ContentProvider实现流程
2024-06-08 19:36:19
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1 public class DataBaseContentProvider extends ContentProvider {
2
3 private SQLiteOpenHelper mSQLiteOpenHelper;
4
5 private SQLiteDatabase db;
6 /**
7 * URI
8 */
9 private static final UriMatcher URIMATCHER = new UriMatcher(
10 UriMatcher.NO_MATCH);
11
12 private static final int URI_MATCH_USER = 0;
13
14 private static final int URI_MATCH_FRIEND = 1;
15
16 private static final int URI_MATCH_TALK = 2;
17
18 private static final int URI_MATCH_COMMENT = 3;
19
20 private static final int URI_MATCH_ALARM = 4;
21
22 static {
23 URIMATCHER.addURI(Constants.AUTHORITY, FriendTable.TABLE_NAME,
24 URI_MATCH_FRIEND);
25
26 URIMATCHER.addURI(Constants.AUTHORITY, UserTable.TABLE_NAME,
27 URI_MATCH_USER);
28
29 URIMATCHER.addURI(Constants.AUTHORITY, TalkTable.TABLE_NAME,
30 URI_MATCH_TALK);
31
32 URIMATCHER.addURI(Constants.AUTHORITY, CommentTable.TABLE_NAME,
33 URI_MATCH_COMMENT);
34
35 URIMATCHER.addURI(Constants.AUTHORITY,AlarmTable.TABLE_NAME,
36 URI_MATCH_ALARM);
37
38 }
39
40 @Override
41 public boolean onCreate() {
42 // TODO Auto-generated method stub
43 mSQLiteOpenHelper = DataBaseHelper.getInstance(getContext());
44 db = mSQLiteOpenHelper.getWritableDatabase();
45 return true;
46 }
47
48 /**
49 * 返回要查询的表名
50 */
51 private String getTableNameByUri(Uri uri) {
52 if (uri == null) {
53 return null;
54 }
55 int match = URIMATCHER.match(uri);
56 switch (match) {
57 case URI_MATCH_USER:
58 return UserTable.TABLE_NAME;
59
60 case URI_MATCH_FRIEND:
61 return FriendTable.TABLE_NAME;
62
63 case URI_MATCH_TALK:
64 return TalkTable.TABLE_NAME;
65
66 case URI_MATCH_COMMENT:
67 return CommentTable.TABLE_NAME;
68
69 case URI_MATCH_ALARM:
70 return AlarmTable.TABLE_NAME;
71
72 default:
73 throw new IllegalArgumentException(
74 "DataBaseContentProvider getTableNameByUri");
75 }
76 }
77
78 @Override
79 public int delete(Uri url, String where, String[] whereArgs) {
80 // TODO Auto-generated method stub
81 int match = URIMATCHER.match(url);
82 if (match == UriMatcher.NO_MATCH) {
83 throw new IllegalArgumentException("Unknown URL");
84 }
85
86 int count = db.delete(getTableNameByUri(url), where, whereArgs);
87 ContentResolver cr = getContext().getContentResolver();
88 cr.notifyChange(url, null);
89 return count;
90 }
91
92 @Override
93 public String getType(Uri arg0) {
94 // TODO Auto-generated method stub
95
96 switch (URIMATCHER.match(arg0)) {
97 case URI_MATCH_USER:
98 return UserTable.CONTENT_TYPE;
99 case URI_MATCH_FRIEND:
100 return FriendTable.CONTENT_TYPE;
101 case URI_MATCH_TALK:
102 return TalkTable.CONTENT_TYPE;
103 case URI_MATCH_COMMENT:
104 return CommentTable.CONTENT_TYPE;
105 case URI_MATCH_ALARM:
106 return AlarmTable.CONTENT_TYPE;
107 default:
108 throw new IllegalArgumentException(
109 "DataBaseContentProvider getType");
110 }
111 }
112
113 @Override
114 public Uri insert(Uri uri, ContentValues values) {
115 // TODO Auto-generated method stub
116
117 int match = URIMATCHER.match(uri);
118 Uri rtUri = null;
119 long rowId = db.replace(getTableNameByUri(uri), null, values);
120 if (rowId > 0) {
121 rtUri = ContentUris.withAppendedId(uri, rowId);
122 }
123 ContentResolver cr = getContext().getContentResolver();
124 cr.notifyChange(uri, null);
125 return rtUri;
126 }
127
128 @Override
129 public Cursor query(Uri uri, String[] projection, String selection,
