File file=Environment.getExternalStorageDirectory();
long totalSpace =file.getTotalSpace();
想获取sd卡总空间大小,但是 file.getTotalSpace()这句话报错,提示以下:
Call requires API level 9 (current min is 8): java.io.File#getTotalSpace
请问,@SuppressLint("NewApi") 这句话是什么原理?