如何在Android应用中实现夜间模式

<&#63;xml version="1.0" encoding="utf-8"&#63;> <resources>   <attr name="colorValue" format="color" />   <attr name="floatValue" format="float" />   <attr name="integerValue" format="integer" />   <attr name="booleanValue" format="boolean" />   <attr name="dimensionValue" format="dimension" />   <attr name="stringValue" format="string" />   <attr name="referenceValue" format="color|reference" />   <attr name="imageValue" format="reference"/>    <attr name="curVisibility">   <enum name="show" value="0" />   <!-- Not displayed, but taken into account during layout (space is left for it). -->   <enum name="inshow" value="1" />   <!-- Completely hidden, as if the view had not been added. -->   <enum name="hide" value="2" />   </attr> </resources>