Android開発(三)データベースストレージ
90952 ワード
1、Sqliteデータベースを使用してユーザーの情報を保存し、ここで二つの表t_が建てられたuser,t_address.t_userはユーザ情報を格納し、t_addressは、ユーザのアドレス情報を格納する.
UserInfo対応t_を表すには、2つのクラスを使用します.userテーブル、Addressクラス対応t_address、パッケージcom.diandianmi.modelに2つのクラスがあります.詳細は次のとおりです.
UserInfoクラス
UserInfoListクラス
Addressクラス
2、SqliteHelperクラスはSQLiteOpenHelperを継承し、データベースを操作する.SQLiteOpenHelperは、Androidが提供するデータベースを管理するツールクラスで、データベースの作成とバージョンの更新を管理できます.SQLiteOpenHelperのサブクラスを作成し、そのonCreate(SQLiteDatabase db)メソッドとonUpgrade(SQLiteDatabase db,int oldVersion,int newVersion)メソッドを拡張するのが一般的です.サービス操作クラスとしてcom.diandianmi.serviceを構築します.
SqliteHelperクラス
3.データベースの操作を行うDatabaseSerivceクラス.
クエリー・メソッドでCursorオブジェクトを返します.AndroidのCursorはJDBCのResultSetに似ています.
UserInfo対応t_を表すには、2つのクラスを使用します.userテーブル、Addressクラス対応t_address、パッケージcom.diandianmi.modelに2つのクラスがあります.詳細は次のとおりです.
UserInfoクラス
1
package
com.diandianmi.model;
2
3
import
java.sql.Timestamp;
4
5
import
android.graphics.Bitmap;
6
7
public
class
UserInfo {
8
public
static
final
String ID
=
"
_id
"
;
//
Id
9
public
static
final
String USERID
=
"
userid
"
;
//
Id
10
public
static
final
String NAME
=
"
name
"
;
//
11
public
static
final
String NICKNAME
=
"
nickname
"
;
//
12
public
static
final
String PASSWORD
=
"
password
"
;
//
13
public
static
final
String SEX
=
"
sex
"
;
//
14
public
static
final
String ICON
=
"
icon
"
;
//
15
public
static
final
String EMAIL
=
"
email
"
;
//
16
public
static
final
String CELLPHONE
=
"
cellphone
"
;
//
17
public
static
final
String TELEPHONE
=
"
telephone
"
;
//
18
public
static
final
String CONSTELLATION
=
"
constellation
"
;
//
19
public
static
final
String BLOODTYPE
=
"
bloodtype
"
;
//
20
public
static
final
String HONOR
=
"
honor
"
;
//
21
public
static
final
String HONESTY
=
"
honesty
"
;
//
22
public
static
final
String MONEY
=
"
money
"
;
//
23
public
static
final
String HOBBY
=
"
hobby
"
;
//
24
public
static
final
String ORIGINALADDRESS
=
"
originaladdress
"
;
//
25
public
static
final
String CURRENTADDRESS
=
"
currentAddress
"
;
//
26
public
static
final
String REGISTERTIME
=
"
registertime
"
;
//
27
28
private
int
id;
29
private
String userId;
30
private
String name;
31
private
String nickname;
32
private
String password;
33
private
String sex;
34
private
Bitmap icon;
35
private
String email;
36
private
String cellphone;
37
private
String telephone;
38
private
String constellation;
39
private
String bloodType;
40
private
int
honor;
41
private
int
honesty;
42
private
int
money;
43
private
String hobby;
44
private
Address originalAddress;
45
private
Address currentAddress;
46
private
Timestamp registerTime;
47
public
int
getId() {
48
return
id;
49
}
50
public
void
setId(
int
id) {
51
this
.id
=
id;
52
}
53
public
String getUserId() {
54
return
userId;
55
}
56
public
void
setUserId(String userId) {
57
this
.userId
=
userId;
58
}
59
public
String getName() {
60
return
name;
61
}
62
public
void
setName(String name) {
63
this
.name
=
name;
64
}
65
public
String getPassword() {
66
return
password;
67
}
68
public
void
setPassword(String password) {
69
this
.password
=
password;
70
}
71
public
Bitmap getIcon() {
72
return
icon;
73
}
74
public
void
setIcon(Bitmap icon) {
75
this
.icon
=
icon;
76
}
77
public
String getEmail() {
78
return
email;
79
}
80
public
void
setEmail(String email) {
81
this
.email
=
email;
82
}
83
84
public
String getConstellation() {
85
return
constellation;
86
}
87
public
void
setConstellation(String constellation) {
