ContentProvider

https://developer.android.com/guide/topics/providers/content-provider-basics.html?hl=zh-cn
还需要完善单条记录 查询 修改等
一、新建数据库
https://github.com/BlogForMe/AndroidProject/blob/master/ContentProvider/mylibrary/src/main/java/com/hyhy/mylibrary/ArticleDbHelper.java
二、创建ContentProvider

    public class ArticlesProvider extends ContentProvider {
        public static final String AUTHORITY = "com.hyhy.contenttest.db.ArticlesProvider";  //标识特定ContentProvider,使用包名使他唯一
        private static final Uri NOTIFY_URI = Uri.parse("content://" + AUTHORITY + "/" + TABLE_NAME);
        private static final UriMatcher uriMatcher;


        /**
         * Match Code
         */
        public static final int ARTICLE_ALL = 0;
        public static final int ARTICLE_SINGLE = 1;


        /**
         * MIME
         */
        public static final String CONTENT_TYPE = "vnd.android.cursor.dir/vnd.com.hyhy.article";
        private static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/vnd.com.hyhy.article";

        static {
            uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
            uriMatcher.addURI(AUTHORITY, TABLE_NAME, ARTICLE_ALL);          //匹配记录集合
            uriMatcher.addURI(AUTHORITY, TABLE_NAME + "/#", ARTICLE_SINGLE);    //匹配单条记录
        }

        private ArticleDbHelper helper;
        private SQLiteDatabase db;
        private ContentResolver resolver;

        @Override
        public boolean onCreate() {
            resolver = getContext().getContentResolver();
            helper = new ArticleDbHelper(getContext());
            return false;
        }

        @Nullable
        @Override
        public String getType(@NonNull Uri uri) {
            int match = uriMatcher.match(uri);
            switch (match) {
                case ARTICLE_ALL:
                    return CONTENT_TYPE;
                case ARTICLE_SINGLE:
                    return CONTENT_ITEM_TYPE;
                default:
                    throw new IllegalArgumentException("Unknown URI: " + uri);
            }
        }

        @Override
        public Cursor query(@NonNull Uri uri, @Nullable String[] projection, @Nullable String selection, @Nullable String[] selectionArgs, @Nullable String sortOrder) {
            db = helper.getReadableDatabase();
            int match = uriMatcher.match(uri);
            switch (match) {
                case ARTICLE_ALL:
                    //doesn't need any code in my provider.
                    break;
                case ARTICLE_SINGLE:
    //                long _id  = ContentUris.parseId()
                    break;
                default:
                    throw new IllegalArgumentException("Unknown URI: " + uri);
            }
            return db.query(TABLE_NAME, projection, selection, selectionArgs, null, null, sortOrder);
        }


        @Nullable
        @Override
        public Uri insert(@NonNull Uri uri, @Nullable ContentValues values) {
            int match = uriMatcher.match(uri);
            if (match != ARTICLE_ALL) {
                throw new IllegalArgumentException("Wrong URI:" + uri);
            }
            db = helper.getWritableDatabase();
            long rowId = db.insert(TABLE_NAME, null, values);
            if (rowId > 0) {
                notifyDataChanged();
                return ContentUris.withAppendedId(uri, rowId);
            }
            return null;
        }


        @Override
        public int delete(@NonNull Uri uri, @Nullable String selection, @Nullable String[] selectionArgs) {
            return 0;
        }

        @Override
        public int update(@NonNull Uri uri, @Nullable ContentValues values, @Nullable String selection, @Nullable String[] selectionArgs) {
            return 0;
        }

         private void notifyDataChanged() {
            getContext().getContentResolver().notifyChange(NOTIFY_URI, null);
         }
     }

配置Androidmanifest.xml

  <provider
         android:name=".db.ArticlesProvider"
        android:authorities="com.hyhy.contenttest.db.ArticlesProvider"
        android:exported="true" />

三、操作ContentProvider

 public class MainActivity extends AppCompatActivity {
    private static final String AUTHORITY = "com.hyhy.contenttest.db.ArticlesProvider";
    private static final Uri ARTICLE_ALL_URI = Uri.parse("content://" + AUTHORITY + "/" + TABLE_NAME);
    private ContentResolver resolver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        resolver = getContentResolver();
    }


    public void addDb(View v) {
        ContentValues values;
        for (int i = 1; i < 5; i++) {
            values = new ContentValues();
            values.put(ArticleReaderContract.Articles.COLUMN_NAME_ENTRY_ID, i);
            values.put(ArticleReaderContract.Articles.COLUMN_NAME_TITLE, "heh " + i);
            values.put(ArticleReaderContract.Articles.COLUMN_NAME_SUBTITLE, "describe " + i);
            resolver.insert(ARTICLE_ALL_URI, values);
        }
        Toast.makeText(MainActivity.this, "插入成功", Toast.LENGTH_SHORT).show();
    }

    public void btQueryAll(View v) {
        Cursor c = resolver.query(ARTICLE_ALL_URI, null, null, null, null);
        while (c.moveToNext()) {
            System.out.println(c.getString(c.getColumnIndex(COLUMN_NAME_TITLE)));
        }
    }
}

参考 ： http://blog.csdn.net/liuhe688/article/details/7050868
这一块还不熟悉