java.lang.IllegalArgumentException: column '_id' does not exist

Question

I\'m trying to debug my application on a real device but I get this error:

ERROR/AndroidRuntime(981): Caused by: java.lang.IllegalArgumentException:

Answer 1

I have had similar problem because I was not adding the _id column to the projection argument, so adding _id to the projections argument of the query was the solution. (commented by @nobugs)

---

Example:

 String[] projections = {"_id", "name", "age"};

 Cursor cursor = db.query(domainClass.getSimpleName(), projections, 
     null, null, null, null, null);

Answer 2

You are trying to use a cursor that REQUIRES a column called _id. Its as simple as editing your table creation statement and adding a column called _id.

Its declartion looks something like this:

_id INTEGER PRIMARY KEY AUTOINCREMENT

Add this and you will then be able to use it. I believe this is a requirement that is required in order to use a SimpleCursorAdapter.

UPDATE

"CREATE TABLE IF NOT EXISTS contact_data( _id INTEGER PRIMARY KEY AUTOINCREMENT, contact_id INTEGER, contact_name VARCHAR(50), number_type VARCHAR(50), contact_number VARCHAR(50), duration TIME, duration_sum TIME, date DATE, current_time TIME, cont INTEGER, type VARCHAR, month VARCHAR(50), day VARCHAR(50), year VARCHAR(50));"

Solution: add a space between the left parenthesis '(' and _id

Answer 3

I did this and solved my problem.

Before

SELECT id

After

SELECT id as _id

Answer 4

First of all uninstall the app, and then do following steps:

1. Clean the project
2. rebuild he project
3. debug the app(Shift+F9)

Answer 5

CursorAdapter always requires a _id column to be present. So, in the list of projections used for creating Cursor, you need to add _id column.