Android中StatFs获取系统/sdcard存储(剩余空间)大小

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package com.orgcent.util;   import java.io.File;   import android.os.Environment; import android.os.StatFs;   public class MemoryStatus {     static final int ERROR = -1;       /**      * 外部存储是否可用      * @return      */     static public boolean externalMemoryAvailable() {         return android.os.Environment.getExternalStorageState().equals(                 android.os.Environment.MEDIA_MOUNTED);     }       /**      * 获取手机内部可用空间大小      * @return      */     static public long getAvailableInternalMemorySize() {         File path = Environment.getDataDirectory();         StatFs stat = new StatFs(path.getPath());         long blockSize = stat.getBlockSize();         long availableBlocks = stat.getAvailableBlocks();         return availableBlocks * blockSize;     }       /**      * 获取手机内部空间大小      * @return      */     static public long getTotalInternalMemorySize() {         File path = Environment.getDataDirectory();         StatFs stat = new StatFs(path.getPath());         long blockSize = stat.getBlockSize();         long totalBlocks = stat.getBlockCount();         return totalBlocks * blockSize;     }       /**      * 获取手机外部可用空间大小      * @return      */     static public long getAvailableExternalMemorySize() {         if (externalMemoryAvailable()) {             File path = Environment.getExternalStorageDirectory();             StatFs stat = new StatFs(path.getPath());             long blockSize = stat.getBlockSize();             long availableBlocks = stat.getAvailableBlocks();             return availableBlocks * blockSize;         } else {             return ERROR;         }     }       /**      * 获取手机外部空间大小      * @return      */     static public long getTotalExternalMemorySize() {         if (externalMemoryAvailable()) {             File path = Environment.getExternalStorageDirectory();             StatFs stat = new StatFs(path.getPath());             long blockSize = stat.getBlockSize();             long totalBlocks = stat.getBlockCount();             return totalBlocks * blockSize;         } else {             return ERROR;         }     }       static public String formatSize(long size) {         String suffix = null;           if (size >= 1024) {             suffix = "KiB";             size /= 1024;             if (size >= 1024) {                 suffix = "MiB";                 size /= 1024;             }         }           StringBuilder resultBuffer = new StringBuilder(Long.toString(size));         int commaOffset = resultBuffer.length() - 3;         while (commaOffset > 0) {             resultBuffer.insert(commaOffset, ',');             commaOffset -= 3;         }           if (suffix != null)             resultBuffer.append(suffix);         return resultBuffer.toString();     } }

在存储文件时，为了保证有充足的剩余空间大小，通常需要知道系统内部或者sdcard的存储大小。上面是一个获取存储空间的工具类。

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