AndroidAPS/app/src/main/res/layout/activity_preferences.xml

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

    <com.google.android.material.textfield.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="@string/filter"
        app:endIconMode="clear_text">

        <com.google.android.material.textfield.TextInputEditText
            android:id="@+id/pref_filter"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginStart="10dp"
            android:layout_marginEnd="10dp"
            android:layout_gravity="center_vertical"
            android:layout_weight="1"
            android:autofillHints="@string/filter"
            android:gravity="start"
            android:textStyle="bold"
            android:inputType="text"
            android:background="@color/transparent"/>

    </com.google.android.material.textfield.TextInputLayout>

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">

        <FrameLayout
            android:id="@+id/frame_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

    </ScrollView>

</LinearLayout>