<provider android:name=".SomeProvider" 
  android:authorities="com.your-company.SomeProvider"/> 

package com.scott.provider; 
 
import android.content.ContentProvider; 
import android.content.ContentUris; 
import android.content.ContentValues; 
import android.content.UriMatcher; 
import android.database.Cursor; 
import android.database.sqlite.SQLiteDatabase; 
import android.net.Uri; 
 
public class PersonProvider extends ContentProvider { 
 
  private static final UriMatcher matcher; 
  private DBHelper helper; 
  private SQLiteDatabase db; 
   
  private static final String AUTHORITY = "com.scott.provider.PersonProvider"; 
  private static final int PERSON_ALL = 0; 
  private static final int PERSON_ONE = 1; 
   
  public static final String CONTENT_TYPE = "vnd.android.cursor.dir/vnd.scott.person"; 
  public static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/vnd.scott.person"; 
   
  //数据改变后立即重新查询 
  private static final Uri NOTIFY_URI = Uri.parse("content://" + AUTHORITY + "/persons"); 
   
  static { 
    matcher = new UriMatcher(UriMatcher.NO_MATCH); 
     
    matcher.addURI(AUTHORITY, "persons", PERSON_ALL);  //匹配记录集合 
    matcher.addURI(AUTHORITY, "persons/#", PERSON_ONE); //匹配单条记录 
  } 
   
  @Override 
  public boolean onCreate() { 
    helper = new DBHelper(getContext()); 
    return true; 
  } 
 
  @Override 
  public String getType(Uri uri) { 
    int match = matcher.match(uri); 
    switch (match) { 
    case PERSON_ALL: 
      return CONTENT_TYPE; 
    case PERSON_ONE: 
      return CONTENT_ITEM_TYPE; 
    default: 
      throw new IllegalArgumentException("Unknown URI: " + uri); 
    } 
  } 
   
  @Override 
  public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) { 
    db = helper.getReadableDatabase(); 
    int match = matcher.match(uri); 
    switch (match) { 
    case PERSON_ALL: 
      //doesn't need any code in my provider. 
      break; 
    case PERSON_ONE: 
      long _id = ContentUris.parseId(uri); 
      selection = "_id = ?"; 
      selectionArgs = new String[]{String.valueOf(_id)}; 
      break; 
    default: 
      throw new IllegalArgumentException("Unknown URI: " + uri); 
    } 
    return db.query("person", projection, selection, selectionArgs, null, null, sortOrder); 
  } 
 
  @Override 
  public Uri insert(Uri uri, ContentValues values) { 
    int match = matcher.match(uri); 
    if (match != PERSON_ALL) { 
      throw new IllegalArgumentException("Wrong URI: " + uri); 
    } 
    db = helper.getWritableDatabase(); 
    if (values == null) { 
      values = new ContentValues(); 
      values.put("name", "no name"); 
      values.put("age", "1"); 
      values.put("info", "no info."); 
    } 
    long rowId = db.insert("person", null, values); 
    if (rowId > 0) { 
      notifyDataChanged(); 
      return ContentUris.withAppendedId(uri, rowId); 
    } 
    return null; 
  } 
 
  @Override 
  public int delete(Uri uri, String selection, String[] selectionArgs) { 
    db = helper.getWritableDatabase(); 
    int match = matcher.match(uri); 
    switch (match) { 
    case PERSON_ALL: 
      //doesn't need any code in my provider. 
      break; 
    case PERSON_ONE: 
      long _id = ContentUris.parseId(uri); 
      selection = "_id = ?"; 
      selectionArgs = new String[]{String.valueOf(_id)}; 
    } 
    int count = db.delete("person", selection, selectionArgs); 
    if (count > 0) { 
      notifyDataChanged(); 
    } 
    return count; 
  } 
 
