Internal phone storage in Android

How can you retr开发者_StackOverflowieve your phone internal storage from an app? I found MemoryInfo, but it seems that returns information on how much memory use your currently running tasks.

I am trying to get my app to retrieve how much internal phone storage is available.

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Use android.os.Environment to find the internal directory, then use android.os.StatFs to call the Unix statfs system call on it. Shamelessly stolen from the Android settings app:

File path = Environment.getDataDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
return Formatter.formatFileSize(this, availableBlocks * blockSize);

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I had a hard time having mine works. So I would like to share my working code to save some guys some time.
Tested on a 32GB device and 1GB device.

// Return size is in Megabytes
public class DeviceMemory {

        public static long getInternalStorageSpace()
        {
            StatFs statFs = new StatFs(Environment.getDataDirectory().getAbsolutePath());
            //StatFs statFs = new StatFs("/data");
            long total = ((long)statFs.getBlockCount() * (long)statFs.getBlockSize()) / 1048576;
            return total;
        }

        public static long getInternalFreeSpace()
        {
            StatFs statFs = new StatFs(Environment.getDataDirectory().getAbsolutePath());
            //StatFs statFs = new StatFs("/data");
            long free  = ((long)statFs.getAvailableBlocks() * (long)statFs.getBlockSize()) / 1048576;
            return free;
        }

        public static long getInternalUsedSpace()
        {
            StatFs statFs = new StatFs(Environment.getDataDirectory().getAbsolutePath());
            //StatFs statFs = new StatFs("/data");
            long total = ((long)statFs.getBlockCount() * (long)statFs.getBlockSize()) / 1048576;
            long free  = ((long)statFs.getAvailableBlocks() * (long)statFs.getBlockSize()) / 1048576;
            long busy  = total - free;
            return busy;
        }
}