![]() ![]() ![]() That is really one of the first things that you need to do when running into problems: if you are logging information to Logcat ( () and Log.w() in your code), see what logs you are getting. You have not indicated what specific messages you are seeing in Logcat from any of this. That means we do not have to worry about Play Store restrictions and the like. ("currentDBPath = " + currentDBPath) įileChannel src = new FileInputStream(currentDB).getChannel() įileChannel dst = new FileOutputStream(backupDB).getChannel() Īfter I’ve got this part working again, I’ll be able to see if the database can still be read.Īt February 3, 2021, 6:06pm, mmurphy replied:įrom prior conversations, this app appears to be just for your personal use. ("Can't find currentDBPath") Īnd this exports it… public boolean copyFileOut(Context context)įile sd = context.getExternalFilesDir(null) String backupDBPath = "/BEST/ProductDB/ProductData.db" įile currentDB = new File(data, currentDBPath) įile backupDB = new File(sd, backupDBPath) įileChannel src = new FileInputStream(backupDB).getChannel() įileChannel dst = new FileOutputStream(currentDB).getChannel() String currentDBPath = "/data/.haden.bestmobile/databases/ProductData.db" SQLiteDatabase db = this.getReadableDatabase() This copies the db file in from an external source… public boolean copyFileIn(Context context)įile sd = new File(Environment.getExternalStorageDirectory() + "/Android/data/.haden.bestmobile/files") įile data = new File(Environment.getDataDirectory() + "/user/0/.haden.bestmobile") I’m assuming that the problem is very similar. However, the database still does not work. You have already helped me repair the issues I had reading and writing CSV files with OpenCSV. My app was working fine until the latest Android update and then everything broke. Package import import import import import import import to read SQLite database from app from the CommonsWare Community archivesĪt February 3, 2021, 5:30pm, AlanHaden asked: The data stored can be checked on the logcat. In the below example, we are demonstrating the usage of the android SQLite database to store and fetch the data. Int update(String table, ContentValues values, String whereClause, String whereArgs)Ĭursor query(String table, String columns, String selection, String selectionArgs, String groupBy, String having, String orderBy) The values to be stored are specified by the third argument. The null values are stored by android, if the second argument is null and the values are empty. Completely null values are not allowed by the nullColumnHack. The table name is specified by the table. Long insert(String table, String nullColumnHack, ContentValues values) To execute the sql query not select query. Some of the important methods of the SQLiteDatabase class are: Method The SQLiteDatabase class has many methods. The methods like create, update, delete, select, etc, that are performed on the SQLite database are included in the SQLiteDatabase class. To be called when the database needs to be downgraded. Public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) To be called when the database needs to be upgraded. Public abstract void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) To be called when the database is created for the first time. ![]() Public abstract void onCreate(SQLiteDatabase db) Some of the important methods of the SQLiteOpenHelper class are: Method The SQLiteOpenHelper class has many methods. To create an object that can create, open and manage the database, and to also specify the error handler. SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version, DatabaseErrorHandler errorHandler) To create an object that can create, open and manage the database. SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) The SQLiteOpenHelper class has two constructors. The implementation of onCreate() and onUpgrade() methods of SQLiteOpenHelper class is required to be provided to perform any database operation. ![]() The functionality to use the SQLite database is provided by the class which is used for database creation and version management. ![]()
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