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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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