Question

我已经了解了如何使用以下任一答案获取所有存储：with proc/mounts和with mount command，但现在我想在返回的路径上添加名称。我对内部存储没有任何问题，但这些方法无法区分SD卡和USB记忆棒。如果它看到两个驱动器连接，我怎么能确定哪一个是SD卡，哪个是USB，还是两个SD卡？还是两个USB驱动器？

Answer 1

我找到了解决方案的一部分，但是我不会再进一步了，因为它变得越来越复杂，这不是我的应用程序的主要功能。

public static class Storage extends File {

    public static final int INTERNAL_STORAGE = 1;
    public static final int SD_CARD = 2;
    public static final int USB_DRIVE = 3;

    public String name;
    public int type;

    public Storage(String path, String name, int type) {
        super(path);
        this.name = name;
        this.type = type;
    }
}

public static ArrayList<Storage> getStorages(Context context) {
    ArrayList<Storage> storages = new ArrayList<>();

    // Internal storage
    storages.add(new Storage(Environment.getExternalStorageDirectory().getPath(),
            "Internal Storage", Storage.INTERNAL_STORAGE));

    // SD Cards
    ArrayList<File> extStorages = new ArrayList<>();
    extStorages.addAll(Arrays.asList(context.getExternalFilesDirs(null)));
    extStorages.remove(0); // Remove internal storage
    String secondaryStoragePath = System.getenv("SECONDARY_STORAGE");
    for (int i = 0; i < extStorages.size(); i++) {
        String path = extStorages.get(i).getPath().split("/Android")[0];
        if (Environment.isExternalStorageRemovable(extStorages.get(i)) || secondaryStoragePath != null && secondaryStoragePath.contains(path)) {
            String name = "SD Card" + (i == 0 ? "" : " " + String.valueOf(i+1));
            storages.add(new Storage(path, name, Storage.SD_CARD));
        }
    }

    // USB Drives
    ArrayList<String> drives = new ArrayList<>();
    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 += new String(buffer);
        }
        is.close();
    } catch (final Exception e) {
        e.printStackTrace();
    }
    final String[] lines = s.split("\n");
    for (String line : lines) {
        if (!line.toLowerCase(Locale.US).contains("asec") && line.matches(reg)) {
            String[] parts = line.split(" ");
            for (String path : parts) {
                if (path.startsWith(File.separator) && !path.toLowerCase(Locale.US).contains("vold")) {
                    drives.add(path);
                }
            }
        }
    }

    // Remove SD Cards from found drives (already found)
    ArrayList<String> ids = new ArrayList<>();
    for (Storage st : storages) {
        String[] parts = st.getPath().split(File.separator);
        ids.add(parts[parts.length-1]);
    }
    for (int i = drives.size() - 1; i >= 0; i--) {
        String[] parts = drives.get(i).split(File.separator);
        String id = parts[parts.length-1];
        if (ids.contains(id)) drives.remove(i);
    }

    // Get USB Drive name
    UsbManager usbManager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
    Collection<UsbDevice> dList = usbManager.getDeviceList().values();
    ArrayList<UsbDevice> deviceList = new ArrayList<>();
    deviceList.addAll(dList);
    for (int i = 0; i < deviceList.size(); i++) {
        storages.add(new Storage(drives.get(i), deviceList.get(i).getProductName(), Storage.USB_DRIVE));
    }

    return storages;
}

查找内部存储空间
查找所有SD卡
查找所有外部驱动器，然后从中删除SD卡，因为它们已被找到。重点是将SD卡与USB设备分开。

我没有使用除了我的任何其他设备来测试它，它不可能适用于每个设备。键盘或鼠标也可能被视为连接设备，这会搞砸整个事情。

获取所有名称为android的存储和设备

1 个答案: