安卓--存儲空間

package com.example.cunchuspace;

import java.io.File;

import android.os.Environment;
import android.os.StatFs;

public class StorageUtils {
     private static final int ERROR = -1;

     /**
      * SDCARD是否存
      */
     public static boolean externalMemoryAvailable() {
         return android.os.Environment.getExternalStorageState().equals(
                 android.os.Environment.MEDIA_MOUNTED);
     }

     /**
      * 獲取手機內部剩餘存儲空間
      * @return
      */
     public static long getAvailableInternalMemorySize() {
         File path = Environment.getDataDirectory();
         StatFs stat = new StatFs(path.getPath());
         long blockSize = stat.getBlockSize();
         long availableBlocks = stat.getAvailableBlocks();
         return availableBlocks * blockSize;
     }

     /**
      * 獲取手機內部總的存儲空間
      * @return
      */
     public static long getTotalInternalMemorySize() {
      try {
       File path = Environment.getDataDirectory();
           StatFs stat = new StatFs(path.getPath());
           long blockSize = stat.getBlockSize();
           long totalBlocks = stat.getBlockCount();
           return totalBlocks * blockSize;
   } catch (Exception e) {
    e.printStackTrace();
    return ERROR;
   }
     }

     /**
      * 獲取SDCARD剩餘存儲空間
      * @return
      */
     public static 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;
         }
     }

     /**
      * 獲取SDCARD總的存儲空間
      * @return
      */
     public static 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;
         }
     }
}

Formatter.formatFileSize()可將long轉換成帶單位的容量