Android 获取手机存储空间

最新推荐文章于 2023-02-24 18:00:57 发布

原创最新推荐文章于 2023-02-24 18:00:57 发布 · 7.4k 阅读

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#存储 #内存

本文介绍了如何在Android设备上获取系统的内存信息，包括可用内存、总内存、SD卡的大小及剩余空间，以及内部存储空间的方法。

1.获取可用的内存

	public String getFreeMemory(){
		ActivityManager am = (ActivityManager) context
				.getSystemService(Context.ACTIVITY_SERVICE);
		MemoryInfo mi = new MemoryInfo();
		am.getMemoryInfo(mi);
		return Formatter.formatFileSize(context, mi.availMem);
	}

2.获取总共内存

没有直接的API，但是可以读取配置文件，配置文件为/proc/meminfo,权限为可读。配置文件内容格式如下：

MemTotal: 1665632 kB
MemFree: 85140 kB
Buffers: 48808 kB
Cached: 501392 kB
SwapCached: 0 kB
Active: 937580 kB
Inactive: 244956 kB
Active(anon): 636044 kB
Inactive(anon): 596 kB
Active(file): 301536 kB
Inactive(file): 244360 kB
Unevictable: 3616 kB
Mlocked: 0 kB
HighTotal: 1309696 kB
HighFree: 14896 kB
LowTotal: 355936 kB
LowFree: 70244 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 4 kB
Writeback: 0 kB
AnonPages: 636008 kB
Mapped: 111488 kB
Shmem: 680 kB
Slab: 36564 kB
SReclaimable: 20836 kB
SUnreclaim: 15728 kB
KernelStack: 14048 kB
PageTables: 17800 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 832816 kB
Committed_AS: 11299500 kB
VmallocTotal: 122880 kB
VmallocUsed: 76444 kB
VmallocChunk: 11140 kB

很明显是键值对属性，故而：

	public String getTotalMemory() throws FileNotFoundException, IOException{
		Properties pp = new Properties();
		pp.load(new FileInputStream("/proc/meminfo"));
		return pp.getProperty("MemTotal");
	}

3.获取sd卡的大小与剩余空间

	public String getSdTotalSize(Context context){
		StatFs sf = new StatFs("/mnt/sdcard");
		long blockSize = sf.getBlockSize();
		long totalBlocks = sf.getBlockCount();
		return Formatter.formatFileSize(context, blockSize*totalBlocks);
	}
	
	public String getSdAvailableSize(Context context){
		StatFs sf = new StatFs("/mnt/sdcard");
		long blockSize = sf.getBlockSize();
		long availableBlocks = sf.getAvailableBlocks();
		return Formatter.formatFileSize(context, blockSize*availableBlocks);
	}

4.获取内部存储空间

	public String getDataTotalSize(Context context){
		StatFs sf = new StatFs(context.getCacheDir().getAbsolutePath());
		long blockSize = sf.getBlockSize();
		long totalBlocks = sf.getBlockCount();
		return Formatter.formatFileSize(context, blockSize*totalBlocks);
	}