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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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