  @Override 
  public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) { 
    db = helper.getWritableDatabase(); 
    int match = matcher.match(uri); 
    switch (match) { 
    case PERSON_ALL: 
      //doesn't need any code in my provider. 
      break; 
    case PERSON_ONE: 
      long _id = ContentUris.parseId(uri); 
      selection = "_id = ?"; 
      selectionArgs = new String[]{String.valueOf(_id)}; 
      break; 
    default: 
      throw new IllegalArgumentException("Unknown URI: " + uri); 
    } 
    int count = db.update("person", values, selection, selectionArgs); 
    if (count > 0) { 
      notifyDataChanged(); 
    } 
    return count; 
  } 
 
  //通知指定URI数据已改变 
  private void notifyDataChanged() { 
    getContext().getContentResolver().notifyChange(NOTIFY_URI, null);     
  } 
} 

package com.scott.provider; 
 
public class Person { 
  public int _id; 
  public String name; 
  public int age; 
  public String info; 
   
  public Person() { 
  } 
   
  public Person(String name, int age, String info) { 
    this.name = name; 
    this.age = age; 
    this.info = info; 
  } 
} 
[java] view plain copy
package com.scott.provider; 
 
import android.content.Context; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 
 
public class DBHelper extends SQLiteOpenHelper { 
 
  private static final String DATABASE_NAME = "provider.db"; 
  private static final int DATABASE_VERSION = 1; 
   
  public DBHelper(Context context) { 
    super(context, DATABASE_NAME, null, DATABASE_VERSION); 
  } 
 
  @Override 
  public void onCreate(SQLiteDatabase db) { 
    String sql = "CREATE TABLE IF NOT EXISTS person" + 
        "(_id INTEGER PRIMARY KEY AUTOINCREMENT, name VARCHAR, age INTEGER, info TEXT)"; 
    db.execSQL(sql); 
  } 
 
  @Override 
  public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    db.execSQL("DROP TABLE IF EXISTS person"); 
    onCreate(db); 
  } 
} 

<provider android:name=".PersonProvider" 
  android:authorities="com.scott.provider.PersonProvider" 
  android:multiprocess="true"/> 

package com.scott.provider; 
 
import java.util.ArrayList; 
 
import android.app.Activity; 
import android.content.ContentResolver; 
import android.content.ContentUris; 
import android.content.ContentValues; 
import android.database.Cursor; 
import android.database.CursorWrapper; 
import android.net.Uri; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.view.View; 
import android.widget.ListView; 
import android.widget.SimpleCursorAdapter; 
 
 
public class MainActivity extends Activity { 
   
  private ContentResolver resolver; 
  private ListView listView; 
   
  private static final String AUTHORITY = "com.scott.provider.PersonProvider"; 
  private static final Uri PERSON_ALL_URI = Uri.parse("content://" + AUTHORITY + "/persons"); 
   
  private Handler handler = new Handler() { 
    public void handleMessage(Message msg) { 
      //update records. 
      requery(); 
    }; 
  }; 
   
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
 
    resolver = getContentResolver(); 
    listView = (ListView) findViewById(R.id.listView); 
     
    //为PERSON_ALL_URI注册变化通知 
    getContentResolver().registerContentObserver(PERSON_ALL_URI, true, new PersonObserver(handler)); 
  } 
   
  /** 
   * 初始化 
   * @param view 
   */ 
  public void init(View view) { 
    ArrayList<Person> persons = new ArrayList<Person>(); 
     
    Person person1 = new Person("Ella", 22, "lively girl"); 
    Person person2 = new Person("Jenny", 22, "beautiful girl"); 
    Person person3 = new Person("Jessica", 23, "sexy girl"); 
    Person person4 = new Person("Kelly", 23, "hot baby"); 
    Person person5 = new Person("Jane", 25, "pretty woman"); 
     
    persons.add(person1); 
    persons.add(person2); 
    persons.add(person3); 
    persons.add(person4); 
    persons.add(person5); 
 
    for (Person person : persons) { 
      ContentValues values = new ContentValues(); 
      values.put("name", person.name); 
      values.put("age", person.age); 
      values.put("info", person.info); 
      resolver.insert(PERSON_ALL_URI, values); 
    } 
  } 
   
