Relative Layout

Screen 1

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

  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/button1"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:layout_alignParentTop="true"

      android:layout_marginLeft="20dp"

      android:text="android:layout_alignParentTop"/>

      <Button

      android:id="@+id/button2"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:layout_alignParentBottom="true"

      android:layout_marginLeft="20dp"

      android:text="android:layout_alignParentBottom"/>

   

</RelativeLayout>

Screen 2

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

  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/button1"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:layout_alignParentLeft="true"

      android:layout_marginLeft="20dp"

      android:text="android:layout_alignParentLeft"/>

   

</RelativeLayout>

Screen 3

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

  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/button1"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:layout_alignParentRight="true"

      android:text="android:layout_alignParentRight"/>

   

</RelativeLayout>

Screen 4

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

  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/button1"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:layout_centerHorizontal="true"

      android:text="android:layout_centerHorizontal"/>

      <Button

      android:id="@+id/button2"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:layout_centerVertical="true"

      android:text="android:layout_centerVertical"/>

   

</RelativeLayout>

Screen 5

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

  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/button1"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:layout_centerInParent="true"

      android:text="android:layout_centerInParen"/>

   

</RelativeLayout>

Screen 6

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

  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/button2"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:text="Button2"/>

      <Button

      android:id="@+id/button1"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:text="Button1 is below button2"

      android:layout_below="@+id/button2"/>

      <Button

      android:id="@+id/button3"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:text="Button3 below button1"

      android:layout_below="@+id/button1"/>

</RelativeLayout>

Screen 7

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

  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/button2"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:text="Button2"/>

      <Button

      android:id="@+id/button1"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:text="Button1 is to the right of button2"

      android:layout_toRightOf="@+id/button2"/>

   

</RelativeLayout>

Screen 8

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

  xmlns:android="http://schemas.android.com/apk/res/android"

  android:orientation="vertical"

  android:gravity="center"

  android:layout_width="match_parent"

  android:layout_height="match_parent">

  <Button

      android:id="@+id/button2"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:text="Button2"/>

      <Button

      android:id="@+id/button1"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content"

      android:text="Button1 is to the right of button2"

      android:layout_toRightOf="@+id/button2"

      android:layout_alignTop="@+id/button2"

      android:layout_alignBottom="@+id/button2"/>

   

   

</RelativeLayout>