![]() ![]() ![]() 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. If( TextUtils.isEmpty(EmailHolder) || TextUtils.Yesterday i spent whole day behind using my database i mean database is created i just require to use it in app. Checking EditText is empty or no using TextUtils. PasswordHolder = Password.getText().toString() Getting value from All EditText and storing into String Variables.ĮmailHolder = Email.getText().toString() Toast.makeText(MainActivity.this,"Please Enter UserName or Password.",Toast.LENGTH_LONG).show() If any of login EditText empty then this block will be executed. TempPassword = cursor.getString(cursor.getColumnIndex(SQLiteHelper.Table_Column_3_Password)) Storing Password associated with entered email. ![]() Public class SQLiteHelper extends SQLiteOpenHelper, null, null, null) After that write these block of codes inside the DatabaseHelper class. To create this first create a new java file called DatabaseHelper, open the newly created file then extend the class by adding SQLiteOpenHelper. This code contain the script for creating a database and a database connection. It contains some libraries that needed to access the several methods within the app. It describes the overall information about the application. The Android Manifest file provides essential information about your app to the Android system in which the system must require before running the code. READ ALSO: All in One Game App using Android Studio Source Code Locate the new layout file called activity_register.xml and write these code inside the file. It will also created a new java file called Register. Then after that create a new empty activity called Login. ![]() Next is the creation of activity_dashboard.xml after successfully logging in with the user. ![]()
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