实验八:SQLite数据库操作

实验报告

课程名称

基于Android平台移动互联网开发

实验日期

2016年5月6日

实验项目名称

SQLite数据库操作

实验地点

S3010

实验类型

□验证型    √设计型    □综合型

学  时

2

一、实验目的及要求(本实验所涉及并要求掌握的知识点)

  1. 设计一个个人通讯录,掌握Android平台下的数据库开发,该个人通讯录主要包括联系人列表和联系人详细信息等界面;
  2. 程序主界面是通讯录的目录显示手机上联系人的名称。点击联系人的姓名可以显示联系人的详细信息。单击图标按钮可以添加联系人和删除联系人。

二、实验环境(本实验所使用的硬件设备和相关软件)

(1)PC机

(2)操作系统:Windows XP

(3)软件: Eclipse, JDK1.6,Android SDK,ADT

三、实验内容及步骤

(1)  确定数据库的数据结构。

(2)  新建工程,修改布局文件,定义字符串资源。

(3)  开发布局文件activity_main.xml用于显示联系人列表。

(4)  layout目录下新建一个detail.xml,用于显示联系人详细信息。

(5)  开发数据库辅助类MyOpenHelper类

(6)  DetailActivity端开发实现数据库增加、删除、修改记录等操作

(7)  新建Activity名为DetailActivity.java,实现联系人详细信息显示功能。

四、实验结果(本实验源程序清单及运行结果或实验结论、实验设计图)

 

代码:

 MainActivity代码:

 1 public class MainActivity extends Activity {
 2     Button btnadd, btndel;
 3     Intent it = new Intent();
 4     ListView listview;
 5     UserSQL usersql;
 6     SQLiteDatabase userdatabases;
 7     ArrayList<HashMap<String, Object>> userlist;
 8     String[] name=new String[100];
 9 
10     @Override
11     protected void onCreate(Bundle savedInstanceState) {
12         super.onCreate(savedInstanceState);
13         setContentView(R.layout.activity_main);
14         btnadd = (Button) findViewById(R.id.add);
15         btndel = (Button) findViewById(R.id.delete);
16         listview = (ListView) findViewById(R.id.listView1);
17         usersql = new UserSQL(MainActivity.this, "user.db", null, 1);
18         userdatabases = usersql.getReadableDatabase();
19         userlist = new ArrayList<HashMap<String, Object>>();
20         Cursor cursor = userdatabases.rawQuery("select * from userTable", null);
21         cursor.moveToFirst();
22         if (cursor.getCount() > 0) {
23             for (int i = 0; i < cursor.getCount(); i++) {
24                 HashMap<String, Object> hashmap = new HashMap<String, Object>();
25                 hashmap.put("name",
26                         cursor.getString(cursor.getColumnIndex("name")));
27                 name[i]=cursor.getString(cursor.getColumnIndex("name"));
28                 hashmap.put("phone",
29                         "["+cursor.getString(cursor.getColumnIndex("phone"))+"]");
30                 userlist.add(hashmap);
31                 if (i < cursor.getCount()) {
32                     cursor.moveToNext();
33                 }
34             }
35             SimpleAdapter sa = new SimpleAdapter(MainActivity.this, userlist,
36                     R.layout.userlist, new String[] { "name", "phone" }, new int[] {
37                             R.id.namelist, R.id.phonelist });
38             listview.setAdapter(sa);
39         }
40         listview.setOnItemClickListener(new OnItemClickListener() {
41 
42             @Override
43             public void onItemClick(AdapterView<?> parent, View view,
44                     int position, long id) {
45                 // TODO Auto-generated method stub
46                 Intent intent=new Intent(MainActivity.this,DetailActivity.class);
47                 Bundle bd=new Bundle();
48                 bd.putString("name", name[position]);
49             
50                 intent.putExtras(bd);
51                 startActivity(intent);
52             }
53         });
54         btnadd.setOnClickListener(new OnClickListener() {
55 
56             @Override
57             public void onClick(View v) {
58                 // TODO Auto-generated method stub
59                 it.setClass(MainActivity.this, DetailActivity.class);
60                 Bundle bd=new Bundle();
61                 bd.putString("name", "");
62                 
63                 it.putExtras(bd);
64                 startActivity(it);
65 
66             }
67         });
68         btndel.setOnClickListener(new OnClickListener() {
69             
70             @Override
71             public void onClick(View v) {
72                 // TODO Auto-generated method stub
73                 it.setClass(MainActivity.this, DeleteActivity.class);
74                 startActivity(it);
75             }
76         });
77     }
78 
79     @Override
80     public boolean onCreateOptionsMenu(Menu menu) {
81         // Inflate the menu; this adds items to the action bar if it is present.
82         getMenuInflater().inflate(R.menu.main, menu);
83         return true;
84     }
85 
86 }

DetailActivity代码:

