查询存储空间的代码

以下代码片段转载自Android Snippets

该代码片段可以让我们获取internal和external的存储空间大小。

   1. import java.io.File;  
   2.   
   3. import android.os.Environment;  
   4. import android.os.StatFs;  
   5.   
   6. public class MemoryStatus {  
   7.   
   8.     static final int ERROR = -1;  
   9.       
  10.     static public boolean externalMemoryAvailable() {  
  11.         return android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);  
  12.     }  
  13.       
  14.     static public long getAvailableInternalMemorySize() {  
  15.         File path = Environment.getDataDirectory();  
  16.         StatFs stat = new StatFs(path.getPath());  
  17.         long blockSize = stat.getBlockSize();  
  18.         long availableBlocks = stat.getAvailableBlocks();  
  19.         return availableBlocks * blockSize;  
  20.     }  
  21.       
  22.     static public long getTotalInternalMemorySize() {  
  23.         File path = Environment.getDataDirectory();  
  24.         StatFs stat = new StatFs(path.getPath());  
  25.         long blockSize = stat.getBlockSize();  
  26.         long totalBlocks = stat.getBlockCount();  
  27.         return totalBlocks * blockSize;  
  28.     }  
  29.       
  30.     static public long getAvailableExternalMemorySize() {  
  31.         if(externalMemoryAvailable()) {  
  32.             File path = Environment.getExternalStorageDirectory();  
  33.             StatFs stat = new StatFs(path.getPath());  
  34.             long blockSize = stat.getBlockSize();  
  35.             long availableBlocks = stat.getAvailableBlocks();  
  36.             return availableBlocks * blockSize;  
  37.         } else {  
  38.             return ERROR;  
  39.         }  
  40.     }  
  41.       
  42.     static public long getTotalExternalMemorySize() {  
  43.         if(externalMemoryAvailable()) {  
  44.             File path = Environment.getExternalStorageDirectory();  
  45.             StatFs stat = new StatFs(path.getPath());  
  46.             long blockSize = stat.getBlockSize();  
  47.             long totalBlocks = stat.getBlockCount();  
  48.             return totalBlocks * blockSize;  
  49.         } else {  
  50.             return ERROR;  
  51.         }  
  52.     }  
  53.       
  54.     static public String formatSize(long size) {  
  55.         String suffix = null;  
  56.       
  57.         if (size >= 1024) {  
  58.             suffix = "KiB";  
  59.             size /= 1024;  
  60.             if (size >= 1024) {  
  61.                 suffix = "MiB";  
  62.                 size /= 1024;  
  63.             }  
  64.         }  
  65.       
  66.         StringBuilder resultBuffer = new StringBuilder(Long.toString(size));  
  67.       
  68.         int commaOffset = resultBuffer.length() - 3;  
  69.         while (commaOffset > 0) {  
  70.             resultBuffer.insert(commaOffset, ',');  
  71.             commaOffset -= 3;  
  72.         }  
  73.       
  74.         if (suffix != null)  
  75.             resultBuffer.append(suffix);  
  76.         return resultBuffer.toString();  
  77.     }  
  78. }