Linear Layout

Linear Layout organizes elements along a single line. You specify whether that line is vertical or horizontal using android:orientation. Here is a sample Layout XML using Linear Layout. Change Orientation horizontal if you want to adjust widgets horizontally.

<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="match_parent"
 android:layout_height="match_parent">

 <Button
 android:id="@+id/backbutton"
 android:text="Back"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />

<TextView
 android:text="First Name"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content" />

<EditText
 android:width="100px"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:text="Last Name"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

 <EditText
android:width="100px"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

</LinearLayout>

Relative Layout

 RelativeLayout lays out elements based on their relationships with one another, and with the parent container. This is arguably the most complicated layout, and we need several properties to actually get the layout we want.

<RelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:paddingLeft="16dp"
 android:paddingRight="16dp" >

 <EditText
android:id="@+id/name"
 android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/reminder" />
 
<Spinner
 android:id="@+id/dates"
 android:layout_width="0dp"
 android:layout_height="wrap_content"
 android:layout_below="@id/name"
 android:layout_alignParentLeft="true"
android:layout_toLeftOf="@+id/times" />

<Spinner
android:id="@id/times"
android:layout_width="96dp"
android:layout_height="wrap_content"
android:layout_below="@id/name"
android:layout_alignParentRight="true" />

<Button
android:layout_width="96dp"
android:layout_height="wrap_content"
android:layout_below="@id/times"
android:layout_alignParentRight="true"
android:text="@string/done" />

</RelativeLayout>