Writing to pre-existing SQLite Database Android
===

Okay so my android app makes use of a pre-existing database, which I access using this

http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/

Now I have no problem reading data from the database, but I cannot seem to add to it. The problem is the database file is never updated, only the instance of the database I have running at the time. I need the changes I make to the database to be permanent, so I tried to serialize the instance of the database, but found that it cannot be done. I think that after I add to the instance of my database, I need to export this to a file, an with it overwrite the my database file. I'm not sure how I would go about and have read every comment from the site above and have gone through countless post here as well. 

I could be wrong but that's the only way I can imagine it being done. 



    public void addTenantWithoutProperty(String name, String email, String phone){
	
        //This method reads from my database
	ArrayList<Tenants> tenants = (ArrayList<Tenants>) getAllTenants();
    
    //Checks data in the database before I try add to it
    for(int i = 0;i < tenants.size();i++){
   	 String name;
   	 name = tenants.get(i).getName();
   	 
   	 System.out.println(i + " before " + names);
    }
    
    //I have also tried adding to it using ContentValues, but it makes no difference
    String tenantsql = "INSERT INTO tenants (name, phone, email) VALUES ('" + name + "','"        
    + phone + "','" +  email + "')";
	
	
	myDataBase.execSQL(tenantsql);
	
	  	    
	tenants = (ArrayList<Tenants>) getAllTenants();
   

	 
     //checks data in database after insertion 
     for(int i = 0;i < tenants.size();i++){
    	 String names;
    	 names = tenants.get(i).getName();
    	 
    	 System.out.println(i + " after " + names);
     }
	
        
     }
   
This is called on a button click, and the output shows that the data is being added, but it does not cause a permanent change in the database. How can I get around this? Any help at all would be greatly appreciated 
