title: SQLite database to data class
body: <p>I want to create an application.<br>
  My app is a book and I created a SQLite database for my data as "mybook.db" that is 3.5 MB in size.<br>
  I tested my app and all activity works good!<br>
  Now I want to publish it on the Play store.</p>
  
  <p>I used <code>In App Billing</code> for selling my content to premium users, but I realized that my database is available on "<code>./data/data/myapp/database</code>"
  and also in the asset folder of apk package, and anyone can copy and use it! :(</p>
  
  <p>Now what I can do to save my data?<br>
  is it possible to convert sqlite to android class?<br>
  is it possible to encode data?<br>
  How I can save relation between may data?  </p>
  
  <p>Please help me...</p>
  
  <p>----------- Edit ------------
   i don't want use SQLCipher !</p>
  
  <p>is there any way to use another data structure for saving data?</p>