1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:tools="http://schemas.android.com/tools"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent"
 6     android:paddingBottom="@dimen/activity_vertical_margin"
 7     android:paddingLeft="@dimen/activity_horizontal_margin"
 8     android:paddingRight="@dimen/activity_horizontal_margin"
 9     android:paddingTop="@dimen/activity_vertical_margin"
10     tools:context="com.hanqi.contacts.MainActivity"
11     android:orientation="vertical">
12 
13     <ListView
14         android:layout_width="match_parent"
15         android:layout_height="0dp"
16         android:layout_weight="1"
17         android:id="@+id/lv_1">
18     </ListView>
19     <Button
20         android:layout_width="match_parent"
21         android:layout_height="wrap_content"
22         android:text="添加通讯录名单"
23         android:onClick="add_onClick"/>
24 </LinearLayout>
activity_main
 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="horizontal"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent">
 6 
 7     <TextView
 8         android:layout_width="0dp"
 9         android:layout_height="wrap_content"
10         android:layout_weight="1"
11         android:id="@+id/tv_1"
12         android:textSize="30dp"
13         android:height="40dp"/>
14     <TextView
15         android:layout_width="0dp"
16         android:layout_height="wrap_content"
17         android:layout_weight="1"
18         android:id="@+id/tv_2"
19         android:textSize="30dp"
20         android:height="40dp"/>
21 </LinearLayout>
contact1_layout
 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent">
 6 
 7     <EditText
 8         android:layout_width="match_parent"
 9         android:layout_height="wrap_content"
10         android:hint="请输入姓名"
11         android:id="@+id/et_1"/>
12     <EditText
13         android:layout_width="match_parent"
14         android:layout_height="wrap_content"
15         android:hint="请输入电话号码"
16         android:inputType="number"
17         android:id="@+id/et_2"/>
18 </LinearLayout>
contact_layout
 1 package com.hanqi.contacts.com.hanqi.contacts.orm;
 2 
 3 /**
 4  * Created by lenovo on 2016/6/8.
 5  */
 6 public class Contacts {
 7 
 8     private long id;
 9     private String name;
10     private String phoneNumber;
11 
12     public long getId() {
13         return id;
14     }
15 
16     public void setId(long id) {
17         this.id = id;
18     }
19 
20     public String getName() {
21         return name;
22     }
23 
24     public void setName(String name) {
25         this.name = name;
26     }
27 
28     public String getPhoneNumber() {
29         return phoneNumber;
30     }
31 
32     public void setPhoneNumber(String phoneNumber) {
33         this.phoneNumber = phoneNumber;
34     }
35 
36     public Contacts(long id, String name, String phoneNumber) {
37         this.id = id;
38         this.name = name;
39         this.phoneNumber = phoneNumber;
40     }
41 
42     public Contacts(String name,String phoneNumber) {
43         this.name = name;
44         this.phoneNumber = phoneNumber;
45     }
46 }
Contacts
 1 package com.hanqi.contacts.com.hanqi.contacts.orm;
 2 
 3 import android.content.Context;
 4 import android.database.sqlite.SQLiteDatabase;
 5 import android.database.sqlite.SQLiteOpenHelper;
 6 import android.util.Log;
 7 
 8 /**
 9  * Created by lenovo on 2016/6/8.
10  */
11 public class CTHelper extends SQLiteOpenHelper {
12     public CTHelper(Context context) {
13         super(context, "contacts.db", null, 1);
14     }
15 
16     @Override
17     public void onCreate(SQLiteDatabase db) {
18         //1.执行创建数据库的语句
19         String sql = "CREATE TABLE t_contacts " +
20                 "(_id  INTEGER NOT NULL," +
21                 "name  VARCHAR(20) NOT NULL,"
22                 +"phone_number  VARCHAR(20) NOT NULL,"
23                 +"PRIMARY KEY (\"_id\"))";
24         db.execSQL(sql);
25         Log.e("TAG", "表创建成功");
26     }
27 
28     @Override
29     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
30 
31     }
32 }
CTHelper
 1 package com.hanqi.contacts.com.hanqi.contacts.orm;
 2 
 3 import android.content.ContentValues;
 4 import android.content.Context;
 5 import android.database.Cursor;
 6 import android.database.sqlite.SQLiteDatabase;
 7 
 8 import java.util.ArrayList;
 9 
10 /**
11  * Created by lenovo on 2016/6/8.
