sqliteopenhelper

问题 When I'm trying to insert a record in onCreate method of my DbHelper class which is extended from SQLiteOpenHelper, this error will be rised. I've found some similar topics like these: Android getDatabase called recursively getWritableDatabase called recursively getDatabase called recursively but these are not going to help me. public class DbHelper extends SQLiteOpenHelper{ public int x=0; public DbHelper(Context context) { super(context, "shareholders.db", null, 1); } @Override public void

问题 I'm trying to add some records to a SQLite table, but LogCat is telling me the table does not exist. And DDMS shows that, yes, that table is not being/has not been created. Yet I do create the table in the SQLiteOpenHelper class: public class SQLiteHandlerDeliveryItem extends SQLiteOpenHelper { . . . @Override public void onCreate(SQLiteDatabase sqLiteDatabase) { String CREATE_DELIVERYITEMS_TABLE = "CREATE TABLE " + TABLE_DELIVERYITEMS + "(" + COLUMN_ID + " INTEGER PRIMARY KEY," + COLUMN

问题 I'm trying to add some records to a SQLite table, but LogCat is telling me the table does not exist. And DDMS shows that, yes, that table is not being/has not been created. Yet I do create the table in the SQLiteOpenHelper class: public class SQLiteHandlerDeliveryItem extends SQLiteOpenHelper { . . . @Override public void onCreate(SQLiteDatabase sqLiteDatabase) { String CREATE_DELIVERYITEMS_TABLE = "CREATE TABLE " + TABLE_DELIVERYITEMS + "(" + COLUMN_ID + " INTEGER PRIMARY KEY," + COLUMN

问题 I have my code below. It correctly reads my sqlite database file(that i have already created using the SQLite Database Browser) in my assets folder - moves it to the /data/data/packagename/databases/ path on my device then i am able to use a query and cursor to get my information and it works great. Code here: public class DatabaseHelper extends SQLiteOpenHelper { private Context myDbContext; private static String dbName = "restaurant.db"; private static String outfilePath = "/data/data/dev

问题 I'm using prepopulated sqlite database in my app and i'm trying to update my database in my android application but the onUpgrade method doesn't get called when I increment the version number. i tried googling, searched on stackoverflow but nothing helped. if I uncomment this.getReadableDatabase() in my constructor the onUpgrade method gets called but I can't query the data and returns error. Here is my code. public class DatabaseHelper extends SQLiteOpenHelper { private static final String

问题 I am working in sqlite db in my application using c++ linux. I have a requirement to replicate the sqlite db in another machine. for this , since sqlite does not have replication machanism and also it does not have any network APIs , i want to read the sqlite db file using c++ fstream and create a new db file in the other machine. i am struggling for a day. Can anybody help me in this. Below is the code : ifstream _fstream; _fstream.open("Sourcefile",ios::in); ofstream _ostream; _ostream.open

问题 so I want to make an app that lists foods that I have stored in an already existing SQLite database I created. I have my foodDB.db file in the /assets/databases folder. I know I must use a DatabaseHelper class. I have done my fair share of research, I have looked at plenty of stackoverflow posts and youtube tutorials but none satisfy my critera of populating a ListView from an existing database in the asset folder. I find them very confusing and not clear. Could someone please clearly explain

问题 First up, I am new to android apps and am not working solo on this. My team mate has taken design while I handle this, and asked me to set up the database and the method to do this, etc etc. So while most of this seems to be ok, I put: Context context = null; DataBaseHelper drinksDataBase = new DataBaseHelper(context); into his main activity. The constructer is as follows: public DataBaseHelper(Context context) { super(context, DB_NAME, null, 1); this.myContext = context; try{ createDataBase(

问题 I am facing a very strange problem. I am developing an android application that has an sqlite DB as its database. I am using DBAdapter class which extends SQLiteOpenHelper. I have searched on internet but can't find a solution. Here is my SQLiteOpenHelper class public class DBAdapter extends SQLiteOpenHelper{ private static DBAdapter mInstance = null; /**The Android's default system path of your application database. */ private static String DB_PATH = "/data/data/com.mydbapp.android/databases

问题 I am facing a very strange problem. I am developing an android application that has an sqlite DB as its database. I am using DBAdapter class which extends SQLiteOpenHelper. I have searched on internet but can't find a solution. Here is my SQLiteOpenHelper class public class DBAdapter extends SQLiteOpenHelper{ private static DBAdapter mInstance = null; /**The Android's default system path of your application database. */ private static String DB_PATH = "/data/data/com.mydbapp.android/databases