130 String[] selectionArgs, String sortOrder) {
131 // TODO Auto-generated method stub
132 String tableName = this.getTableNameByUri(uri);
133 Cursor c = db.query(tableName, projection, selection, selectionArgs,
134 null, null, sortOrder, null);
135 c.setNotificationUri(getContext().getContentResolver(), uri);
136 return c;
137 }
138
139 @Override
140 public int update(Uri uri, ContentValues values, String selection,
141 String[] selectionArgs) {
142 // TODO Auto-generated method stub
143 String tableName = this.getTableNameByUri(uri);
144 int rt = db.update(tableName, values, selection, selectionArgs);
145 ContentResolver cr = getContext().getContentResolver();
146 cr.notifyChange(uri, null);
147 return rt;
148 }
149
150 }View Code
<provider android:name="com.winning.cqs.pregnantbabycare_cqs_v1.db.DataBaseContentProvider"android:authorities="com.winning.cqs.pregnantbabycare_cqs_v1"android:multiprocess="true" > </provider>
View Code
public class User implements Serializable {private static final long serialVersionUID = 1L;public int _id;public String hospitalHost;public String hospitalName;public String lastModify;public String idNo;public String mobile;public String name;public String hospitalCode;public String dueDate;public Integer activity;public Integer yxtUserID;public String nick;public String cardTypeDis;public Integer hospitalID;public int id;public Integer yxtMemberID;public Integer defaultPatientID;public String address;public Integer lastPregnancyID;public String createDate;public String cardNo;public String medicalNo;public Integer patientID;public static String saveUserToDB(ContentResolver cr, User user) {if (null == cr || null == user) {return null;}String result = null;//获取到还没有被修改过的用户信息User user2 = getUsers(cr, String.valueOf(user.id));ContentValues values = new ContentValues();values.put(UserTable.Activity, user.activity);values.put(UserTable.Address, user.address);values.put(UserTable.CardNo, user.cardNo);values.put(UserTable.CardTypeDis, user.cardTypeDis);values.put(UserTable.CreateDate, user.createDate);values.put(UserTable.DefaultPatientID, user.defaultPatientID);values.put(UserTable.DueDate, user.dueDate);values.put(UserTable.HospitalCode, user.hospitalCode);values.put(UserTable.HospitalHost, user.hospitalHost);values.put(UserTable.HospitalID, user.hospitalID);values.put(UserTable.HospitalName, user.hospitalName);values.put(UserTable.Id, user.id);values.put(UserTable.IdNo, user.idNo);values.put(UserTable.LastModify, user.lastModify);values.put(UserTable.LastPregnancyID, user.lastPregnancyID);values.put(UserTable.MedicalNo, user.medicalNo);values.put(UserTable.Mobile, user.mobile);values.put(UserTable.Name, user.name);values.put(UserTable.Nick, user.nick);values.put(UserTable.PatientID, user.patientID);values.put(UserTable.YxtMemberID, user.yxtMemberID);values.put(UserTable.YxtUserID, user.yxtUserID);if (values.size() > 0) {String whereStr = UserTable.Id + " = " + user.id;// 查询是否有相同数据Cursor cursor = cr.query(UserTable.CONTENT_URI, null, whereStr,null, null);if ((null != cursor) && (0 < cursor.getCount())) {cr.update(UserTable.CONTENT_URI, values, whereStr, null);} else {cr.insert(UserTable.CONTENT_URI, values);}if (cursor != null) {cursor.close();}}if (isUpdate(user, user2))result = "信息保存成功！";return result;}/*** 判断用户信息是否被修改* @param user1* @param user2* @return*/public static