activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    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"
    tools:context="com.okedroid.mysimplebrowser.MainActivity">


    <WebView
        android:id="@+id/webView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="72dp"/>

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


        <EditText
            android:id="@+id/urlText"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="match_parent"
            android:ems="10"
            android:hint="Ketik URL Disini"
            android:inputType="text|textPersonName"
            android:text="http://www."/>

        <Button
            android:id="@+id/buttonGo"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBaseline="@+id/urlText"
            android:layout_alignBottom="@+id/urlText"
            android:layout_alignParentEnd="true"
            android:layout_marginEnd="16dp"
            android:onClick="goToURL"
            android:text="GO"/>

    </LinearLayout>
</RelativeLayout>