88
this
.constellation
=
constellation;
89
}
90
public
String getBloodType() {
91
return
bloodType;
92
}
93
public
void
setBloodType(String bloodType) {
94
this
.bloodType
=
bloodType;
95
}
96
public
int
getHonor() {
97
return
honor;
98
}
99
public
void
setHonor(
int
honor) {
100
this
.honor
=
honor;
101
}
102
public
int
getHonesty() {
103
return
honesty;
104
}
105
public
void
setHonesty(
int
honesty) {
106
this
.honesty
=
honesty;
107
}
108
public
int
getMoney() {
109
return
money;
110
}
111
public
void
setMoney(
int
money) {
112
this
.money
=
money;
113
}
114
public
Address getOriginalAddress() {
115
return
originalAddress;
116
}
117
public
void
setOriginalAddress(Address originalAddress) {
118
this
.originalAddress
=
originalAddress;
119
}
120
public
Address getCurrentAddress() {
121
return
currentAddress;
122
}
123
public
void
setCurrentAddress(Address currentAddress) {
124
this
.currentAddress
=
currentAddress;
125
}
126
public
Timestamp getRegisterTime() {
127
return
registerTime;
128
}
129
public
void
setRegisterTime(Timestamp registerTime) {
130
this
.registerTime
=
registerTime;
131
}
132
public
String getHobby() {
133
return
hobby;
134
}
135
public
void
setHobby(String hobby) {
136
this
.hobby
=
hobby;
137
}
138
public
String getTelephone() {
139
return
telephone;
140
}
141
public
void
setTelephone(String telephone) {
142
this
.telephone
=
telephone;
143
}
144
public
String getCellphone() {
145
return
cellphone;
146
}
147
public
void
setCellphone(String cellphone) {
148
this
.cellphone
=
cellphone;
149
}
150
public
String getSex() {
151
return
sex;
152
}
153
public
void
setSex(String sex) {
154
this
.sex
=
sex;
155
}
156
public
String getNickname() {
157
return
nickname;
158
}
159
public
void
setNickname(String nickname) {
160
this
.nickname
=
nickname;
161
}
162
163
}
164
UserInfoListクラス
1
package
com.diandianmi.model;
2
3
import
java.util.ArrayList;
4
5
public
class
UserInfoList
extends
ArrayList
<
UserInfo
>
{
6
7
}
8
Addressクラス
1
package
com.diandianmi.model;
2
3
public
class
Address {
4
5
public
static
final
String ID
=
"
_id
"
;
//
Id
6
public
static
final
String PROVINCE
=
"
province
"
;
//
7
public
static
final
String CITY
=
"
city
"
;
//
8
public
static
final
String COUNTY
=
"
county
"
;
//
9
public
static
final
String TOWN
=
"
town
"
;
//
10
public
static
final
String STREET
=
"
street
"
;
//
11
12
private
String province;
13
private
String city;
14
private
String county;
15
private
String town;
16
private
String street;
17
public
String getProvince() {
18
return
province;
19
}
20
public
void
setProvince(String province) {
21
this
.province
=
province;
22
}
23
public
String getCity() {
24
return
city;
25
}
26
public
void
setCity(String city) {
27
this
.city
=
city;
28
}
29
public
String getCounty() {
30
return
county;
31
}
32
public
void
setCounty(String county) {
33
this
.county
=
county;
34
}
35
public
String getTown() {
36
return
town;
37
}
38
public
void
setTown(String town) {
39
this
.town
=
town;
40
}
41
public
String getStreet() {
42
return
street;
43
}
44
public
void
setStreet(String street) {
45
this
.street
=
street;
46
}
47
}
48
2、SqliteHelperクラスはSQLiteOpenHelperを継承し、データベースを操作する.SQLiteOpenHelperは、Androidが提供するデータベースを管理するツールクラスで、データベースの作成とバージョンの更新を管理できます.SQLiteOpenHelperのサブクラスを作成し、そのonCreate(SQLiteDatabase db)メソッドとonUpgrade(SQLiteDatabase db,int oldVersion,int newVersion)メソッドを拡張するのが一般的です.サービス操作クラスとしてcom.diandianmi.serviceを構築します.
