How to write WHERE IN clause from a dynamic ArrayList for Android SQLite query

You can use the Android TextUtils class join method to make a comma separated list of IDs to put in the in clause.

String selection = KEY_GROUP_ID + " IN (" + TextUtils.join(", ", groupIds) + ")";
return db.query(TABLE_CUSTOMERS, new String[] { KEY_CUSTOMER_ID, KEY_NAME}, selection, null, null, null, null);

BTW if groupIds is a list of primary keys from another table you should be using Longs to store them not Integers otherwise it will overflow when the IDs get large.

return db.query(TABLE_CUSTOMERS, new String[] { KEY_CUSTOMER_ID, KEY_NAME }, KEY_GROUP_ID + " >=" + groupIdsLowLimit + " and " + KEY_GROUP_ID + " <=" + groupIdsUpLimit, null, null, null, null);

String where = "";
for (int i = 0; i < list.size(); i++) {
    where = where + KEY_GROUP_ID + " =" + list.get(i).toString() + "";
    if (i != (list.size() - 1))
        where = where + " or";
}

return db.query(TABLE_CUSTOMERS, new String[] { KEY_CUSTOMER_ID, KEY_NAME }, where, null, null, null, null);