Question

I have creating a login form where I have created sqlite database,in this I want to compare Count or Email in database if my email is in database so it will check the password,or if my email is not in database so it will call the web service.

So how can I compare Email or check count which user enter from the database?

Answer 1

In this method i check if the username already exists in the database or not.

// Read Section
public Boolean checkUsername(String username) throws SQLException {
    Cursor mCursor = db.query(TABLE_USERS, new String[] { ID, KEY_NAME,
            KEY_USERNAME }, KEY_USERNAME + "=" + "'" + username + "'",
            null, null, null, null, null);

    if (mCursor.moveToFirst()) {
        return true;
    }
    return false;
}

In this method i pass in Username and Password to check if the credentials match and if they do i log them in.

public Cursor login(String username, String password) throws SQLException {
    Cursor mCursor = db.query(TABLE_USERS, new String[] { ID, KEY_NAME,
            KEY_USERNAME }, KEY_USERNAME + "=" + "'" + username + "'"
            + "AND " + KEY_PASSWORD + "=" + "'" + password + "'", null,
            null, null, null, null);
    if (mCursor != null) {
        mCursor.moveToFirst();
    }
    return mCursor;
}