java 将布尔对象数组覆盖为布尔基本数组？
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Coverting a Boolean object array to boolean primitive array?
提问by Kaiesh
I have an ArrayList of type Boolean that requires to be manipulated as a boolean[] as I am trying to use:
我有一个 Boolean 类型的 ArrayList 需要在我尝试使用时将其作为 boolean[] 进行操作：
AlertDialog builder;
builder.setMultiChoiceItems(items, checkedItems, new DialogInterface.OnMultiChoiceClickListener() { ... });
However, while I can create a Boolean object array, I cannot find an efficient way to covert this object array to a primitive array that the builder function calls for (the only method I can come up with is to iterate over the Object array and build a new primitive array).
但是，虽然我可以创建一个 Boolean 对象数组，但我找不到一种有效的方法来将此对象数组转换为 builder 函数调用的原始数组（我能想到的唯一方法是遍历 Object 数组并构建一个新的原始数组）。
I am retrieving my Object array from the ArrayList as follows:
我正在从 ArrayList 检索我的 Object 数组，如下所示：
final Boolean[] checkedItems = getBoolList().toArray(new Boolean[getBoolList().size()]);
Is there something I can do with my ArrayList? Or is there an obvious casting/conversion method that I am missing??
我可以用我的 ArrayList 做些什么吗？还是我缺少明显的转换/转换方法？
Any help appreciated!
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回答by edwardsmatt
You aren't missing anything, the only way to do it is to Iterate over the list I'm afraid
你没有遗漏任何东西，唯一的方法就是遍历列表恐怕
An (Untested) Example:
一个（未经测试的）示例：
private boolean[] toPrimitiveArray(final List<Boolean> booleanList) {
final boolean[] primitives = new boolean[booleanList.size()];
int index = 0;
for (Boolean object : booleanList) {
primitives[index++] = object;
}
return primitives;
}
Edit (as per Stephen C's comment): Or you can use a third party util such as Apache Commons ArrayUtils:
编辑（根据 Stephen C 的评论）：或者您可以使用第三方工具，例如 Apache Commons ArrayUtils：
http://commons.apache.org/lang/api-2.5/org/apache/commons/lang/ArrayUtils.html
http://commons.apache.org/lang/api-2.5/org/apache/commons/lang/ArrayUtils.html
