I have a variation on a solution I found here
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("https://stackoverflow.com/"))
if (!part.toLowerCase(Locale.US).contains("vold"))
out.add(part);
}
}
}
}
return out;
}
The original method was tested and worked with
- Huawei X3 (stock)
- Galaxy S2 (stock)
- Galaxy S3 (stock)
I’m not certain which android version these were on when they were tested.
I’ve tested my modified version with
- Moto Xoom 4.1.2 (stock)
- Galaxy Nexus (cyanogenmod 10) using an otg cable
- HTC Incredible (cyanogenmod 7.2) this returned both the internal and external. This device is kinda an oddball in that its internal largely goes unused as getExternalStorage() returns a path to the sdcard instead.
and some single storage devices that use an sdcard as their main storage
- HTC G1 (cyanogenmod 6.1)
- HTC G1 (stock)
- HTC Vision/G2 (stock)
Excepting the Incredible all these devices only returned their removable storage. There are probably some extra checks I should be doing, but this is at least a bit better than any solution I’ve found thus far.