SqliteHelperクラス
1
package
com.diandianmi.service;
2
3
import
com.diandianmi.model.UserInfo;
4
5
import
android.content.Context;
6
import
android.database.sqlite.SQLiteDatabase;
7
import
android.database.sqlite.SQLiteDatabase.CursorFactory;
8
import
android.database.sqlite.SQLiteOpenHelper;
9
10
public
class
SqliteHelper
extends
SQLiteOpenHelper {
11
12
public
static
final
String TB_NAME
=
"
t_user
"
;
13
public
static
final
String TB_ADDRESS
=
"
t_address
"
;
14
15
public
SqliteHelper(Context context, String name, CursorFactory factory,
16
int
version) {
17
super
(context, name, factory, version);
18
}
19
20
@Override
21
public
void
onCreate(SQLiteDatabase db) {
22
String sql
=
"
CREATE TABLE IF NOT EXISTS
"
+
23
TB_NAME
+
"
(
"
+
24
UserInfo.ID
+
"
integer primary key,
"
+
25
UserInfo.USERID
+
"
varchar(100),
"
+
26
UserInfo.NAME
+
"
varchar(100),
"
+
27
UserInfo.NICKNAME
+
"
varchar(100),
"
+
28
UserInfo.PASSWORD
+
"
varchar(100),
"
+
29
UserInfo.SEX
+
"
varchar(10),
"
+
30
UserInfo.EMAIL
+
"
varchar(255),
"
+
31
UserInfo.TELEPHONE
+
"
varchar(12),
"
+
32
UserInfo.CELLPHONE
+
"
varchar(11),
"
+
33
UserInfo.CONSTELLATION
+
"
varchar(10),
"
+
34
UserInfo.BLOODTYPE
+
"
varchar(5),
"
+
35
UserInfo.HONOR
+
"
integer,
"
+
36
UserInfo.HONESTY
+
"
integer,
"
+
37
UserInfo.MONEY
+
"
integer,
"
+
38
UserInfo.HOBBY
+
"
varchar(255),
"
+
39
UserInfo.REGISTERTIME
+
"
varchar(20),
"
+
40
UserInfo.ICON
+
"
blob
"
+
41
"
)
"
;
42
db.execSQL(sql);
43
44
sql
=
"
CREATE TABLE IF NOT EXISTS
"
+
45
TB_ADDRESS
+
"
(
"
+
46
"
_id integer primary key,
"
+
47
"
userid varchar(100),
"
+
48
"
province varchar(5),
"
+
49
"
city varchar(10),
"
+
50
"
country varchar(20),
"
+
51
"
town varchar(50),
"
+
52
"
street varchar(100)
"
+
53
"
)
"
;
54
db.execSQL(sql);
55
}
56
57
@Override
58
public
void
onUpgrade(SQLiteDatabase db,
int
oldVersion,
int
newVersion) {
59
db.execSQL(
"
DROP TABLE IF EXISTS
"
+
TB_NAME);
60
db.execSQL(
"
DROP TABLE IF EXISTS
"
+
TB_ADDRESS);
61
onCreate(db);
62
}
63
64
}
65
3.データベースの操作を行うDatabaseSerivceクラス.
