SQLite查询:获取一行的所有列(android)?

时间:2013-06-23 08:32:51

标签: java android sqlite android-sqlite

这是架构:

enter image description here

SQL查询是:  SELECT * from unjdat,其中col_1 =“ myWord ”;

即,我想显示col_1为 myWord 的行的所有列。

int i;
String temp;
words = new ArrayList<String>();
Cursor wordsCursor = database.rawQuery("select * from unjdat where col_1 = \"apple\" ", null); //myWord is "apple" here
    if (wordsCursor != null)
        wordsCursor.moveToFirst();
    if (!wordsCursor.isAfterLast()) {
        do {
            for (i = 0; i < 11; i++) {
                temp = wordsCursor.getString(i);
                words.add(temp);
           }
        } while (wordsCursor.moveToNext());
    }
    words.close();

我认为问题在于循环。如果我删除for循环并执行wordsCursor.getString(0)则可行。 如何循环获取所有列?

注意

  1. col_1永远不为null,对于某些行,col_2到col_11的任何一个都可以为null。
  2. 表格中的所有列和所有行都是唯一的。

1 个答案:

答案 0 :(得分:11)

这应该是

Cursor cursor = db.rawQuery(selectQuery, null);
    ArrayList<HashMap<String, String>> maplist = new ArrayList<HashMap<String, String>>();
    // looping through all rows and adding to list

    if (cursor.moveToFirst()) {
        do {
            HashMap<String, String> map = new HashMap<String, String>();
            for(int i=0; i<cursor.getColumnCount();i++)
            {
                map.put(cursor.getColumnName(i), cursor.getString(i));
            }

            maplist.add(map);
        } while (cursor.moveToNext());
    }
    db.close();
    // return contact list
    return maplist;

编辑用户想知道如何使用HashMap填充ListView

//listplaceholder is your layout
//"StoreName" is your column name for DB
//"item_title" is your elements from XML

ListAdapter adapter = new SimpleAdapter(this, mylist, R.layout.listplaceholder, new String[] { "StoreName",
                "City" }, new int[] { R.id.item_title, R.id.item_subtitle });
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