Android Basic Concept (i)

(i) Four components:

Activity, broadcast receiver (broadcast receiver), service, content provider (contents Provider)

(ii) Android Engineering program structure

SRC: folder where source code is placed

Gen: The system automatically generates a file that identifies the resource ID and does not change it manually

Assets: Rarely used, can put some packaging files

Bin: The system automatically generates the folder for the installation package, *.apk is the file that the phone can install

Libs: If you use a third-party library, place it in this folder

Res: The resources of the system, very important

Androidmanifest.xml: Main configuration file of the system

Android Basic Concept (i)