1
package
com.diandianmi.service;
2
3
import
java.io.ByteArrayInputStream;
4
import
java.io.ByteArrayOutputStream;
5
import
java.sql.Timestamp;
6
7
import
com.diandianmi.model.UserInfo;
8
import
com.diandianmi.model.UserInfoList;
9
10
import
android.content.ContentValues;
11
import
android.content.Context;
12
import
android.database.Cursor;
13
import
android.database.sqlite.SQLiteDatabase;
14
import
android.graphics.Bitmap;
15
import
android.graphics.BitmapFactory;
16
17
public
class
DataBaseService {
18
private
static
String DB_NAME
=
"
diandianmi.db
"
;
19
private
static
int
DB_VERSION
=
1
;
20
private
SQLiteDatabase db;
21
private
SqliteHelper dbHelper;
22
23
public
DataBaseService(Context context){
//
， 。
24
dbHelper
=
new
SqliteHelper(context,DB_NAME,
null
,DB_VERSION);
25
db
=
dbHelper.getWritableDatabase();
26
}
27
28
public
void
close(){
//
29
db.close();
30
dbHelper.close();
31
}
32
33
public
UserInfoList getUserInfo(){
//
34
UserInfoList userList
=
new
UserInfoList();
35
36
Cursor cursor
=
db.query(SqliteHelper.TB_NAME,
null
,
null
,
null
,
null
,
null
, UserInfo.ID
+
"
DESC
"
);
37
38
cursor.moveToFirst();
39
while
(
!
cursor.isAfterLast()
&&
(cursor.getString(
2
)
!=
null
)){
40
UserInfo user
=
new
UserInfo();
41
user.setId(cursor.getInt(
0
));
42
user.setUserId(cursor.getString(
1
));
43
user.setName(cursor.getString(
2
));
44
user.setNickname(cursor.getString(
3
));
45
user.setPassword(cursor.getString(
4
));
46
user.setSex(cursor.getString(
5
));
47
user.setEmail(cursor.getString(
6
));
48
user.setTelephone(cursor.getString(
7
));
49
user.setCellphone(cursor.getString(
8
));
50
user.setConstellation(cursor.getString(
9
));
51
user.setBloodType(cursor.getString(
10
));
52
user.setHonor(cursor.getInt(
11
));
53
user.setHonesty(cursor.getInt(
12
));
54
user.setMoney(cursor.getInt(
13
));
55
user.setHobby(cursor.getString(
14
));
56
user.setRegisterTime(Timestamp.valueOf(cursor.getString(
15
)));
57
ByteArrayInputStream stream
=
new
ByteArrayInputStream(cursor.getBlob(
16
));
58
//
user.setIcon(Drawable.createFromStream(stream,"image"));
59
user.setIcon(BitmapFactory.decodeStream(stream));
60
61
userList.add(user);
62
cursor.moveToNext();
63
}
64
65
cursor.close();
66
67
return
userList;
68
}
69
70
public
Boolean haveUserInfo(String userid){
//
Id 。
71
Boolean flag
=
false
;
72
Cursor cursor
=
db.query(SqliteHelper.TB_NAME,
null
,UserInfo.USERID
+
"
=
"
+
userid,
null
,
null
,
null
,
null
);
73
flag
=
cursor.moveToFirst();
74
cursor.close();
75
return
flag;
76
}
77
78
public
Boolean haveUser(String userName,String password){
//
79
Boolean flag
=
false
;
80
Cursor cursor
=
db.query(SqliteHelper.TB_NAME,
null
,UserInfo.NAME
+
"
='
"
+
userName
+
"
' and
"
+
UserInfo.PASSWORD
+
"
='
"
+
password
+
"
'
"
,
null
,
null
,
null
,
null
);
81
flag
=
cursor.moveToFirst();
82
cursor.close();
83
return
flag;
84
}
85
86
public
int
