android - Environment.getExternalStorageDirectory().getAbsolutePath() 返回 sdcard0 但我的 SD 在 sdcard1 中

Question

我尝试使用 Environment.getExternalStorageDirectory().getAbsolutePath() 将一些东西写入 SD 卡手机内存以获取 SD 路径，结果是/storage/sdcard0。但是我的SD卡是/storage/sdcard1。如何获取真实的SD卡路径？

我可以在“/”中看到有一个名为/ext_sd 的符号链接(symbolic link)链接到/storage/sdcard1。此符号链接(symbolic link)在所有设备中？

Answer 1

我在这篇文章中找到了解决方案:How can I get external SD card path for Android 4.0+?

/**
 * Returns the list of external devices mounted.
 * 
 * @return HashSet<String>.
 */
public static HashSet<String> getExternalMounts() {
    final HashSet<String> out = new HashSet<String>();
    String reg = "(?i).*vold.*(vfat|ntfs|exfat|fat32|ext3|ext4).*rw.*";
    String s = "";
    try {
        final Process process = new ProcessBuilder().command("mount")
                .redirectErrorStream(true).start();
        process.waitFor();
        final InputStream is = process.getInputStream();
        final byte[] buffer = new byte[1024];
        while (is.read(buffer) != -1) {
            s = s + new String(buffer);
        }
        is.close();
    } catch (final Exception e) {
        e.printStackTrace();
    }

    // parse output
    final String[] lines = s.split("\n");
    for (String line : lines) {
        if (!line.toLowerCase(Locale.US).contains("asec")) {
            if (line.matches(reg)) {
                String[] parts = line.split(" ");
                for (String part : parts) {
                    if (part.startsWith("/"))
                        if (!part.toLowerCase(Locale.US).contains("vold"))
                            out.add(part);
                }
            }
        }
    }
    return out;
}