style.xml에서 원하는 테마를 작성하신 후

AndroidManifest.xml에서 적용시키세요.

ex)

style.xml

  <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/azure</item>
        <item name="colorPrimaryDark">@color/deep_sky_blue</item>
        <item name="colorAccent">@color/azure</item>
        <item name="android:windowBackground">@color/colorWhite</item>
        <item name="android:selectableItemBackground">@drawable/pre_lollipop_selectable_item</item>
        <item name="android:screenOrientation">portrait</item>
        <item name="actionBarStyle">@style/CustomActionBar</item>
    </style>

AndroidManifest.xml
 <application
        android:name=".application.BaseApplication"
        android:allowBackup="true"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"
        android:windowSoftInputMode="stateAlwaysHidden">
    ...