Android Sdcard 可用空间大小

/**

* 获取sdcard使用状况

*/

private void setSdcardInfo(){

if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){

File filePath = Environment.getExternalStorageDirectory();    //得到sd卡的路径

StatFs stat=new StatFs(filePath.getPath());                 //建立StatFs对象

long blockSize=stat.getBlockSize();                         //获取block的size

float totalBlocks=stat.getBlockCount();                     //获取block的总数

float totalGbSize = (blockSize*totalBlocks)/1024/1024/1024;

DecimalFormat df = new DecimalFormat(“#0.0″);

String totalGbSizeStr = df.format(totalGbSize);            //总共大小

long availableBlocks=stat.getAvailableBlocks();             //获取可用块大小

String usedTotalGbSizeStr = df.format((totalBlocks – availableBlocks) * blockSize /1024/1024/1024);//已用大小

System.out.println(“存储空间”+totalGbSizeStr+”G,已用”+usedTotalGbSizeStr+”G”);

}

else{

Toast.makeText(this,”SD卡不存在”,Toast.LENGTH_LONG).show();

}

}