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database_page.dart
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database_page.dart
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import 'package:flutter/material.dart';
import 'package:flutter_app/bean/bill_bean.dart';
import 'dart:convert';
import 'package:flutter_app/manager/bill_sql_manager.dart';
import 'package:flutter_app/utils/constant_utils.dart';
class DatabasePage extends StatefulWidget {
@override
_DatabasePageState createState() => _DatabasePageState();
}
class _DatabasePageState extends State<DatabasePage> {
BillSQLManager sqlManager;
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: Text('DBManager PAGE')),
body: ListView(children: <Widget>[
_itemWid('初始化数据库', 0, Colors.pink.withOpacity(0.5)),
_itemWid('插入1条数据', 1, Colors.brown.withOpacity(0.5)),
_itemWid('追加5条数据', 2, Colors.blue.withOpacity(0.5)),
_itemWid('查询数据条数', 3, Colors.brown.withOpacity(0.5)),
_itemWid('查询所有数据列表', 4, Colors.red.withOpacity(0.5)),
_itemWid('查询前3条数据列表', 5, Colors.brown.withOpacity(0.5)),
_itemWid('以3条为一页,查询第一页数据', 6, Colors.yellow.withOpacity(0.5)),
_itemWid('以3条为一页,查询第二页数据', 7, Colors.brown.withOpacity(0.5)),
_itemWid('更新1条数据', 8, Colors.teal.withOpacity(0.5)),
_itemWid('删除1条数据', 9, Colors.brown.withOpacity(0.5)),
_itemWid('删除所有数据', 10, Colors.orange.withOpacity(0.5)),
_itemWid('关闭数据库', 11, Colors.brown.withOpacity(0.5))
])));
}
_itemWid(text, index, color) {
return GestureDetector(
child: Container(
color: color,
height: 60,
child: Center(
child: Text(text,
style: TextStyle(color: Colors.white, fontSize: 16)))),
onTap: () => _itemClick(index));
}
_itemClick(index) {
switch (index) {
case 0:
sqlManager.initDB();
break;
case 1:
sqlManager.insertMap(
ConstantUtils.TABLE_BILL,
Map<String, dynamic>.from({
'billName': '早餐',
'billExp': '10.0',
'billInc': '0.0',
'billCount': '0',
'createTime': DateTime.now().millisecondsSinceEpoch,
'updateTime': DateTime.now().millisecondsSinceEpoch
}));
break;
case 2:
for (int i = 0; i < 5; i++) {
sqlManager.insertMap(
ConstantUtils.TABLE_BILL,
Map<String, dynamic>.from({
'billName': '账单${(i + 1)}',
'billExp': '${10 * (i + 1)}',
'billInc': '${20 * (i + 1)}',
'billCount': '0',
'createTime': DateTime.now().millisecondsSinceEpoch,
'updateTime': DateTime.now().millisecondsSinceEpoch
}));
}
break;
case 3:
sqlManager
.queryCount(ConstantUtils.TABLE_BILL)
.then((val) => showDialog(
context: context,
barrierDismissible: true,
builder: (context) {
return UnconstrainedBox(
constrainedAxis: Axis.vertical,
child: SizedBox(
width: 180.0,
height: 180.0,
child: AlertDialog(content: Text('$val'))));
}));
break;
case 4:
sqlManager
.queryList(ConstantUtils.TABLE_BILL)
.then((val) => _showDialog(val));
break;
case 5:
sqlManager
.queryList(ConstantUtils.TABLE_BILL, count: 3)
.then((val) => _showDialog(val));
break;
case 6:
sqlManager
.queryListByPage(ConstantUtils.TABLE_BILL, 3, 1)
.then((val) => _showDialog(val));
break;
case 7:
sqlManager
.queryListByPage(ConstantUtils.TABLE_BILL, 3, 2)
.then((val) => _showDialog(val));
break;
case 8:
BillBean billBean = BillBean();
billBean.billName = '更新标题';
billBean.billExp = "100.0";
billBean.billInc = "80.0";
billBean.createTime = DateTime.now().millisecondsSinceEpoch.toString();
billBean.updateTime = DateTime.now().millisecondsSinceEpoch.toString();
billBean.billCount = '90';
print('---map---${billBean.toMap()}');
sqlManager.insertByMap(ConstantUtils.TABLE_BILL, billBean.toMap());
sqlManager
.queryList(ConstantUtils.TABLE_BILL)
.then((val) => _showDialog(val));
break;
case 9:
sqlManager.deleteByParams(
ConstantUtils.TABLE_BILL, ConstantUtils.COL_BILLNAME, '更新标题');
sqlManager
.queryList(ConstantUtils.TABLE_BILL)
.then((val) => _showDialog(val));
break;
case 10:
sqlManager
.deleteAll(ConstantUtils.TABLE_BILL)
.then((val) => _showCountDialog(val));
break;
case 11:
sqlManager.closeDB();
break;
}
}
@override
void initState() {
super.initState();
sqlManager = BillSQLManager.getInstance();
// sqlManager.initDB();
}
_showDialog(List listData) {
return showDialog(
context: context,
builder: (context) {
return AlertDialog(
content: Container(
width: double.maxFinite,
child: ListView.builder(
itemCount: listData.length,
physics: ScrollPhysics(),
primary: false,
shrinkWrap: true,
itemBuilder: (BuildContext context, int index) {
return Text('${listData[index].toString()}');
})));
});
}
_showCountDialog(val) {
return showDialog(
context: context,
barrierDismissible: true,
builder: (context) {
return UnconstrainedBox(
constrainedAxis: Axis.vertical,
child: SizedBox(
width: 180.0,
height: 180.0,
child: AlertDialog(content: Text('$val'))));
});
}
}