boolean isUpdate(User user1, User user2) {boolean b = true;if (user1 == null || user2 == null) {return b;}if (user1.id == user2.id && user1.nick.equals(user2.nick)&& user1.dueDate.equals(user2.dueDate)) {b = false;}return b;}public static User getUsers(ContentResolver cr, String id) {User friend = null;if (null != cr) {Cursor cursor = cr.query(UserTable.CONTENT_URI, null, UserTable.Id+ "=?", new String[] { id }, null);if (cursor.moveToFirst()) {friend = new User();friend._id = cursor.getInt(cursor.getColumnIndex(UserTable._ID));friend.activity = cursor.getInt(cursor.getColumnIndex(UserTable.Activity));friend.address = cursor.getString(cursor.getColumnIndex(UserTable.Address));friend.cardNo = cursor.getString(cursor.getColumnIndex(UserTable.CardNo));friend.cardTypeDis = cursor.getString(cursor.getColumnIndex(UserTable.CardTypeDis));friend.createDate = cursor.getString(cursor.getColumnIndex(UserTable.CreateDate));friend.defaultPatientID = cursor.getInt(cursor.getColumnIndex(UserTable.DefaultPatientID));friend.dueDate = cursor.getString(cursor.getColumnIndex(UserTable.DueDate));friend.hospitalCode = cursor.getString(cursor.getColumnIndex(UserTable.HospitalCode));friend.hospitalHost = cursor.getString(cursor.getColumnIndex(UserTable.HospitalHost));friend.hospitalID = cursor.getInt(cursor.getColumnIndex(UserTable.HospitalID));friend.hospitalName = cursor.getString(cursor.getColumnIndex(UserTable.HospitalName));friend.id = cursor.getInt(cursor.getColumnIndex(UserTable.Id));friend.idNo = cursor.getString(cursor.getColumnIndex(UserTable.IdNo));friend.lastModify = cursor.getString(cursor.getColumnIndex(UserTable.LastModify));friend.lastPregnancyID = cursor.getInt(cursor.getColumnIndex(UserTable.LastPregnancyID));friend.medicalNo = cursor.getString(cursor.getColumnIndex(UserTable.MedicalNo));friend.mobile = cursor.getString(cursor.getColumnIndex(UserTable.Mobile));friend.name = cursor.getString(cursor.getColumnIndex(UserTable.Name));friend.nick = cursor.getString(cursor.getColumnIndex(UserTable.Nick));friend.patientID = cursor.getInt(cursor.getColumnIndex(UserTable.PatientID));friend.yxtMemberID = cursor.getInt(cursor.getColumnIndex(UserTable.YxtMemberID));friend.yxtUserID = cursor.getInt(cursor.getColumnIndex(UserTable.YxtUserID));cursor.moveToNext();cursor.close();}}return friend;}public static ArrayList<User> getAllUsers(ContentResolver cr) {ArrayList<User> users = new ArrayList<User>();if (null != cr) {Cursor cursor = cr.query(UserTable.CONTENT_URI, null, null, null,null);if (null != cursor) {int friendsCount = cursor.getCount();cursor.moveToFirst();for (int k = 0; k < friendsCount; k++) {User friend = new User();friend._id = cursor.getInt(cursor.getColumnIndex(UserTable._ID));friend.activity = cursor.getInt(cursor.getColumnIndex(UserTable.Activity));friend.address = cursor.getString(cursor.getColumnIndex(UserTable.Address));friend.cardNo = cursor.getString(cursor.getColumnIndex(UserTable.CardNo));friend.cardTypeDis = cursor.getString(cursor.getColumnIndex(UserTable.CardTypeDis));friend.createDate = cursor.getString(cursor.getColumnIndex(UserTable.CreateDate));friend.defaultPatientID = cursor.getInt(cursor.getColumnIndex(UserTable.DefaultPatientID));friend.dueDate = cursor.getString(cursor.getColumnIndex(UserTable.DueDate));friend.hospitalCode = cursor.getString(cursor.getColumnIndex(UserTable.HospitalCode));friend.hospitalHost = cursor.getString(cursor.getColumnIndex(UserTable.HospitalHost));friend.hospitalID = cursor.getInt(cursor.getColumnIndex(UserTable.HospitalID));friend.hospitalName = cursor.getString(cursor.getColumnIndex(UserTable.HospitalName));friend.id = cursor.getInt(cursor.getColumnIndex(UserTable.Id));friend.idNo = cursor.getString(cursor.getColumnIndex(UserTable.IdNo));friend.lastModify = cursor.getString(cursor.getColumnIndex(UserTable.LastModify));friend.lastPregnancyID = cursor.getInt(cursor.getColumnIndex(UserTable.LastPregnancyID));friend.medicalNo = cursor.getString(cursor.getColumnIndex(UserTable.MedicalNo));friend.mobile = cursor.getString(cursor.getColumnIndex(UserTable.Mobile));friend.name = cursor.getString(cursor.getColumnIndex(UserTable.Name));friend.nick = cursor.getString(cursor.getColumnIndex(UserTable.Nick));friend.patientID = cursor.getInt(cursor.getColumnIndex(UserTable.PatientID));friend.yxtMemberID = cursor.getInt(cursor.getColumnIndex(UserTable.YxtMemberID));friend.yxtUserID = cursor.getInt(cursor.getColumnIndex(UserTable.YxtUserID));users.add(friend);cursor.moveToNext();}cursor.close();}}return users;}public static class UserTable implements BaseColumns {public static final String TABLE_NAME = "user";public static final Uri CONTENT_URI = Uri.parse("content://"+ Constants.AUTHORITY + "/" + TABLE_NAME);public static final String CONTENT_TYPE = "vnd.android.cursor.dir/"+ Constants.AUTHORITY + "/" + TABLE_NAME;public static final String _ID = "_id";public static final String HospitalHost = "hospitalHost";public static final String HospitalName = "hospitalName";public static final String LastModify = "lastModify";public static final String IdNo = "idNo";public static final String Mobile = "mobile";public static final String Name = "name";public static final String HospitalCode = "hospitalCode";public static final String DueDate = "dueDate";public static final String Activity = "activity";public static final String YxtUserID = "yxtUserID";public static final String Nick = "nick";public static final String CardTypeDis = "cardTypeDis";public static final String HospitalID = "hospitalID";public static final String Id = "id";public static final String YxtMemberID = "yxtMemberID";public static final String DefaultPatientID = "defaultPatientID";public static final String Address = "address";public static final String LastPregnancyID = "lastPregnancyID";public static final String CreateDate = "createDate";public static final String CardNo = "cardNo";public static final String MedicalNo = "medicalNo";public static final String PatientID = "patientID";public static final String TABLE_CREATESQL = "CREATE TABLE "+ TABLE_NAME + " (" + "_id"+ " INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT," + HospitalHost+ " TEXT," + HospitalName + " TEXT," + LastModify + " TEXT,"+ IdNo + " TEXT," + Mobile + " TEXT," + Name + " TEXT,"+ HospitalCode + " TEXT," + DueDate + " TEXT," + Activity+ " TEXT," + YxtUserID + " TEXT," + Nick + " TEXT,"+ CardTypeDis + " TEXT," + HospitalID + " TEXT," + Id+ " TEXT," + YxtMemberID + " TEXT," + DefaultPatientID+ " TEXT," + Address + " TEXT," + LastPregnancyID + " TEXT,"+ CreateDate + " TEXT," + CardNo + " TEXT," + MedicalNo+ " TEXT," + PatientID + " INTEGER" + ");";}}View Code
转载于:https://www.cnblogs.com/LiuZhen/p/3581760.html
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