updateUserIcon(Bitmap userIcon,String userid){
//
87
ContentValues values
=
new
ContentValues();
88
//
values.put(UserInfo.NAME, name);
89
final
ByteArrayOutputStream os
=
new
ByteArrayOutputStream();
90
userIcon.compress(Bitmap.CompressFormat.PNG,
100
, os);
91
values.put(UserInfo.ICON,os.toByteArray());
92
int
id
=
db.update(SqliteHelper.TB_NAME, values, UserInfo.ID
+
"
=
"
+
userid,
null
);
93
return
id;
94
}
95
96
public
int
updateUserInfo(UserInfo user){
//
97
ContentValues values
=
new
ContentValues();
98
values.put(UserInfo.USERID, user.getUserId());
99
values.put(UserInfo.NAME, user.getName());
100
values.put(UserInfo.NICKNAME, user.getNickname());
101
values.put(UserInfo.PASSWORD, user.getPassword());
102
values.put(UserInfo.SEX, user.getSex());
103
values.put(UserInfo.EMAIL, user.getEmail());
104
values.put(UserInfo.TELEPHONE, user.getTelephone());
105
values.put(UserInfo.CELLPHONE, user.getCellphone());
106
values.put(UserInfo.CONSTELLATION, user.getConstellation());
107
values.put(UserInfo.BLOODTYPE, user.getBloodType());
108
values.put(UserInfo.HONOR, user.getHonor());
109
values.put(UserInfo.HONESTY, user.getHonesty());
110
values.put(UserInfo.MONEY,user.getMoney());
111
values.put(UserInfo.HOBBY, user.getHobby());
112
values.put(UserInfo.REGISTERTIME, user.getRegisterTime()
+
""
);
113
114
int
id
=
db.update(SqliteHelper.TB_NAME, values, UserInfo.ID
+
"
=
"
+
user.getId(),
null
);
115
116
return
id;
117
}
118
119
public
Long addUser(UserInfo user){
//
120
ContentValues values
=
new
ContentValues();
121
values.put(UserInfo.USERID, user.getUserId());
122
values.put(UserInfo.NAME, user.getName());
123
values.put(UserInfo.NICKNAME, user.getNickname());
124
values.put(UserInfo.PASSWORD, user.getPassword());
125
values.put(UserInfo.SEX, user.getSex());
126
values.put(UserInfo.EMAIL, user.getEmail());
127
values.put(UserInfo.TELEPHONE, user.getTelephone());
128
values.put(UserInfo.CELLPHONE, user.getCellphone());
129
values.put(UserInfo.CONSTELLATION, user.getConstellation());
130
values.put(UserInfo.BLOODTYPE, user.getBloodType());
131
values.put(UserInfo.HONOR, user.getHonor());
132
values.put(UserInfo.HONESTY, user.getHonesty());
133
values.put(UserInfo.MONEY,user.getMoney());
134
values.put(UserInfo.HOBBY, user.getHobby());
135
values.put(UserInfo.REGISTERTIME, user.getRegisterTime()
+
""
);
136
if
(user.getIcon()
!=
null
){
137
final
ByteArrayOutputStream os
=
new
ByteArrayOutputStream();
138
user.getIcon().compress(Bitmap.CompressFormat.PNG,
100
, os);
139
values.put(UserInfo.ICON,os.toByteArray());
140
}
141
142
//
user.getIcon()
143
Long id
=
db.insert(SqliteHelper.TB_NAME, UserInfo.ID, values);
144
return
id;
145
}
146
147
public
int
delUser(String userId){
//
148
int
id
=
db.delete(SqliteHelper.TB_NAME, UserInfo.USERID
+
"
=
"
+
userId,
null
);
149
return
id;
150
}
151
}
152
クエリー・メソッドでCursorオブジェクトを返します.AndroidのCursorはJDBCのResultSetに似ています.