您可以创建一个可绘制对象并将其设置为微调器的背景。例如创建一个可绘制对象,如:drop_down_design.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape>
<solid android:color="@android:color/transparent"
/>
<stroke
android:width="1dp"
android:color="@color/colorPrimaryDark" />
<padding
android:left="@dimen/padding_12"
android:top="@dimen/padding_12"
android:right="@dimen/padding_12"
android:bottom="@dimen/padding_12" >
</padding>
<corners
android:radius="@dimen/radius_2" >
</corners>
</shape>
</item>
<item>
<bitmap
android:gravity="end"
android:src="@drawable/ic_arrow_drop_down" /> // down arrow image
</item>
</layer-list>
然后将其设置为您的微调框,例如:
android:background="@drawable/drop_down_design"
希望这会有所帮助.....