code: public static int getDefaultPageSize() {
          synchronized (sLock) {
              if (sDefaultPageSize == 0) {
                  try {
                      Class clazz = Class.forName("android.os.StatFs");
                      Method m = clazz.getMethod("getBlockSize");
                      Object statFsObj = clazz.getConstructor(String.class).newInstance("/data");
                      Integer value = (Integer) m.invoke(statFsObj, (Object[])null);
                      if (value != null)
                          return value.intValue();
                  } catch (Exception e) { }
              }
              if (sDefaultPageSize == 0)
                  sDefaultPageSize = 1024;
              return sDefaultPageSize;
          }
      }
docs: Gets the default page size to use when creating a database.