title: Android Layout Adjustment
body: <p>Here is screen shoot of my mobile app. How can i adjust button "Manage Category" in center at the bottom because this black space at bottom not seems good.</p>
  
  <p><img src="https://i.stack.imgur.com/h5rUq.jpg" alt="enter image description here"></p>
  
  <p>Here is my layout file.</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/layout_root"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      android:orientation="vertical" &gt;
  
      &lt;ListView
          android:id="@+id/listCategory"
          android:layout_width="fill_parent"
          android:layout_height="0dip"
          android:layout_weight="0.9"
          android:background="#FFFFFF"
          android:gravity="top" /&gt;
  
      &lt;Button
          android:id="@+id/btnManageCategory"
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"
          android:onClick="onButtonClick"
          android:text="Manage Category" 
          android:gravity="center"
          /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>