storage size android

gistfile1.java

//internal storage
StatFs statFs = new StatFs(Environment.getRootDirectory().getAbsolutePath());        
long blockSize = statFs.getBlockSize();
long totalSize = statFs.getBlockCount()*blockSize;
long availableSize = statFs.getAvailableBlocks()*blockSize;
long freeSize = statFs.getFreeBlocks()*blockSize;

//esternal storage
StatFs statFs = new StatFs(Environment.getExternalStorageDirectory().getAbsolutePath());        
long blockSize = statFs.getBlockSize();
long totalSize = statFs.getBlockCount()*blockSize;
long availableSize = statFs.getAvailableBlocks()*blockSize;
long freeSize = statFs.getFreeBlocks()*blockSize;