Android: Content resolver query returning 0 rows when it ought not to

Question

Cursor cursor = resolver.query(
    Data.CONTENT_URI,
    DataQuery.PROJECTION,
    DataQuery.SELECTION,
    new String[] {String.valueOf(rawContactId)},
    null);
         


        

Answer 1

There are a few issues that i could locate with the following query:

Cursor cursor = resolver.query(Data.CONTENT_URI, 
                               UserIdQuery.PROJECTION, 
                               UserIdQuery.SELECTION, 
                               new String[] {username}, null);

1. If all the columns are pointing out at RawContacts table then you should use RawContacts.CONTENT_URI instead of Data.CONTENT_URI.

2. Here the value of RawContacts.SOURCE_ID is compared with username

   public static final String SELECTION = RawContacts.ACCOUNT_TYPE + "='" + 
           "com.tagapp.android" + "' AND " + RawContacts.SOURCE_ID + "=?";
   
   new String[] {username}
   

Answer 2

There was an error in the lookupRawContactId method, the rawcontactId long I was getting wasn't the right one. It should have looked like this:

private static long lookupRawContact(ContentResolver resolver, String username) {
    Log.e("Looking up Raw Contact", username);
    long authorId = 0;
    Cursor cursor = resolver.query(
        RawContacts.CONTENT_URI,
        UserIdQuery.PROJECTION,
        UserIdQuery.SELECTION,
        new String[] {username},
        null);

    try {
        if(cursor != null && cursor.moveToFirst()) {
            authorId = cursor.getLong(UserIdQuery.COLUMN_ID);
        }
    } finally {
        if(cursor != null) {
            cursor.close();
        }
    }
    return authorId;
}