Private static class DatabaseHelper extends SQLiteOpenHelper Designing xml Layout activity_main.xml file Public static String dbTable = "contacts" Public static String dbname = "ContactsDB" If you have some basic about sql command than it will be easy for you to understand Android SQLite database.However this tutorial is for everyone who wants to develop android app using SQLite.Īs exapmle, the name of our database is "ContactsDB", it has one table called "contacts" with five columns (_id, name, number, email, address) In this tutorial I’ll be discussing how to write classes to handle all SQLite operations. SQLite is a very light weight database which comes with Android OS. when you click on any list item, a new screen will come with details of selected contacts.A search filter helps you to find a specific contact.To edit, insert and delete an item this app will also contain some buttons.Īndroid provides several ways to store user and app data. In this tutorial we are going to make an app that shows you a list of some contacts. i have also written tutorial about add, update and display records from database so if you have any query regarding that also check this out.Today i will discuss about android SQLite database with complete example ( create, insert, update, delete, filter) it may happen you may find some new error then also let me know so other can also solve that and i will try my best to solve that problem. if you find any error or if you have any query let me know. The open method will return instance of database after checking weather it is opened or not. now from all other class or activity just call open method. you can see in debug window also because i have used Logger to know weather database is copied or not so check debug window in editor. Now your database file created or copied so just check it if you have created display method or activity then open it and check it. now from your main activity just call the onCreate method for that put below code in it.ĭbHelper helper = new DbHelper(Main.this) because it create bad impect when you publish your app in Google play store and it crash so for safety side you can do this. This.ourdb = void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) Ĭursor c = (product_table,colums, null, null, null, null, null, null) Īs you can see i have even checked if there is no file in assets folder it will create blank database so application won't crash. + rating + " INTEGER ," + quantity +" INTEGER ) ") InputStream input = cont.getAssets().open(DB_NAME) ĭb.execSQL("create table " + product_table +" ( "+ order_id + " INTEGER PRIMARY KEY AUTOINCREMENT, " + pname + " TEXT NOT NULL ," + desc + " TEXT ," Toast.makeText(cont, "Database Already Exist.", Toast.LENGTH_LONG).show() nt = void onCreate(SQLiteDatabase db)įile dbFile = cont.getDatabasePath(DB_NAME) Public static final String rating = "rating" Public static final String quantity = "quantity" Public static final String desc = "desc" Public static final String pname = "pname" Public static final String order_id = "_id" Public static final String product_table = "tblproduct" Public static final String DB_NAME = "mydb.db" Public class DbHelper extends SQLiteOpenHelper if your database is big you can display progress bar for loading process. so for the first time it will create or copy your database. From your Main Activity only first time call Oncreate method of SQLiteOpenHelper Class. beacuse it call onCreate method internally. this code will check if database exist then do nothing because if you won't check it will overwrite your database every time you call getWritableDatabase Or getReadableDatabase Method. if you have done some other task in oncreate method then rearrange it after this code. you have to put this code in onCreate method. Put below code in your SQLiteOpenHelper Class file. Just go through the full tutorial and i hope it will solve all problems regarding coping database. so to save your time and without doing all this you can copy database from assets folder to internal storage. You have to debug your app and in android studio it is also tedious task. some times it also happens you can not copy big database and it is also big problem in android. For that you have to dig up in to your code. even if there is table and also data in it. For some of them you can find online solution but some are really unknown like null pointer exception or getWritableDatabase method called recursively etc. And i came across many problems, Some of them were really annoying and confusing. Yesterday i spent whole day behind using my database i mean database is created i just require to use it in app.
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