SDCardUtils.java 文件源码

private static String getStorageVolumeStats(Object service, Object storageVolume, String path) {
    try {
        Class<? extends Object> StorageVolumeClass = storageVolume.getClass();
        Method getState = StorageVolumeClass.getMethod("getState");
        return (String) getState.invoke(storageVolume);
    } catch (Exception e) {
        try {
            Class IMountService = service.getClass();
            Method getVolumeState = IMountService.getMethod("getVolumeState", String.class);
            return (String) getVolumeState.invoke(service, path);
        } catch (Exception e1) {
            e1.printStackTrace();
        }
    }
    return Environment.MEDIA_UNMOUNTABLE;
}