问题小结（7）-sd卡和/data分区使用情况检测

用来获取sd卡和系统/data分区的使用情况，包括：总的空间大小、可用空间、已用空间。

package com.schogini.dhcp;

import java.io.File;

import android.content.Context;
import android.os.Environment;
import android.os.StatFs;

public class CheckStore {
	 private static String notice;
	
     public static String checkSD(Context contect){
    	 
    	 File data=Environment.getDataDirectory();	//获得data的路径
    	 StatFs data_stat=new StatFs(data.getPath()); //创建StatFs对象
    	 long data_blockSize=data_stat.getBlockSize(); //获取block的size
    	 float data_totalBlocks=data_stat.getBlockCount();//获取block的个数
    	 int data_sizeInMb=(int)(data_blockSize*data_totalBlocks)/1024/1024;//计算总容量
    	 long data_availableBlocks=data_stat.getAvailableBlocks(); //获取可用block的个数
    	 float data_percent=(int)(data_blockSize*data_availableBlocks)/1024/1024;//计算可用容量
    	 notice="FLASH使用情况：\n总容量："+data_sizeInMb+"M.\n已用:"+(data_sizeInMb-data_percent+"\n可用:"+data_percent+"M.");
    	
    	 if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
				File filePath=Environment.getExternalStorageDirectory();    //获得sd 卡的路径
			    
				StatFs stat=new StatFs(filePath.getPath());                 //创建StatFs对象
				long blockSize=stat.getBlockSize();                         //获取block的size
				float totalBlocks=stat.getBlockCount();                     //获取block的个数
				int sizeInMb =(int)(blockSize*totalBlocks)/1024/1024;       //计算总容量
				long availableBlocks=stat.getAvailableBlocks();             //可用block的个数
				float percent=(int)(blockSize*availableBlocks)/1024/1024;              //计算可用容量
				
				notice=notice+"\nSD卡使用情况：\n总容量："+sizeInMb+"M.\n已用："+(sizeInMb-percent+"M\n可用:"+percent+"M.");
				return 	notice;	
			}
			else{
				notice=notice+"\nSD卡使用情况：未插入SD卡";	
				return notice;	
			}

     }
}