luna-tracker/app/src/main/res/layout/activity_settings.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="20dp">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/settings_title"
            android:textSize="28sp"
            android:textColor="@color/accent"/>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textStyle="bold"
            android:layout_marginTop="20dp"
            android:text="@string/settings_storage"/>

        <RadioGroup
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <RadioButton android:id="@+id/settings_data_local"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="30dp"
                android:checked="true"
                android:text="@string/settings_storage_local"/>

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="30dp"
                android:text="@string/settings_storage_local_desc"/>

            <RadioButton android:id="@+id/settings_data_webdav"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="30dp"
                android:text="@string/settings_storage_dav"/>

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="30dp"
                android:text="@string/settings_storage_dav_desc"/>

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:layout_marginLeft="30dp"
                android:textStyle="bold"
                android:text="@string/settings_storage_dav_url"/>

            <EditText
                android:id="@+id/settings_data_webdav_url"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="30dp"
                android:hint="@string/settings_storage_dav_url_hint"
                android:inputType="textUri"
                android:background="@drawable/textview_background"/>

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:layout_marginLeft="30dp"
                android:textStyle="bold"
                android:text="@string/settings_storage_dav_user"/>

            <EditText
                android:id="@+id/settings_data_webdav_user"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="30dp"
                android:inputType="textEmailAddress"
                android:background="@drawable/textview_background"/>

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:layout_marginLeft="30dp"
                android:textStyle="bold"
                android:text="@string/settings_storage_dav_pass"/>

            <EditText
                android:id="@+id/settings_data_webdav_pass"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="30dp"
                android:inputType="textPassword"
                android:background="@drawable/textview_background"/>

            <com.google.android.material.progressindicator.LinearProgressIndicator
                android:id="@+id/progress_indicator"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:indeterminate="true"
                app:indicatorColor="@color/accent"
                android:layout_margin="20dp"
                android:visibility="invisible"/>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal">

                <Button
                    android:id="@+id/settings_cancel"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:layout_marginRight="20dp"
                    android:background="@drawable/button_background"
                    android:textColor="@color/accent"
                    android:text="@android:string/cancel"/>

                <Button
                    android:id="@+id/settings_save"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:textColor="@color/accent"
                    android:background="@drawable/button_background"
                    android:text="@android:string/ok"/>

            </LinearLayout>
        </RadioGroup>

    </LinearLayout>

</ScrollView>