Android如何将纬度经度转换成度数格式

Question

我要转换纬度40.7127837，经度-74.0059413 并为以下格式

北纬 40°42'46.0218" 西经 74°0'21.3876"

最好的方法是什么？

我尝试了 location.FORMAT_DEGREES、location.FORMAT_MINUTES 和 location.FORMAT_SECONDS 等方法，但我不确定如何将它们转换为正确的格式。谢谢

strLongitude = location.convert(location.getLongitude(), location.FORMAT_DEGREES);
strLatitude = location.convert(location.getLatitude(), location.FORMAT_DEGREES);

Answer 1

如果您在使用内置方法时遇到问题，您可以随时创建自己的方法：

public static String getFormattedLocationInDegree(double latitude, double longitude) {
    try {
        int latSeconds = (int) Math.round(latitude * 3600);
        int latDegrees = latSeconds / 3600;
        latSeconds = Math.abs(latSeconds % 3600);
        int latMinutes = latSeconds / 60;
        latSeconds %= 60;

        int longSeconds = (int) Math.round(longitude * 3600);
        int longDegrees = longSeconds / 3600;
        longSeconds = Math.abs(longSeconds % 3600);
        int longMinutes = longSeconds / 60;
        longSeconds %= 60;
        String latDegree = latDegrees >= 0 ? "N" : "S";
        String lonDegrees = longDegrees >= 0 ? "E" : "W";

        return  Math.abs(latDegrees) + "°" + latMinutes + "'" + latSeconds
                + "\"" + latDegree +" "+ Math.abs(longDegrees) + "°" + longMinutes
                + "'" + longSeconds + "\"" + lonDegrees;
    } catch (Exception e) {
        return ""+ String.format("%8.5f", latitude) + "  "
                + String.format("%8.5f", longitude) ;
    }
}

Answer 2

您使用的 Location.convert() 方法给出了很好的结果，并且得到了很好的实施和测试。您只需要格式化输出以满足您的需要：

private String convert(double latitude, double longitude) {
    StringBuilder builder = new StringBuilder();

    if (latitude < 0) {
        builder.append("S ");
    } else {
        builder.append("N ");
    }

    String latitudeDegrees = Location.convert(Math.abs(latitude), Location.FORMAT_SECONDS);
    String[] latitudeSplit = latitudeDegrees.split(":");
    builder.append(latitudeSplit[0]);
    builder.append("°");
    builder.append(latitudeSplit[1]);
    builder.append("'");
    builder.append(latitudeSplit[2]);
    builder.append("\"");

    builder.append(" ");

    if (longitude < 0) {
        builder.append("W ");
    } else {
        builder.append("E ");
    }

    String longitudeDegrees = Location.convert(Math.abs(longitude), Location.FORMAT_SECONDS);
    String[] longitudeSplit = longitudeDegrees.split(":");
    builder.append(longitudeSplit[0]);
    builder.append("°");
    builder.append(longitudeSplit[1]);
    builder.append("'");
    builder.append(longitudeSplit[2]);
    builder.append("\"");

    return builder.toString();
}

当您使用输入坐标调用此方法时：

String locationString = convert(40.7127837, -74.0059413);

您将收到此输出：

N 40°42'46.02132" W 74°0'21.38868"

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