title: change background color of Preference
body: <p>I have a <code>PreferenceCategory</code>, xml file and I have defined all preferences in it, I call this from class that extends <code>PreferenceActivity</code>. I am unable to set the background of my settings screen, this screen is displayed with help of xml file shown below. Please see that I have already defined the <code>android:background="#041A37"</code>, still the screen remains default color: black.</p>
  
  <pre><code>public class MyPreferenceActivity extends PreferenceActivity {
      @Override
      public void onCreate(Bundle savedInstanceState) {
          Context mContext=super.getBaseContext();
          super.onCreate(savedInstanceState);
          addPreferencesFromResource(R.layout.preference);
          //v.setBackgroundColor(Color.rgb(4, 26, 55));
      }
  }
  </code></pre>
  
  <hr>
  
  <p>preference.xml is </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
      android:background="#041A37" &gt;
  
      &lt;PreferenceCategory&gt;
          &lt;com.dropcall.SeekBarPreference
              android:background="#041A37"
              android:defaultValue="5"
              android:key="@string/Interference_Delay"
              android:progressDrawable="@drawable/seekbardrawable"
              android:title="Seconds Delay until intereference" /&gt;
  
          &lt;com.dropcall.SeekBarPreference2
              android:defaultValue="30"
              android:key="@string/Drop_Delay"
              android:progressDrawable="@drawable/seekbardrawable"
              android:title="Seconds delay until drop" /&gt;
  
          &lt;CheckBoxPreference
              android:background="@drawable/state_normal"
              android:defaultValue="true"
              android:key="@string/Drop_Option"
              android:title="Close after call drop" /&gt;
          &lt;CheckBoxPreference
              android:background="@drawable/state_normal"
              android:defaultValue="true"
              android:key="@string/Timer_Option"
              android:title="Start timers on launch" /&gt;
      &lt;/PreferenceCategory&gt;
  
  &lt;/PreferenceScreen&gt;
  </code></pre>
  
  <hr>
  
  <p>Although I have set <code>android:background="#041A37"</code> in every file, the background doesn't turn into navy blue, or any other color for that matter. It remains default color, black. How to change the background color. Please let me know any pointers / hints , if you had faced same issue let me know what changes you made to set the background color.</p>