title: set layout component to center
body: <p><img src="https://i.stack.imgur.com/TjcXp.jpg" alt="enter image description here"></p>
  
  <p>here in above screen, i have two linear layouts, one for two TextView and two EditText and other layout for Three Button as shown in figure,</p>
  
  <p>Now I want to set these two layouts as below:</p>
  
  <p>1) The first layout is required to set at the center of the screen</p>
  
  <p>2) The all buttons or second layout have to be set on the bottom of screen</p>
  
  <p>So I want to ask how i can do this.</p>
  
  <p>My XML file is</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent" 
      android:orientation="vertical"
      android:background="#000044"&gt;
      &lt;ScrollView android:id="@+id/scrollView1" android:layout_height="wrap_content" android:layout_width="match_parent"&gt;
          &lt;LinearLayout android:id="@+id/linearLayout1" android:layout_width="match_parent" android:orientation="vertical" android:layout_height="wrap_content" android:layout_gravity="center"&gt;
              &lt;TextView android:text="Login Phone" style="@style/TextStyle.Default" android:id="@+id/loginphone"&gt;&lt;/TextView&gt;
              &lt;EditText android:layout_height="wrap_content" android:id="@+id/login" android:layout_width="match_parent" android:text="" android:inputType="number" android:numeric="integer" android:phoneNumber="true"&gt;&lt;/EditText&gt;
              &lt;TextView android:text="Mobile Pin" android:id="@+id/mobilepin" style="@style/TextStyle.Default"&gt;&lt;/TextView&gt;
              &lt;EditText android:layout_height="wrap_content" android:id="@+id/pin" android:inputType="number" android:numeric="integer" android:layout_width="match_parent" android:text="" android:password="true"&gt;&lt;/EditText&gt;
          &lt;/LinearLayout&gt;
      &lt;/ScrollView&gt;
      &lt;LinearLayout android:id="@+id/linearLayout2" android:layout_height="match_parent" android:layout_gravity="bottom" android:layout_width="fill_parent" android:orientation="horizontal" android:gravity="bottom"&gt;
          &lt;Button android:id="@+id/preference" android:text="Preferences" android:layout_weight="1" android:layout_height="wrap_content" android:layout_width="fill_parent"&gt;&lt;/Button&gt;
          &lt;Button android:id="@+id/loginbutton" android:text="Login" android:layout_weight="1" android:layout_height="wrap_content" android:layout_width="fill_parent"&gt;&lt;/Button&gt;
          &lt;Button android:id="@+id/exit" android:text="Exit" android:layout_weight="1" android:layout_height="wrap_content" android:layout_width="fill_parent"&gt;&lt;/Button&gt;
      &lt;/LinearLayout&gt;    
  
  &lt;/LinearLayout&gt;
  </code></pre>