Android的四大天王

Activity , Content Provider , Service , broadcast receiver

Content Provider 跟Content Resolver 相對應

Service可以透過三個方法來使用

1. extend the Binder class

可以自行定義之間的interface

2. Messenger

較為方便, 但為single thread

3. AIDL

較麻煩

英文文法考前筆記

1. S + 建議 命令 + that + S + (should) + 原形動詞
       要求 規定

    p.s. 這邊用should應該不是問題 , 重點是可以省略 , 省略後還是原形動詞


2. 推測語氣
   s + must + have + p.p. 
       may
   EX. She must have passed the test yesterday ........
      
3.  Although 的倒裝
    Although (=Though) he is a clever boy .....
  = Clever boy though (=as) he is ........
  
4. 
   Not only + A + but (also) + B      |  + 與B一致的動詞
   Not only + A + but + B + as well   |
   B + as well as + A                 | 
   Either A + or + B                  | 
   Neither A + or + B                 |


5.
   A +  with               + B  + 與A一致的動詞
        along with
        together with

6. When + S1 + 過去式 , S2 + was(were) + V-ing
  = While + S2 + was(were) + V-ing , S1 + 過去式

   when是配過去式   , while 是配過去進行式

7. 假設語氣 與事實相反

   If + S + were       ......  , S + would  +  原形動詞
            動詞過去式                 should
            助動詞過去式                could

   If + S + had + p.p .... , S + would + have + p.p
                                 should
                                 could

8. 希望 與事實相反

   與現在事實相反
   S + wish  + (that) + S +  were
                             動詞過去式
                             助動詞過去式

   與過去事實相反
   S + wish + (that) + S + had + p.p

   S + wish + S + would   + 原形動詞 + 未來時間副詞
                  should
                  could

9.
   All that you have to do is + (to) 原型動詞
                              EX : (to) wait patiently 
   這邊要注意to 可以省略 

10.
   S + do + nothing but + 原形動詞
   S + enjoy + nothing but + V-ing
   S + want + nothing but + to + 原形動詞

   這邊除了do以外 , enjoy 或want就是看原本沒有 nothing but的情況下 ,後面要接什麼

11.
   On + V-ing , S + V
        N 
  = As soon as S + V , S + V
   EX: On hearing the news , Jack burst into tears
 

12  
   In + V-ing , S + V
  = When S + V , S + V
  Ex: In preparing for an examination , observe the common sense rules of helth 

13. 
   far from V-ing
   EX: He is far from being rich

14. 
   The book is worth reading
  = The book is worthy of being read.
  = The book is worthy to be read.
  = It's worth your while to read the book 
  = It's worth while reading the book.
 
15 
   It is no use + V-ing
  = It is useless to V

C++考前筆記

1.
explicit 是用來防止constructor自動隱含對單一的參數呼叫constructor

Ball(const char*); //這是constructor

Ball ball = "Green ball"; //會讓這行自動成立

2

C考前筆記

1.
&& 或 || 是會先check前面的判斷式 , 若成立 , 才會再check 下一個判斷式
而& 或 | 是會判斷所有的判斷式 , 然後再作and 或 or


2.
在c語言中 , static function代表private的意味 , 其他.c檔無法call這個function


3.
function pointer

利用typedef 來宣告 function pointer , 用起來比較方便
typedef int (*CustomOperator)( int );

//void custom_for_each( int *pArray, unsigned int size, int (*op)( int ) )
void custom_for_each( int *pArray, unsigned int size, CustomOperator op )

GObject

通常會有三個structure

Example

ExampleClass
含public method

ExamplePrivate

重回C++筆記

原來for迴圈如果宣告int i
這個i是local的 , 不會有重複宣告的問題

如果class A有個constructor可接受int
則int 到 A會有一個個implicit的cast

reference只能initial時指定其指的地方

constructor最好使用初始列來initial

為多形而設計的父類別應該要將destructor設為virtual

destructor不應該丟出異常

constructor或destructor內不能呼叫virtual函式
因為此時子類別中的function還沒成形

NotePad Tutorial

跟自己想像中的不同,不是讀取檔案,而是資料庫
之前沒有使用資料庫的經驗,這次剛好體驗一下Android支援的SQLite
資料庫的處理主要使用SQLiteDatabase 跟 SQLiteOpenHelper兩個class

另外在LifeCycle的處理上,這個tutorial也有不錯的處理
只是作完,還是對List跟資料庫之間利用Adapter的轉換沒啥概念