12  */
13 public class ContactsDAO {
14     private final String TABLE_NAME = "t_contacts";
15     private CTHelper ch;
16 
17     public ContactsDAO(Context context)
18     {
19         ch = new CTHelper(context);
20     }
21     //增
22     public long insert(Contacts contacts)
23     {
24         long rtn = 0;
25         SQLiteDatabase sd = ch.getWritableDatabase();
26         //insert into t_contacts (phoneNumber) values()
27         ContentValues cv = new ContentValues();
28         cv.put("name",contacts.getName());
29         cv.put("phone_number",contacts.getPhoneNumber());
30         rtn = sd.insert("t_contacts",null,cv);
31         sd.close();
32         return rtn;
33     }
34     //删
35     public int delete(long id)
36     {
37         int rtn = 0;
38         //delete from t_contacts where = ?
39         SQLiteDatabase sd = ch.getWritableDatabase();
40         rtn = sd.delete(TABLE_NAME,"_id = ?",new String[]{id+""});
41         sd.close();
42         return rtn;
43     }
44     //改
45     public int update(Contacts contacts)
46     {
47         int rtn = 0;
48         //update t_contacts set phone_number = ? and name = ? where id = ?
49         SQLiteDatabase sd = ch.getWritableDatabase();
50         ContentValues cv = new ContentValues();
51         cv.put("name",contacts.getName());
52         cv.put("phone_number",contacts.getPhoneNumber());
53         rtn = sd.update(TABLE_NAME,cv,"_id = ?",new String[]{contacts.getId()+""});
54         sd.close();
55         return rtn;
56     }
57     //查
58     public ArrayList<Contacts> getAll()
59     {
60         //select * from t_contacts
61         //查询之后得到游标结果集
62         ArrayList<Contacts> contacts = new ArrayList<>();
63         SQLiteDatabase sd = ch.getWritableDatabase();
64         Cursor cursor = sd.query(TABLE_NAME, null, null, null, null, null, "_id desc");
65         while (cursor.moveToNext())
66         {
67             Contacts contacts1 = new Contacts(cursor.getLong(0),cursor.getString(1),cursor.getString(2));
68             contacts.add(contacts1);
69         }
70         cursor.close();
71         sd.close();
72         return contacts;
73     }
74 }
ContactsDAO
  1 package com.hanqi.contacts;
  2 
  3 import android.app.AlertDialog;
  4 import android.content.DialogInterface;
  5 import android.os.Bundle;
  6 import android.support.v7.app.AppCompatActivity;
  7 import android.view.ContextMenu;
  8 import android.view.MenuItem;
  9 import android.view.View;
 10 import android.view.ViewGroup;
 11 import android.widget.AdapterView;
 12 import android.widget.BaseAdapter;
 13 import android.widget.EditText;
 14 import android.widget.ListView;
 15 import android.widget.TextView;
 16 import android.widget.Toast;
 17 
 18 import com.hanqi.contacts.com.hanqi.contacts.orm.Contacts;
 19 import com.hanqi.contacts.com.hanqi.contacts.orm.ContactsDAO;
 20 
 21 import java.util.ArrayList;
 22 
 23 public class MainActivity extends AppCompatActivity {
 24     ListView lv_1;
 25     ContactsDAO ctd = new ContactsDAO(this);
 26     ArrayList<Contacts> act;
 27     CTAdapter cta;
 28     //长按数据的索引
 29     int index;
 30 
 31     @Override
 32     protected void onCreate(Bundle savedInstanceState) {
 33         super.onCreate(savedInstanceState);
 34         setContentView(R.layout.activity_main);
 35 
 36         lv_1 = (ListView)findViewById(R.id.lv_1);
 37 
 38         lv_1.setOnCreateContextMenuListener(this);
 39         //获取数据集合
 40         act = ctd.getAll();
 41         //显示数据
 42         cta = new CTAdapter();
 43         lv_1.setAdapter(cta);
 44 
 45     }
 46     //重写创建上下文菜单的方法
 47     @Override
 48     public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
 49         super.onCreateContextMenu(menu, v, menuInfo);
 50         menu.add(0, 1, 1, "修改");
 51         menu.add(0, 2, 2, "删除");
 52         //获取长按的数据信息
 53         //1.得到菜单信息
 54         AdapterView.AdapterContextMenuInfo acmi =
 55                 (AdapterView.AdapterContextMenuInfo)menuInfo;
 56         //2.得到数据在集合中的索引
 57         index = acmi.position;
 58     }
 59     //响应菜单点击的回调方法
 60     @Override
 61     public boolean onContextItemSelected(MenuItem item) {
 62         switch (item.getItemId())
 63         {
 64             case 1:
 65                 final View view = View.inflate(this,R.layout.contact_layout,null);
 66                 new AlertDialog.Builder(this)
 67                         .setTitle("添加通讯录")
 68                         .setView(view)
 69                         .setCancelable(false)
 70                         .setNegativeButton("取消", null)
 71                         .setPositiveButton("确定", new DialogInterface.OnClickListener() {
 72                             @Override
