定义数组资源的xml文件位于/res/values目录下，文件名为arrays.xml
数组共有三种类型：<array></array>、<string-array></string-array>、<integer-array></integer-array>
访问方式：R.array.array_name
示例：
<?xml version="1.0" encoding="utf-8"?><resources><array name="colors"><item>@color/purple_200</item><item>@color/black</item><item>@color/teal_200</item></array><string-array name="fruits"><item>orange</item><item>apple</item><item>grape</item></string-array><integer-array name="sizes"><item>10</item><item>20</item><item>30</item></integer-array></resources>
activity中获得数组
val colors = resources.obtainTypedArray(R.array.colors)val fruits = resources.getStringArray(R.array.fruits)val sizes = resources.getIntArray(R.array.sizes)
