Linearlayout

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.rootkit33.belajarandroid.MainActivity">


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

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Simpan"/>

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Batal"/>


    </LinearLayout>

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

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Simpan"
            android:layout_weight="1"/>

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Batal"
            android:layout_weight="1"/>


    </LinearLayout>

</LinearLayout>