simple-xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/main_root"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.wisnu.uicomponent.MainActivity">

    <EditText
        android:id="@+id/name_edt"
        android:hint="Name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/say_hello_btn"
        android:text="Say Hello"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>