Magisk/app/src/main/res/layout/install_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:layout_marginTop="?attr/actionBarSize"
    android:orientation="vertical">

    <android.support.v7.widget.CardView
        android:id="@+id/install_info_card"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="4dp"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginTop="6dp"
        style="?attr/cardStyle"
        app:cardUseCompatPadding="true">

        <TextView
            android:id="@+id/install_info"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:gravity="center"
            android:padding="15dp"
            android:textStyle="bold"
            android:text="Install Magisk Version: v10" />

    </android.support.v7.widget.CardView>

    <android.support.v7.widget.CardView
        android:id="@+id/bootimage_card"
        android:layout_gravity="center"
        android:layout_width="350dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="4dp"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginTop="6dp"
        style="?attr/cardStyle"
        app:cardUseCompatPadding="true">

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginTop="15dp"
            android:layout_marginBottom="15dp">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:gravity="center"
                android:paddingBottom="10dp"
                android:text="Boot Image Location"
                android:textStyle="bold" />

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

                <Spinner
                    android:layout_width="0dp"
                    android:layout_height="match_parent"
                    android:id="@+id/block_spinner"
                    android:layout_weight="1" />

                <Button
                    android:text="Detect"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:id="@+id/detect_bootimage"/>
            </LinearLayout>

        </LinearLayout>

    </android.support.v7.widget.CardView>

    <android.support.v7.widget.CardView
        android:id="@+id/install_option_card"
        android:layout_gravity="center"
        android:layout_width="350dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="4dp"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:layout_marginTop="6dp"
        style="?attr/cardStyle"
        app:cardUseCompatPadding="true">


        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginTop="15dp"
            android:layout_marginBottom="15dp">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:gravity="center"
                android:paddingBottom="10dp"
                android:text="Advanced Settings"
                android:textStyle="bold" />

            <CheckBox
                android:text="Keep force encryption"
                android:id="@+id/keep_force_enc"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginEnd="25dp"
                android:layout_marginStart="25dp" />

            <CheckBox
                android:text="Keep dm-verity"
                android:id="@+id/keep_verity"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginEnd="25dp"
                android:layout_marginStart="25dp" />


        </LinearLayout>
    </android.support.v7.widget.CardView>

</LinearLayout>