关于安卓开发时获取sd卡状态

 首先要在AndroidManifest.xml中增加SD卡访问权限 

判断SD卡是否存在privateboolean ExistSDCard() 

{ if (android.os.Environment.getExternalStorageState().

equals( android.os.Environment.MEDIA_MOUNTED)) { 

returntrue; } elsereturnfalse; } 

查看SD卡的剩余空间publiclong getSDFreeSize(

){ //取得SD卡文件路径 File path = Environment.

getExternalStorageDirectory(); StatFs sf = ne

w StatFs(path.getPath()); //获取单个数据块的大小(Byte) 

long blockSize = sf.getBlockSize(); //空闲的数据块的数量 

long freeBlocks = sf.getAvailableBlocks();

 //返回SD卡空闲大小 //return freeBlocks * blockSize;

 //单位Byte //return (freeBlocks * blockSize)/1024; 

//单位KB return (freeBlocks * blockSize)/1024 /1024; //单位MB } 

查看SD卡总容量publiclong getSDAllSize(){ //取得SD卡文件路径

File path = Environment.getExternalStorageDirectory();

 StatFs sf = new StatFs(path.getPath()); //获取单个数据块的大小(Byte)

long blockSize = sf.getBlockSize(); //获取所有数据块数long allBlocks = sf.getBlockCount(); 

//返回SD卡大小 //return allBlocks * blockSize; //单位Byte //return (allBlocks * blockSize)/1024;

 //单位KBreturn (allBlocks * blockSize)/1024/1024; //单位MB