activity_main,xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.dicoding.associate.barvolume.MainActivity">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Panjang"
        android:layout_marginBottom="@dimen/activity_vertical_margin"/>
    <EditText
        android:id="@+id/edt_length"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal"
        android:lines="1"
        android:layout_marginBottom="@dimen/activity_vertical_margin"/>
    <TextView
        android:layout_width="match_parent"
        android:llayout_height="wrap_content"
        android:text="Lebar"
        android:layout_marginBottom="@dimen/activity_vertical_margin"/>
    <EditText
        android:id="@+id/edt_width"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal"
        android:lines="1"
        android:layout_marginBottom="@dimen/activity_vertical_margin"/>
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Tinggi"
        android:layout_marginBottom="@dimen/activity_vertical_margin"/>
    <EditText
        android:id="@+id/edt_height"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="numberDecimal"
        android:lines="1"/>
    <Button
        android:id="@+id/btn_calculate"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Hitung"
        android:layout_marginBottom="@dimen/activity_vertical_margin"/>
    <TextView
        android:id="@+id/tv_result"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Hasil"
        android:gravity="center"
        android:textSize="24sp"
        android:textStyle="bold"
        android:layout_marginBottom="@dimen/activity_vertical_margin"/>
 
</LinearLayout>