[自學進度] 2013/8/6

Android

• 出處：Saving Data in SQL Databases
• 官方demo code：Searchable Dictionary  (需要Android關於Thread的知識：Processes and Threads) 
• 稍微研究了一下官方的demo code，在Android裡Thread的概念滿重要的，更改目標先學習Thread

Thread

• [Android] 多執行緒-Handler和Thread的關係
• [Android] 多執行緒-Handler和Thread的關係 （2）  (滿清楚的)
• 清楚了解 android.os 源碼中的Looper,Handler,Message,MessageQueue
• [Android]使用Handler搭配Thread
• 圖解Android Handler Thread Message 線程消息機制
• AsyncTask - Thread 外的另一選擇
• Processes and Threads
• Sending Operations to Multiple Threads
• Connecting to the Network

小筆記

• new Runnable 所做的事與 class implement Runnable 是一樣的

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Saving Data in SQL Databases

The APIs you'll need to use a database on Android are available in theandroid.database.sqlite package.

Define a Schema and Contract

• The schema is reflected in the SQL statements that you use to create your database. 
• You may find it helpful to create a companion class, known as a contract class, which explicitly specifies the layout of your schema in a systematic and self-documenting way.
• A contract class 
• is a container for constants that define names for URIs, tables, and columns.
• allows you to use the same constants across all the other classes in the same package.
•  This lets you change a column name in one place and have it propagate throughout your code.
•