Android sqlite select查询带有数组值的where子句

Question

我有一个字符串数组，我想通过带字符串数组的where子句查询。

Answer 1

您需要从数组构建一串用逗号分隔的值，而不是通过数组。

假设

    String[] getAnswerIds = new String[]{"1","4","16","18","20"};
    boolean after_first = false;
    StringBuilder sb = new StringBuilder();
    for (String s: getAnswerIds) {
        if (after_first) {
            sb.append(",");
        } else {
            after_first = true;
        }
        sb.append(s);
    }
    String your_list_of_values = sb.toString();

然后your_list_of_values将是字符串 1、4、16、18、20 ，然后只需将该字符串放在查询中的适当位置即可。

例如

    Cursor mycursor = db.rawQuery("SELECT * FROM questions WHERE ID IN(" + your_list_of_values + ")",null);