android 怎么判断数据库里没有数据

Cursor cur = DR.query("hellokitty", new String[]{"hello"}, null, null, null, null,null)

if(!cur.moveToFirst()){

//没有数据

}

我是这么做的，在hellokitty的表里找hello数据，如果!cur.moveToFirst 就表明没有数据。。否则就存在数据

sqlite判断表是否存在，代码如下：

/**

         * 判断某张表是否存在

         * @param tabName 表名

         * @return

         */

        public boolean tabIsExist(String tabName){

                boolean result = false

                if(tabName == null){

                        return false

                }

                SQLiteDatabase db = null

                Cursor cursor = null

                try {

                        db = this.getReadableDatabase()//此this是继承SQLiteOpenHelper类得到的

                        String sql = select count(*) as c from sqlite_master where type ='table' and name ='+tabName.trim()+' 

                        cursor = db.rawQuery(sql, null)

                        if(cursor.moveToNext()){

                                int count = cursor.getInt(0)

                                if(count>0){

                                        result = true

                                }

                        }

                         

                } catch (Exception e) {

                        // TODO: handle exception

                }                

                return result

        }

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