  /** 
   * 查询所有记录 
   * @param view 
   */ 
  public void query(View view) { 
//   Uri personOneUri = ContentUris.withAppendedId(PERSON_ALL_URI, 1);查询_id为1的记录 
    Cursor c = resolver.query(PERSON_ALL_URI, null, null, null, null); 
     
    CursorWrapper cursorWrapper = new CursorWrapper(c) { 
       
      @Override 
      public String getString(int columnIndex) { 
        //将简介前加上年龄 
        if (getColumnName(columnIndex).equals("info")) { 
          int age = getInt(getColumnIndex("age")); 
          return age + " years old, " + super.getString(columnIndex); 
        } 
        return super.getString(columnIndex); 
      } 
    }; 
     
    //Cursor须含有"_id"字段 
    SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_2, 
        cursorWrapper, new String[]{"name", "info"}, new int[]{android.R.id.text1, android.R.id.text2}); 
    listView.setAdapter(adapter); 
     
    startManagingCursor(cursorWrapper); //管理Cursor 
  } 
   
  /** 
   * 插入一条记录 
   * @param view 
   */ 
  public void insert(View view) { 
    Person person = new Person("Alina", 26, "attractive lady"); 
    ContentValues values = new ContentValues(); 
    values.put("name", person.name); 
    values.put("age", person.age); 
    values.put("info", person.info); 
    resolver.insert(PERSON_ALL_URI, values); 
  } 
   
  /** 
   * 更新一条记录 
   * @param view 
   */ 
  public void update(View view) { 
    Person person = new Person(); 
    person.name = "Jane"; 
    person.age = 30; 
    //将指定name的记录age字段更新为30 
    ContentValues values = new ContentValues(); 
    values.put("age", person.age); 
    resolver.update(PERSON_ALL_URI, values, "name = ?", new String[]{person.name}); 
     
    //将_id为1的age更新为30 
//   Uri updateUri = ContentUris.withAppendedId(PERSON_ALL_URI, 1); 
//   resolver.update(updateUri, values, null, null); 
  } 
   
  /** 
   * 删除一条记录 
   * @param view 
   */ 
  public void delete(View view) { 
    //删除_id为1的记录 
    Uri delUri = ContentUris.withAppendedId(PERSON_ALL_URI, 1); 
    resolver.delete(delUri, null, null); 
     
    //删除所有记录 
//   resolver.delete(PERSON_ALL_URI, null, null); 
  } 
   
  /** 
   * 重新查询 
   */ 
  private void requery() { 
    //实际操作中可以查询集合信息后Adapter.notifyDataSetChanged(); 
    query(null); 
  } 
} 

PersonObserver：
package com.scott.provider; 
 
import android.database.ContentObserver; 
import android.os.Handler; 
import android.os.Message; 
import android.util.Log; 
 
public class PersonObserver extends ContentObserver { 
 
  public static final String TAG = "PersonObserver"; 
  private Handler handler; 
   
  public PersonObserver(Handler handler) { 
    super(handler); 
    this.handler = handler; 
  } 
   
  @Override 
  public void onChange(boolean selfChange) { 
    super.onChange(selfChange); 
    Log.i(TAG, "data changed, try to requery."); 
    //向handler发送消息,更新查询记录 
    Message msg = new Message(); 
    handler.sendMessage(msg); 
  } 
} 

<!-- MIME类型 --> 
<intent-filter> 
  <data android:mimeType="vnd.android.cursor.dir/vnd.scott.person"/> 
</intent-filter> 
<intent-filter> 
  <data android:mimeType="vnd.android.cursor.item/vnd.scott.person"/> 
</intent-filter>