//StorageUtils.java
public static ArrayList<Storage> getAllMountedStorage() {
    Process process = null;
    ArrayList<Storage> list = null;
    try {
        Runtime rt = Runtime.getRuntime();

        process = rt.exec("mount");
        InputStream is = process.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        String line;
        while ((line = reader.readLine()) != null) {
            String[] strs = line.split(" ");
            String path = strs[1];
            File file = new File(path);
            if (file.isDirectory() && file.canRead() && file.canWrite()) {
                if (path.endsWith("legacy")) {
                    continue;
                }
                Storage storage = new Storage();
                storage.setFreeLenth(file.getUsableSpace());
                storage.setTotalLength(file.getTotalSpace());
                storage.setPath(path);
                if (list == null) {
                    list = new ArrayList<Storage>();
                    list.add(storage);
                } else {
                    list.add(storage);
                }
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {

        if (process != null) {
            try {
                process.getErrorStream().close();
                process.getInputStream().close();
                process.getOutputStream().close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return list;
}