public class SendedMsg {private int id;private String content;private String numbers;//发送的联系人号码（可能有多个联系人的号码，拼接成一个String）private String names;//发送的联系人名单（可能有多个联系人，拼接成一个String）private String festivalName;private Date date;private String dateStr;//主要为了方便private DateFormat df=new SimpleDateFormat("yyyy-MM-dd HH:mm");public static final String TABLE_NAME="tb_sended_msg";public static final String COLUMN_CONTENT="content";public static final String COLUMN_NUMBERS="numbers";public static final String COLUMN_NAMES="names";public static final String COLUMN_FESTIVAL_NAME="festival_name";public static final String COLUMN_DATE="date_str";public Date getDate() {return date;}public void setDate(Date date) {this.date = date;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getContent() {return content;}public void setContent(String content) {this.content = content;}public String getNumbers() {return numbers;}public void setNumbers(String numbers) {this.numbers = numbers;}public String getNames() {return names;}public void setNames(String names) {this.names = names;}public String getFestivalName() {return festivalName;}public void setFestivalName(String festivalName) {this.festivalName = festivalName;}public String getDataStr() {dateStr=df.format(date);return dateStr;}
}

public class SmsDBOpenHelper extends SQLiteOpenHelper{private static final String DB_NAME="sms.db";private static final int DB_VERSION=1;private static SmsDBOpenHelper mHelper;private SmsDBOpenHelper(Context context) {super(context.getApplicationContext(), DB_NAME, null, DB_VERSION);}//传入的context有可能是一个Activity//所以在构造方法中用context.getApplicationContext()尽量得到Application的context//避免造成内存泄露的问题public static SmsDBOpenHelper getInstance(Context context) {if(mHelper==null) {synchronized (SmsDBOpenHelper.class) {if(mHelper==null) {mHelper=new SmsDBOpenHelper(context);}}}return mHelper;}@Overridepublic void onCreate(SQLiteDatabase db) {String sql="create table "+ SendedMsg.TABLE_NAME+" ( "+"_id integer primary key autoincrement, "+SendedMsg.COLUMN_DATE+" integer, "+SendedMsg.COLUMN_FESTIVAL_NAME+" text,"+SendedMsg.COLUMN_CONTENT+" text,"+SendedMsg.COLUMN_NAMES+" text,"+SendedMsg.COLUMN_NUMBERS+" text )";db.execSQL(sql);}@Overridepublic void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {}
}

public class SmsProvider extends ContentProvider{private static final String AUTHORITY="com.just.sms.provider.SmsProvider";public static final Uri URI_SMS_ALL=Uri.parse("content://"+AUTHORITY+"/sms");private static UriMatcher mMatcher;private static final int SMS_ALL=0;//表示访问表中的所有数据private static final int SMS_ONE=1;//表示访问表中的单条数据//在静态代码块中完成mMatcher的初始化及uri的添加static {mMatcher=new UriMatcher(UriMatcher.NO_MATCH);//addURI接收三个参数，可以分别把权限、路径和一个自定义代码传进去//*：表示匹配任意长度的任意字符；#：表示匹配任意长度的数字mMatcher.addURI(AUTHORITY,"sms",SMS_ALL);mMatcher.addURI(AUTHORITY,"sms/#",SMS_ONE);}private SmsDBOpenHelper mHelper;private SQLiteDatabase mDB;@Overridepublic boolean onCreate() {mHelper=SmsDBOpenHelper.getInstance(getContext());return true;}@Overridepublic Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {int match=mMatcher.match(uri);switch (match) {case SMS_ALL:break;case SMS_ONE://本案例用不到，但展示一下代码逻辑long id=ContentUris.parseId(uri);//从路径中中获取idselection="_id = ?";selectionArgs=new String[]{String.valueOf(id)};break;default:throw new IllegalArgumentException("Wrong URI:"+uri.toString());}mDB=mHelper.getReadableDatabase();Cursor cursor=mDB.query(SendedMsg.TABLE_NAME,projection,selection,selectionArgs,null,null,sortOrder);//用来在后台检测数据的变化，如果有变化就会有返回（因为在SmsHistoryFragment中使用了Loader）
        cursor.setNotificationUri(getContext().getContentResolver(),URI_SMS_ALL);return cursor;}@Overridepublic Uri insert(Uri uri, ContentValues values) {int match=mMatcher.match(uri);if(match!=SMS_ALL) {throw new IllegalArgumentException("Wrong URI:"+uri.toString());}mDB=mHelper.getWritableDatabase();//第二个参数用于在未指定添加数据的情况下给某些可为空的列自动赋值NULL，一般我们用不到这个功能，直接传入null 即可long rowId=mDB.insert(SendedMsg.TABLE_NAME,null,values);if(rowId>0) {//如果添加数据成功
            notifyDataSetChanged();return ContentUris.withAppendedId(uri,rowId);//为传入的uri加上id
        }return uri;}private void notifyDataSetChanged() {getContext().getContentResolver().notifyChange(URI_SMS_ALL,null);//通知监听器关于数据更新的信息
    }@Overridepublic int delete(Uri uri, String selection, String[] selectionArgs) {return 0;}@Overridepublic int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {return 0;}@Overridepublic String getType(Uri uri) {return null;}
}

<providerandroid:name=".db.SmsProvider"android:authorities="com.just.sms.provider.
SmsProvider">
</provider>

cursor.setNotificationUri(getContext().getContentResolver(),URI_SMS_ALL);

getContext().getContentResolver().notifyChange(URI_SMS_ALL,null);