Android first section (System introduction), review of dimension and dimension

Android Learning has been a long time, feel a lot of knowledge has been forgotten, now began to slowly organize it, refueling!

Let's start the Android Foundation tour today!

First, Android's system framework

Android system architecture is divided into 4 layers

1, application application layer;

2. Framework application frame layer;

3, libraries system run time and System Class library layer (c + +);

4, Linux kernel and hardware drive layer;

Ii. Introduction of Android Application development system

1. Four components: Activity,service,broadcastreceiver (broadcast receiver), ContentProvider (content provider).

2. UI controls

3, Multithreading: handler mechanism, Asynctask.

4. Network access

5. Data storage

6. Resource management: Image resources, layout resources, animation resources, constant resources, raw resources, assets resources

7. Animations and menus

8. Advanced Components

9. Event distribution mechanism

10. System service

11. Third-party class library

12. Screen Fitting

III. directory structure description of Android project

SRC: Source file

Gen: System Resource Generation Package

Bin: Destination file

Assets: Non-Android resource file, storing application profile

Libs: Third party class package

Res: Different resource files (drawable (image resources), layout (layouts resources), values (constant resources), menus (menu resources)).

Androidmanifest.xml: App manifest file

Project.Properties: Apply Project Properties File

This article is from the "Vivian Son" blog, please be sure to keep this source http://9550674.blog.51cto.com/9540674/1576651

Android first section (System introduction), review of dimension and dimension