 73                             public void onClick(DialogInterface dialog, int which) {
 74                                 EditText et_1 = (EditText)view.findViewById(R.id.et_1);
 75                                 EditText et_2 = (EditText)view.findViewById(R.id.et_2);
 76                                 Contacts contacts = act.get(index);
 77                                 contacts.setName(et_1.getText().toString());
 78                                 contacts.setPhoneNumber(et_2.getText().toString());
 79                                 if(ctd.update(contacts)>0)
 80                                 {
 81                                     Toast.makeText(MainActivity.this, "修改成功", Toast.LENGTH_SHORT).show();
 82                                     cta.notifyDataSetChanged();
 83                                 }
 84                                 else
 85                                 {
 86                                     Toast.makeText(MainActivity.this, "修改失败", Toast.LENGTH_SHORT).show();
 87                                 }
 88                             }
 89                         })
 90                         .show();
 91                 break;
 92             case 2:
 93                 new AlertDialog.Builder(this)
 94                         .setTitle("确认对话框")
 95                         .setCancelable(false)
 96                         .setNegativeButton("取消",null)
 97                         .setPositiveButton("确认", new DialogInterface.OnClickListener() {
 98                             @Override
 99                             public void onClick(DialogInterface dialog, int which) {
100                                 ctd.delete(act.get(index).getId());
101                                 Toast.makeText(MainActivity.this, "删除成功", Toast.LENGTH_SHORT).show();
102                                 act = ctd.getAll();
103                                 cta.notifyDataSetChanged();
104                             }
105                         })
106                         .show();
107                 break;
108         }
109         return super.onContextItemSelected(item);
110     }
111 
112     //BaseAdapter的实现类
113     class CTAdapter extends BaseAdapter
114     {
115         @Override
116         public int getCount() {
117             return act.size();
118         }
119 
120         @Override
121         public Object getItem(int position) {
122             return act.get(position);
123         }
124 
125         @Override
126         public long getItemId(int position) {
127             return act.get(position).getId();
128         }
129 
130         @Override
131         public View getView(int position, View convertView, ViewGroup parent) {
132             //得到数据
133             Contacts contacts = act.get(position);
134             //得到视图
135             if (convertView == null)
136             {
137                 convertView = View.inflate(MainActivity.this,R.layout.contact1_layout,null);
138             }
139             //视图和数据做显式匹配
140             TextView textView = (TextView)convertView.findViewById(R.id.tv_1);
141             textView.setText(contacts.getName());
142             TextView textView1 = (TextView)convertView.findViewById(R.id.tv_2);
143             textView1.setText(contacts.getPhoneNumber());
144             return convertView;
145         }
146     }
147     public void add_onClick(View v)
148     {
149         final View view = View.inflate(this,R.layout.contact_layout,null);
150         new AlertDialog.Builder(this)
151                 .setTitle("添加通讯录")
152                 .setView(view)
153                 .setCancelable(false)
154                 .setNegativeButton("取消", null)
155                 .setPositiveButton("保存", new DialogInterface.OnClickListener() {
156                     @Override
157                     public void onClick(DialogInterface dialog, int which) {
158                         EditText et_1 = (EditText)view.findViewById(R.id.et_1);
159                         EditText et_2 = (EditText)view.findViewById(R.id.et_2);
160                         Contacts contacts = new Contacts(et_1.getText().toString(), et_2.getText().toString());
161                         long l = ctd.insert(contacts);
162                         if (l > 0) {
163                             Toast.makeText(MainActivity.this, "保存成功", Toast.LENGTH_SHORT).show();
164                             act = ctd.getAll();
165                             cta.notifyDataSetChanged();
166                         } else {
167                             Toast.makeText(MainActivity.this, "保存失败", Toast.LENGTH_SHORT).show();
168                         }
169                     }
170                 })
171                 .show();
172     }
173 }
MainActivity