hoge.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:layout_width="fill_parent" android:layout_height="wrap_content">

	<EditText android:layout_height="wrap_content"
		android:layout_width="fill_parent" android:id="@+id/url" android:hint="@string/hint_url"
		android:maxLines="3" android:layout_alignParentTop="true" />
	<EditText android:layout_width="fill_parent" android:id="@+id/body"
		android:hint="@string/hint_body" android:inputType="textMultiLine"
		android:gravity="top" android:layout_below="@+id/url"
		android:layout_height="fill_parent" android:layout_above="@+id/post" />
	<Button android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:width="140dip"
		android:text="@string/post" android:id="@+id/post"
		android:layout_alignParentBottom="true"
		android:layout_alignParentRight="true" />
</RelativeLayout>