How to get actual size of mounted SD card in Android?

Question

I\'m trying to find a way to find the total size and free space of a mounted SD card on a phone, from my research on SOF and on the Android devs site I was able to find the

Answer 1

public String[] getSize() throws IOException {
    String memory="";
    Process p = Runtime.getRuntime().exec("df /mnt/sdcard");
    InputStream is =p.getInputStream();
    int by=-1;
    while((by=is.read())!=-1) {
        memory+=new String(new byte[]{(byte)by});
    }
    for (String df:memory.split("/n")) {
        if(df.startsWith("/mnt/sdcard")) {
            String[] par = df.split(" ");
            List pp=new ArrayList();
            for(String pa:par) {
                if(!pa.isEmpty()) {
                    pp.add(pa);
                }
            }
            return pp.toArray(new String[pp.size()]);

        }
    }
    return null;
}

getSize()[0] is /mnt/sdcard. getSize()[1] is size of sd (example 12.0G), getSize()[2] is used, [3] is free, [4] is blksize

Or:

new File("/sdcard/").getFreeSpace() - bytes of free in long
new File("/sdcard/").getTotalSpace() - size of sd