UPD : The problem was solved by switching the tab with themes in AS to DeviceDefault.Light.NoActionBar
Good day. There is the following problem: when marking up items in Android Studio, the preview shows one button layout. When testing an application on a real device, the buttons are arranged differently, but the point is that only the buttons do not correspond to reality, the other elements are in order
AndroidStudio
Real device
XML Markup
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:layout_width="150dp" android:layout_height="150dp" android:id="@+id/companyLogo" android:layout_alignWithParentIfMissing="false" android:layout_alignParentEnd="false" android:layout_alignParentStart="false" android:layout_centerHorizontal="true" android:layout_alignBottom="@+id/slider" /> <ru.timuruktus.waroll.Model.ExtendedSliderLayout android:id="@+id/slider" android:layout_width="match_parent" android:layout_height="250dp" android:foreground="@drawable/top_join_alpha" android:layout_alignParentStart="false" /> <TextView android:layout_width="match_parent" android:layout_height="25dp" android:text="@string/join_email" android:id="@+id/yourEmail" android:layout_below="@+id/companyLogo" android:layout_centerHorizontal="true" android:textAlignment="center" android:textSize="20dp" android:background="#fcfcfc" /> <EditText android:layout_width="match_parent" android:layout_height="45dp" android:inputType="textEmailAddress" android:ems="10" android:id="@+id/editEmail" android:layout_below="@+id/yourEmail" android:layout_centerHorizontal="true" /> <TextView android:layout_width="match_parent" android:layout_height="25dp" android:text="@string/join_pass" android:id="@+id/yourPass" android:layout_below="@+id/editEmail" android:layout_centerHorizontal="true" android:textAlignment="center" android:textSize="20dp" android:background="#fcfcfc" /> <EditText android:layout_width="match_parent" android:layout_height="45dp" android:inputType="textPassword" android:ems="10" android:id="@+id/editPass" android:layout_below="@+id/yourPass" android:layout_centerHorizontal="true" /> <Button android:layout_width="match_parent" android:layout_height="50dp" android:text="@string/join_join" android:id="@+id/join" android:layout_below="@+id/editPass" android:layout_centerHorizontal="true" android:layout_marginLeft="100dp" android:textColor="#ffffff" android:background="@color/colorPrimary" /> <Button android:layout_width="match_parent" android:layout_height="50dp" android:text="@string/join_reg" android:id="@+id/button" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginLeft="100dp" android:background="#e3e3e3" android:layout_marginBottom="40dp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/join_forgot_pass" android:id="@+id/forgottenPass" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:textColor="@color/colorPrimaryDark" android:textStyle="bold" /> 
