SimpleCursorAdapter类与数据绑定(2)

                Random random = new Random(); 
                for ( int i = 0;i<20;i++) 
                { 
                        String s = ""; 
                        for(int j=0;j<10;j++) 
                        { 
                                char c = (char)(97+random.nextInt(26)); 
                                s+=c; 
                        } 
                        db.execSQL("insert into t_test(name)values(?)",new Object[]{s}); 
                                         
                } 
        } 
 
        @Override 
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
 
        } 
 
        //执行查询语句 
        public Cursor query(String sql,String[] args) 
        { 
                SQLiteDatabase db = this.getReadableDatabase(); 
                Cursor cursor = db.rawQuery(sql, args); 
                return cursor; 
        }