Android獲得sdcard大小及使用情況信息

public static class SDCardInfo {
    public long total;


public long free;

}
public static SDCardInfo getSDCardInfo() {
    String sDcString = android.os.Environment.getExternalStorageState();

if (sDcString.equals(android.os.Environment.MEDIA_MOUNTED)) {
    File pathFile = android.os.Environment.getExternalStorageDirectory();

    try {
        android.os.StatFs statfs = new android.os.StatFs(pathFile.getPath());

        // 獲取SDCard上BLOCK總數
        long nTotalBlocks = statfs.getBlockCount();

        // 獲取SDCard上每個block的SIZE
        long nBlocSize = statfs.getBlockSize();

        // 獲取可供程序使用的Block的數量
        long nAvailaBlock = statfs.getAvailableBlocks();

        // 獲取剩下的所有Block的數量(包括預留的一般程序無法使用的塊)
        long nFreeBlock = statfs.getFreeBlocks();

        SDCardInfo info = new SDCardInfo();
        // 計算SDCard 總容量大小MB
        info.total = nTotalBlocks * nBlocSize;

        // 計算 SDCard 剩余大小MB
        info.free = nAvailaBlock * nBlocSize;

        return info;
    } catch (IllegalArgumentException e) {
        Log.e(LOG_TAG, e.toString());
    }
}

return null;

}</pre>