从array.xml文件获取字符串列表并将它们解析为浮点数组android时遇到问题

Question

从数组文件中获取字符串并将它们解析为浮点数数组。运行代码后，我得到一个空指针异常，但数组不为空。帮助... OnCreate方法里面的代码：

    String[] lat = getResources().getStringArray(R.array.latitudes);

    List<Float> latitudes = new ArrayList<>();
        for (String l : lat) {
            latitudes.add(Float.parseFloat(l));
        }

array.xml 文件中的代码：

<?xml version="1.0" encoding="utf-8"?>
<resources>

<array name="latitudes">
    <item >51.885375</item><!-- CIT Main Campus -->
    <item >51.884774</item><!-- Library -->
    <item >51.884966</item><!-- Nexus Student Centre -->
    <item >51.885651</item><!-- Admin Office -->
    <item >51.883761</item><!-- Canteen -->
    <item >51.884694</item><!-- Stadium -->
    <item >51.884721</item><!-- Gym -->
    <item >51.884642</item><!-- Car Park -->
    <item >51.886531</item><!-- Melbourne Exam Hall -->
    <item >51.895137</item><!-- CIT Crawford College of Art and Design -->
    <item >51.896025</item><!-- CIT Cork School Of Music -->
</array>

<array name="longitudes">
    <item >-8.534452</item><!-- CIT Main Campus -->
    <item >-8.534278</item><!-- Library -->
    <item >-8.535195</item><!-- Nexus Student Centre -->
    <item >-8.533758</item><!-- Admin Office -->
    <item >-8.533522</item><!-- Canteen -->
    <item >-8.537159</item><!-- Stadium -->
    <item >-8.534777</item><!-- Gym -->
    <item >-8.538809</item><!-- Car Park -->
    <item >-8.533832</item><!-- Melbourne Exam Hall -->
    <item >-8.481826</item><!-- CIT Crawford College of Art and Design -->
    <item >-8.468063</item><!-- CIT Cork School Of Music -->
</array>

</resources>

Answer 1

尝试使用 string-array 而不是 array