Android 数据库SQLite Cursor数据遍历读取

public List<PointBean> getAllPoints() {
String sql = "select * from points";
SQLiteDatabase db = helper.getWritableDatabase();
List<PointBean> pointList = new ArrayList<PointBean>();
PointBean point = null;
Cursor cursor = db.rawQuery(sql, null);
while (cursor.moveToNext()) {
point = new PointBean();
point.setPointName(cursor.getString(cursor
.getColumnIndex("point_name")));
point.setLongitude(cursor.getDouble(cursor
.getColumnIndex("longitude")));
point.setLatitude(cursor.getDouble(cursor
.getColumnIndex("latitude")));
pointList.add(point);
}
return pointList;
}

Cursor是SQLite 数据库查询返回的行数集合，Cursor是一个游标接口，提供了遍历查询结果的方法，如移动指针方法move()，获得列值方法getString()等。以下是Cursor遍历的方法。

工具/原料

编译环境Eclipse

方法/步骤

1

通过query获取数据：

SQLiteDatabase dataBase=sqliteDB.openDB();

String table="tab_running";

String[] columns={"startaddress","startgpstime","startsystime","endaddress","endgpstime","endsystime"};//你要的数据  

String selection="finished=?";  

String[] selectionArgs={"1"};//具体的条件,注意要对应条件字段  

Cursor cursor=dataBase.query(table, columns, selection, selectionArgs, null, null, null);

2

根据列索引遍历读取列数据：

while(cursor.moveToNext())

{

//根据列的索引直接读取  比如第0列的值

   String strValue= cursor.getString(0);  

}

3

根据列名获取列索引遍历读取列数据：

while(cursor.moveToNext())

{

//根据列名获取列索引   

int nameColumnIndex = cursor.getColumnIndex(“username");

String strValue=cursor.getString(nameColumnIndex); 

}