public interface Menus extends BaseColumns {// 注意,此处AUTHORITY一定要和Manifest.xml中的配置完全相同public static final String AUTHORITY = "com.moka.menuprovider";// 表名public static final String TABLE_NAME = "MenuTbl";// 访问本表所需的URIpublic static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/" + TABLE_NAME);// 字段名public static final String PRICE= "price";                // 价格public static final String TYPE_ID = "typeId";            //类型public static final String NAME= "name";                // 名称public static final String PIC= "pic";                    // 图片public static final String REMARK= "remark";            // 备注// 排序操作public static final String SORT_ORDER = "_id ASC";}

db.execSQL("CREATE TABLE " + Menus.TABLE_NAME + " ("+ Menus._ID + " INTEGER PRIMARY KEY,"+ Menus.PRICE + " INTEGER,"+ Menus.TYPE_ID + " INTEGER,"+ Menus.NAME + " TEXT,"+ Menus.PIC + " TEXT,"+ Menus.REMARK + " TEXT"+ ");");

db.execSQL("DROP TABLE IF EXISTS " + Menus.TABLE_NAME);

public class MenuProvider extends ContentProvider {private DBHelper helper = null;private static UriMatcher uriMatcher = null;private static final int GET_LIST = 1;private static final int GET_ITEM = 2;static {uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);uriMatcher.addURI(Menus.AUTHORITY, Menus.TABLE_NAME, GET_LIST);uriMatcher.addURI(Menus.AUTHORITY, Menus.TABLE_NAME + "/#", GET_ITEM);}@Overridepublic boolean onCreate() {helper = new DBHelper(getContext());helper.getReadableDatabase();return true;}@Overridepublic String getType(Uri uri) {// 暂时不需要查看类型return null;}@Overridepublic Uri insert(Uri uri, ContentValues values) {SQLiteDatabase db = this.helper.getWritableDatabase() ;long id = 0 ;switch(uriMatcher.match(uri)) {case GET_LIST :// 插入数据操作id = db.insert(Menus.TABLE_NAME, Menus._ID, values);String uriPath = uri.toString() ;String path = uriPath + "/" + id ;return Uri.parse(path) ;case GET_ITEM :return null ; default:throw new UnsupportedOperationException("Not Support Operation :"+ uri);}}@Overridepublic Cursor query(Uri uri, String[] projection, String selection,String[] selectionArgs, String sortOrder) {// 获得可读数据库SQLiteDatabase db = helper.getReadableDatabase();switch (uriMatcher.match(uri)) {case GET_LIST:return db.query(Menus.TABLE_NAME, projection, selection, selectionArgs, null, null, sortOrder);case GET_ITEM:long id = ContentUris.parseId(uri) ;String where = "_id=" + id ;return db.query(Menus.TABLE_NAME, projection, where, selectionArgs, null, null, sortOrder);default:throw new UnsupportedOperationException("Not Support Operation :"+ uri);}}@Overridepublic int update(Uri uri, ContentValues values, String selection,String[] selectionArgs) {// 暂时不需要更新操作return 0;}@Overridepublic int delete(Uri uri, String selection, String[] selectionArgs) {// 暂时不需要删除操作return 0;}}