Question

我已经在“自定义列表视图”中尝试了以下代码。我尝试将“呼叫类型”替换为“传入”，“传出”和“未命中”，它显示了数字格式异常：对于输入字符串“ type”

assert cr != null;
if (cr.moveToLast()) {
    for (int i = 0; i < cr.getCount(); i++) {
        CallLogData cons = new CallLogData();

        cons.setNumber(cr.getString(cr.getColumnIndex(CallLog.Calls. NUMBER)));
        cons.setType(cr.getString( cr.getColumnIndex(CallLog.Calls. TYPE)));
        callsListView.add(cons);

        cr.moveToPrevious();
    }

    String dir = null;
    int dircode = Integer.parseInt(getString(Integer.parseInt(CallLog.Calls. TYPE)));
    switch (dircode) {
        case CallLog.Calls.OUTGOING_TYPE:
            dir = "OUTGOING";
            break;

            case CallLog.Calls.INCOMING_TYPE:
                dir = "INCOMING";
                break;

            case CallLog.Calls.MISSED_TYPE:
                dir = "MISSED";
                break;
        }

        sb.append("\n  ").append(dir);

    }
cr.close();

这行我出错了

 int dircode = Integer.parseInt(getString(Integer.parseInt(CallLog.Calls. TYPE)));

Answer 1

CallLog.Calls.TYPE是列名，而不是整数，因此无法将其解析为一个。

根据这一行，您的数据库也包含该类型的字符串，而不是数字。

@Query(value="SELECT * FROM mytable WHERE delivery_date >= ?1", nativeQuery = true)

and
Query(value="SELECT * FROM accounts_data WHERE updated \\= ?1", nativeQuery = true)

如果您希望cons.setType(cr.getString(cr.getColumnIndex(CallLog.Calls.TYPE)));存储类型的字符串值，则应将开关大小写上移，并可能使用数据库中的CallLogData，因为这似乎是类型为...尽管，您应该参考getInt语句进行验证。

CREATE TABLE

如果数据库列确实是一个字符串，那么您想要这个

if (cr.moveToLast()) {
    int numIdx = cr.getColumnIndex(CallLog.Calls.NUMBER);
    int typeIdx = cr.getColumnIndex(CallLog.Calls.TYPE);

    for (int i = 0; i < cr.getCount(); i++) {
        CallLogData cons = new CallLogData();
        cons.setNumber(cr.getString(numIdx));

        String type;
        int callType = cr.getInt(typeIdx);
        switch (callType) {
            case CallLog.Calls.OUTGOING_TYPE:
                type = "OUTGOING";
                break;
            case CallLog.Calls.INCOMING_TYPE:
                type = "INCOMING";
                break;
            case CallLog.Calls.MISSED_TYPE:
                type = "MISSED";
                break;
            default:
                type = "UNKNOWN";
        }
        cons.setType(type);
    }

此外，如果您自己插入/创建了数据库值，则可以将整数类型更改为字符串值，而不是在查询时。

输入字符串“类型”自定义列表视图的抛出数字格式异常

1 个答案: