4. 获取手机的存储大小：
- public static long getRealSizeOnPhone() { File path = Environment.getDataDirectory();
- StatFs stat = new StatFs(path.getPath()); long blockSize = stat.getBlockSize();
- long availableBlocks = stat.getAvailableBlocks(); long realSize = blockSize * availableBlocks;
- return realSize; }
---->检测手机存储是否有足够的空间：
- /** * @param updateSize 指定的检测空间大小
- * @return 空间足够返回true,不足返回false */
