌘F1) Inspection info:This API has been flagged with a restriction that has not been met. Examples of API restrictions: * Method can only be invoked by a subclass * Method can only be accessed from within the same library (defined by the Gradle library group id) * Method can only be accessed from tests. You can add your own API restrictions with the @RestrictTo annotation. Issue id: RestrictedApi
と叱られます。コード上からfloatingActionButtonの表示制御を行う場合、
floatingActionButton.show() floatingActionButton.hide()
とするようです。
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