参考
Android 获取设备运行内存信息
https://blog.csdn.net/b1tb1t/article/details/131290808

Android 获取设备外存

	// 全部外存, 和手机标称不一样public static long getTotalStorage() {File path = Environment.getExternalStorageDirectory();StatFs stat = new StatFs(path.getPath());long blockSize = stat.getBlockSizeLong();long totalBlocks = stat.getBlockCountLong();return totalBlocks * blockSize;}// 可用外存public static long getAvailableStorage() {File path = Environment.getExternalStorageDirectory();StatFs stat = new StatFs(path.getPath());long blockSize = stat.getBlockSizeLong();long availableBlocks = stat.getAvailableBlocksLong();return availableBlocks * blockSize;}