  1 public class DetailActivity extends Activity {
  2     EditText edname, edphone, edmobile, edemail, edpost, edaddr, edcomp;
  3     String name, phone, mobile, email, post, addr, comp;
  4     Button btnadd;
  5     UserSQL usersql;
  6     SQLiteDatabase userdatabase;
  7     Bundle bd;
  8     String selectname;
  9 
 10     protected void onCreate(Bundle savedInstanceState) {
 11         super.onCreate(savedInstanceState);
 12         setContentView(R.layout.detail);
 13         btnadd = (Button) findViewById(R.id.deadd);
 14         edname = (EditText) findViewById(R.id.edname);
 15         edphone = (EditText) findViewById(R.id.edphone);
 16         edmobile = (EditText) findViewById(R.id.edmoblie);
 17         edemail = (EditText) findViewById(R.id.edemail);
 18         edpost = (EditText) findViewById(R.id.edpost);
 19         edaddr = (EditText) findViewById(R.id.edaddr);
 20         edcomp = (EditText) findViewById(R.id.edcomp);
 21         usersql = new UserSQL(DetailActivity.this, "user.db", null, 1);
 22         userdatabase = usersql.getReadableDatabase();
 23         bd = getIntent().getExtras();
 24         if (!bd.getString("name").equals("")) {
 25             selectname = bd.getString("name");
 26             Cursor cursor = userdatabase.rawQuery(
 27                     "select * from userTable where name=?",
 28                     new String[] { selectname });
 29             cursor.moveToFirst();
 30             edname.setText(cursor.getString(cursor.getColumnIndex("name")));
 31             edphone.setText(cursor.getString(cursor.getColumnIndex("phone")));
 32             edmobile.setText(cursor.getString(cursor.getColumnIndex("mobile")));
 33             edemail.setText(cursor.getString(cursor.getColumnIndex("email")));
 34             edpost.setText(cursor.getString(cursor.getColumnIndex("post")));
 35             edaddr.setText(cursor.getString(cursor.getColumnIndex("addr")));
 36             edcomp.setText(cursor.getString(cursor.getColumnIndex("comp")));
 37             btnadd.setText("刷新联系人");
 38         }
 39         btnadd.setOnClickListener(new OnClickListener() {
 40 
 41             @Override
 42             public void onClick(View v) {
 43                 // TODO Auto-generated method stub
 44                 name = edname.getText().toString();
 45                 phone = edphone.getText().toString();
 46                 mobile = edmobile.getText().toString();
 47                 email = edemail.getText().toString();
 48                 post = edpost.getText().toString();
 49                 addr = edaddr.getText().toString();
 50                 comp = edcomp.getText().toString();
 51 
 52                 if (!name.equals("") && !phone.equals("") && !mobile.equals("")
 53                         && !email.equals("") && !post.equals("")
 54                         && !addr.equals("") && !comp.equals("")) {
 55 
 56                     Cursor cursor = userdatabase.rawQuery(
 57                             "select * from userTable where name=?",
 58                             new String[] { name });
 59                     cursor.moveToFirst();
 60                     ContentValues cv = new ContentValues();
 61                     cv.put("name", name);
 62                     cv.put("phone", phone);
 63                     cv.put("mobile", mobile);
 64                     cv.put("email", email);
 65                     cv.put("post", post);
 66                     cv.put("addr", addr);
 67                     cv.put("comp", comp);
 68                     if (cursor.getCount() <= 0) {
 69                         userdatabase.insert("userTable", null, cv);
 70                         cv.clear();
 71                         Toast.makeText(DetailActivity.this, "保存" + name + "成功",
 72                                 Toast.LENGTH_LONG).show();
 73                         userdatabase.delete("userTable", "name=?",
 74                                 new String[] { selectname });
 75 
 76                         Intent it = new Intent();
 77                         it.setClass(DetailActivity.this, MainActivity.class);
 78                         startActivity(it);
 79                         finish();
 80                     } else if (cursor.getCount() == 1
 81                             && cursor.getString(cursor.getColumnIndex("name"))
 82                                     .equals(selectname)) {
 83                         userdatabase.update("userTable", cv, "name=?",
 84                                 new String[] { selectname });
 85                         cv.clear();
 86                         Toast.makeText(DetailActivity.this, "刷新联系人" + name + "成功",
 87                                 Toast.LENGTH_LONG).show();
 88                         Intent it = new Intent();
 89                         it.setClass(DetailActivity.this, MainActivity.class);
 90                         startActivity(it);
 91                         finish();
 92                     } else {
 93 
 94                         Toast.makeText(DetailActivity.this, name + "已被注册",
 95                                 Toast.LENGTH_LONG).show();
 96                     }
 97                 } else {
 98                     Toast.makeText(DetailActivity.this, "信息填写不完整",
 99                             Toast.LENGTH_LONG).show();
100                 }
101             }
102 
103         });
104     }
105 }

 

运行结果:(截图)

 

 

五、实验总结(对本实验结果进行分析,实验心得体会及改进意见)

    经过本次实验,对于数据库数据的新增、删除等有了一定的了解,经过同学讨论以及参考老师所给的材料,再加上结合老师上课讲的重点难点,大概能够完成,但依然存在一些小问题。

实验评语

 

实验成绩

 

指导教师签名:              年   月   日

           

 

posted @ 2016-05-12 23:26  11朱昇杰  阅读(1630)  评论(0编辑  收藏  举报