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>