I've seen a lot of ties between the onCreate and onOpen methods and SQLite database management in Android.
I am an iOS developer and I'm trying to "translate" (so to speak) my cocoa library so it could be used on Android. I need to create an SQLite database at runtime. I don't have an activity - since this is a library I'm creating. It seems I can't create a DB without an activity, is this correct ?
To create sqlite db, you don't basically need an activity in the library.it needs a context!!, You can have a method in library/class which basically take a context in input/parameter and create database.
This context can be passed from application activity or service or receiver.
I don't see why you should not be able to open a database without an activity. You need to extend SQLiteOpenHelper.
public class MyDatabase {
private final DatabaseHelper databaseHelper;
private SQLiteDatabase db;
private static final String DATABASE_NAME = "com.my.db";
private static final int DATABASE_VERSION = 1;
public MyDatabase(Context context) {
databaseHelper = new DatabaseHelper(context);
}
private static class DatabaseHelper extends SQLiteOpenHelper {
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
//use db.execSQL to create the database
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// use db.execSQL to update (modify) the database
}
}
public SQLiteDatabase open() throws SQLException {
db = databaseHelper.getWritableDatabase();
return db;
}
}
