Memory Size Class for viewing available storage

最新推荐文章于 2024-07-02 20:30:52 发布

转载最新推荐文章于 2024-07-02 20:30:52 发布 · 609 阅读

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本文提供了一个用于查看Android设备内部及外部存储可用空间和总空间的类。通过使用Java IO、Android OS等API，该类能够判断外部存储是否可用，并获取内部和外部存储的具体容量。

Class used to view available and total storage for internal and external memory. Also does pretty formatting.

import java.io.File; import android.os.Environment; import android.os.StatFs; public class MemoryStatus { static final int ERROR = -1; static public boolean externalMemoryAvailable() { return android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED); } 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; } 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; } 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; } } 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(); } }

原文：http://www.androidsnippets.org/snippets/48/