实现日夜间转换获取数据上下刷新(values-styles.xml)

<resources>    <!-- Base application theme. -->    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">        <!-- Customize your theme here. -->        <item name="colorPrimary">@color/colorPrimary</item>        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>        <item name="colorAccent">@color/colorAccent</item>        <item name="mainbackgroud">@android:color/white</item>        <item name="textcontext">@string/changetoday</item>        <item name="android:textColor">@android:color/black</item>        <item name="android:drawable">@mipmap/adh</item>    </style>    <style name="NightAppTheme" parent="Theme.AppCompat.Light.DarkActionBar">        <!-- Customize your theme here. -->        <item name="colorPrimary">@color/colorPrimary</item>        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>        <item name="colorAccent">@color/nightColorAccent</item>        <item name="mainbackgroud">@android:color/black</item>        <item name="textcontext">@string/changetonight</item>        <item name="android:textColor">@android:color/white</item>        <item name="android:drawable">@mipmap/aap</item>    </style></resources>