如何通过其值而不是位置来设置微调默认值?

问题描述

我在数据库中有1-50条记录.我正在使用游标获取这些数据，并使用简单游标适配器将这些值设置为Spinner.现在我需要的是设置一个值，比如说第39个值作为默认值.但是我不希望通过其位置来设置它的值.

I have 1-50 records in the database. I am fetching those data using cursor and set those values to Spinner using Simple Cursor Adapter. Now what i need is i want to set one value say 39th value as default. But not by its position i want to set by its value.

我知道如何根据其位置设置微调器默认值

I know how to set the spinner default by its position

   spinner.setSelection(39)

会将微调器设置为该值.

will set the spinner to that value.

但是我对通过数据库中的值(文本)设置微调器默认值一无所知.我知道数据库中的值.例如，书"是微调器中的值之一.我需要将微调框默认设置为书籍.

But i didn't have any idea about setting the spinner default by its value(text) in the database.I know the values in the database. For eg "books" is one of the value in the spinner. I need to set the spinner default as books.

有没有办法做到这一点?

Is there any possible way to do this?

推荐答案

最后，我通过使用以下方法解决了该问题，其中旋转器的位置可以通过其字符串获取

Finally, i solved the problem by using following way, in which the position of the spinner can be get by its string

private int getPostiton(String locationid,Cursor cursor)
{
    int i;
    cursor.moveToFirst();
    for(i=0;i< cursor.getCount()-1;i++)
    {

        String locationVal = cursor.getString(cursor.getColumnIndex(RoadMoveDataBase.LT_LOCATION));
        if(locationVal.equals(locationid))
        {
            position = i+1;
            break;
        }
        else
        {
            position = 0;
        }
        cursor.moveToNext();
    }

调用方法

    Spinner location2 = (Spinner)findViewById(R.id.spinner1);
    int location2id = getPostiton(cursor.getString(3),cursor);
    location2.setSelection(location2id);

我希望它会对某些人有所帮助.

I hope it will help for some one..

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