How can I detect when an element doesn't exist in my table? I need because I want to update/insert contacts on it. My problem it's that I want to insert a new contact by using ContentObserver but this element is called multiple times and I'm selecting the last element. So when i insert a new contact, I select the last element, I'm trying to identify if exists on the db and insert it.
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2 Answers
use a boolean value to check whether the contact exist or not
boolean contact = myDbHelper.checkidExitsorNot(ur table name,row name , value);
public boolean checkidExitsorNot(String tablename, String rowname, String id) {
String queryf = "select * from " + tablename + " where " + rowname + "='" + Integer.valueOf(id) + "'";
Cursor c = myDataBase.rawQuery(queryf, null);
if (c.getCount() == 0) {
c.close();
return true;
}else {
c.close();
return false;
}
}
if the return is true then it does not exist if false it exist
Comments
You can check by using count(*) function in database.
1 Comment
Andy
Y you did not accept this answer? as before you done now you changed?