这是架构:
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:
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 });