一开始没找到合适的方法，后来看到系统通知栏中直接显示了对应类型，

找到对应代码但在普通app中用不了，那只能上反射大法了

public class SDCardUtil{private static String TAG = "SDCardUtil";public static HashMap getStorageType(Context pContext) {HashMap<String,String> map = new HashMap<>();map.clear();StringBuffer buffer = new StringBuffer();final StorageManager storageManager = (StorageManager) pContext.getSystemService(Context.STORAGE_SERVICE);try {//获取类型是U盘还是SD卡final Method getVolumes = storageManager.getClass().getMethod("getVolumes");final List<Object> invokeVolumes = (List<Object>) getVolumes.invoke(storageManager);final Class<?> volumeInfoClazz = Class.forName("android.os.storage.VolumeInfo");final Method getPath = volumeInfoClazz.getMethod("getPath");final Method getDisk = volumeInfoClazz.getMethod("getDisk");final Class<?> diskInfoClazz = Class.forName("android.os.storage.DiskInfo");final Method getDescription = diskInfoClazz.getMethod("getDescription");for (int i = 0; i < invokeVolumes.size(); i++) {final Object volumeInfo = invokeVolumes.get(i);File invokePath = (File) getPath.invoke(volumeInfo);Log.e(TAG, "invokePath:"+invokePath.getPath());if ("/data".equals(invokePath.getPath()) || "/storage/emulated".equals(invokePath.getPath())) continue;Object invokeDiskInfo = getDisk.invoke(volumeInfo);String description = (String)getDescription.invoke(invokeDiskInfo);Log.e(TAG, "getDescription:"+description);map.put(invokePath.getPath(), description);}return map;}
}