Android开始之数据存储

Android开始之数据存储—访问通讯录

通讯录：管理联系人

1.修改数据

2.访问数据

3.将数据放入适配器并显示

需要权限：

<uses-permission android:name="android.permission.WRITE_CONTACTS"/>
<uses-permission android:name="android.permission.READ_CONTACTS"/>

布局文件：TextView

在模拟器通讯录中创建一个联系人：

-------------------------------------------------------

 1 public class MainActivity extends ActionBarActivity implements
 2         LoaderCallbacks<Cursor> {
 3     private TextView textView;
 4     private LoaderManager manager;
 5 
 6     @Override
 7     protected void onCreate(Bundle savedInstanceState) {
 8         super.onCreate(savedInstanceState);
 9         setContentView(R.layout.fragment_main);
10         textView = (TextView) findViewById(R.id.mag);
11         manager = getLoaderManager();
12         manager.initLoader(1001, null, this);// 初始化
13 
14     }
15 
16     @Override
17     public boolean onCreateOptionsMenu(Menu menu) {
18 
19         // Inflate the menu; this adds items to the action bar if it is present.
20         getMenuInflater().inflate(R.menu.main, menu);
21         return true;
22     }
23 
24     @Override
25     public boolean onOptionsItemSelected(MenuItem item) {
26         // Handle action bar item clicks here. The action bar will
27         // automatically handle clicks on the Home/Up button, so long
28         // as you specify a parent activity in AndroidManifest.xml.
29         int id = item.getItemId();
30         if (id == R.id.action_settings) {
31             return true;
32         }
33         return super.onOptionsItemSelected(item);
34     }
35 
36     /**
37      * A placeholder fragment containing a simple view.
38      */
39     public static class PlaceholderFragment extends Fragment {
40 
41         public PlaceholderFragment() {
42         }
43 
44         @Override
45         public View onCreateView(LayoutInflater inflater, ViewGroup container,
46                 Bundle savedInstanceState) {
47             View rootView = inflater.inflate(R.layout.fragment_main, container,
48                     false);
49             return rootView;
50         }
51     }
52 
53     @Override
54     public Loader<Cursor> onCreateLoader(int id, Bundle args) {
55         // TODO Auto-generated method stub
56         Uri uri = ContactsContract.Contacts.CONTENT_URI;
57         CursorLoader loader = new CursorLoader(this, uri, null, null, null,
58                 null);
59 
60         return loader;
61     }
62 
63     @Override
64     public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
65         // TODO Auto-generated method stub
66         StringBuffer buffer = new StringBuffer();
67         while (data.moveToNext()) {
68             int nameindex = data
69                     .getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME);
70             String dispaly_name = data.getString(nameindex);
71             buffer.append("name: " + dispaly_name+" Tel :");
72             // 获得通讯录每一条记录的ID
73             int _id = data.getInt(data
74                     .getColumnIndex(ContactsContract.Contacts._ID));
75             Cursor cursor = getContentResolver().query(
76                     ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
77                     null,
78                     ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "="
79                             + _id, null, null);
80             while(cursor.moveToNext()){
81                 String phone=cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
82                 buffer.append(phone);
83             }
84 
85         }
86         textView.setText(buffer.toString());
87     }
88 
89     @Override
90     public void onLoaderReset(Loader<Cursor> loader) {
91         // TODO Auto-generated method stub
92 
93     }
94 
95 }

---

Android开始之 数据存储—访问通讯录

Android开始之数据存储—访问通讯录