Question

How to achieve these two scenarios in android layout –

Answer 1

You can add padding to the left and right if you want to separate them from the border.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Button1"
    android:id="@+id/Button1"
    android:layout_alignParentRight="true"
    />
<Button  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Button2"
    android:id="@+id/Button2"
    android:layout_alignParentLeft="true"
    />
<Button  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Button3"
    android:id="@+id/Button3"
    android:layout_below="@id/Button2"
    android:layout_centerHorizontal="true"
    />
<Button  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Button4"
    android:id="@+id/Button4"
    android:layout_below="@id/Button3"
    android:layout_centerHorizontal="true"
    />
<Button  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Button5"
    android:id="@+id/Button5"
    android:layout_alignParentRight="true"
    android:layout_below="@id/Button4"
    />
<Button  
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Button6"
    android:id="@+id/Button6"
    android:layout_alignParentLeft="true"
    android:layout_below="@id/Button4"
    />
</RelativeLayout>