public static List<HomeDirBean> getAllExternalStorage(Context context) {
  List<HomeDirBean> storagePath = new ArrayList<>();
  StorageManager storageManager = (StorageManager) context.getSystemService(STORAGE_SERVICE);
  StorageVolume[] storageVolumes;
  try {
   Method getVolumeList = StorageManager.class.getDeclaredMethod("getVolumeList");
   storageVolumes = (StorageVolume[]) getVolumeList.invoke(storageManager);
   Method getVolumeState = StorageManager.class.getDeclaredMethod("getVolumeState", String.class);
   for (StorageVolume storageVolume : storageVolumes) {
    String desc = storageVolume.getDescription(context);
    Log.i(TAG, "storageVolume name--->" + desc);
    Method getPath = StorageVolume.class.getMethod("getPath");
    String path = (String) getPath.invoke(storageVolume);
    Log.i(TAG, "StoragePath--->" + path);
    //這里需要用StorageManager反射調(diào)用getVolumeState函數(shù)，而不應(yīng)該用StorageVolume的getState方法，因為可能會報錯
    String state = (String) getVolumeState.invoke(storageManager, path);
    Log.i(TAG, "storageVolume State--->" + state);
    if (Environment.MEDIA_MOUNTED.equals(state)) {
     HomeDirBean bean = new HomeDirBean(path, desc);
     storagePath.add(bean);
    }
   }
  } catch (Exception e) {
   Log.e(TAG, e.getMessage());
  }
  return storagePath;
 }