Question

I am new to using SQLite databases and android mobile development. I am trying to check if the username entered by a edit text field exists in the database. When I run it and click a button, the application crashes. This is my code.

 public boolean findUsername(String username) {
Cursor c = ourDatabase.query(true, DATABASE_TABLE_L, new String[] {
        KEY_USERID, KEY_USERNAME, KEY_PASSWORD,KEY_SECRETQ,KEY_ANSWER}, KEY_USERNAME + "="
        + username, null, null, null, null, null);
    if (c != null) {
      return true;
      }
      return false;
  }
}

The error from the log cat states that:

no such column: bobby: , while compiling: SELECT DISTINCT userId, username, password,    secretQ, answer FROM Login WHERE username=bobby

What am I doing wrong?

Answer 1

You should form your query like this

SELECT DISTINCT userId, username, password,    secretQ, answer FROM Login WHERE username='bobby'

You have to put quotes to username.

Cursor c = ourDatabase.query(true, DATABASE_TABLE_L, new String[] {
        KEY_USERID, KEY_USERNAME, KEY_PASSWORD,KEY_SECRETQ,KEY_ANSWER}, KEY_USERNAME + "='"
        + username +"'", null, null, null, null, null);

Try above.