Question

Enviroment: Android
Database: SQLite based

I have a database created with sqlite, the database contains users details such as login, password, name, surname, country. My problem is to create query which will check the login and password [ so select query ] and than allow or not to proceed.

public void logineSelector(String log, String pass){
String[] kolumny = new String[]{colLogin, colPassword};
Cursor cursor= sqLiteDatabase.query(Usr_TABLE, kolumny, pass, null, null, null, null);
}

but the this makes the whole program total mess, debug console gives me this:

Fatal Exception: Main
Java.lang.IllegalStateException: Could not execute method of the activity
.....

any suggestions what to do?

Answer 1

You’re not calling the query method with the correct parameters. Check the javadoc.

If you’re trying to find the user with the login/password that you pass into the method, you probably want to do something like:

Cursor cursor = sqLiteDatabase.query(Usr_TABLE, kolumny,USER_COL+"= ? and "+PASS_COL + "= ?", new String[]{log,pass},null,null,null);

assuming that you have defined USER_COL and PASS_COL to contain the names of the columns in question.