Naming rules for Android development and android Development

Naming rules for Android development and android Development

Identifier name Method
There are four types of identifiers:

1 Camel naming method: Also known as Camel naming method, the first letter of all other words except the first word is capitalized.

2 Pa pascal (pascal) naming method: Also known as the big camper naming method, the first letter of all words in uppercase

3. Underline naming: Separate words with underscores.

4 Hungary naming: This method is widely used in Microsoft programming environments. The variable type is described by appending a lower-case sequence before the variable in Pascal naming. The naming method of quantity is: <scope _> + <prefix _> + <qualifier> range prefix, type prefix, and qualified word.

I personally think that the identifier naming principle: use as few characters as possible to fully express the meaning of the identifier.

Abbreviations:
1 short words can be abbreviated by removing the "vowel"
2. The first few letters of a long word can be abbreviated.
3. There are also some common abbreviations of English words.

The following are common abbreviations:

Name	Abbreviations
Icon	Ic (mainly used in app icons)
Color	Cl (mainly used for color values)
Divider	Di (mainly used for separation line, including not only divider in Listview, but also line in normal layout)
Selector	Sl (mainly used for multiple States of a view, including not only selector in Listview, but also selector of buttons)
Average	Avg
Background	Bg (mainly used for la S and sub-la S)
Buffer	Buf
Control	Ctrl
Delete	Del
Document	Doc
Error	Err
Escape	Esc
Increment	Inc
Infomation	Info
Initial	Init
Image	Img
Internationalization	I18N
Length	Len
Library	Lib
Message	Msg
Password-	Pwd
Position	Pos
Server	Srv
String	Str
Temp	Tmp
Window	Wnd (win)

The abbreviation principle is used in the program: Do not use the abbreviation unless it is customary.

Naming rules:

Packages: Uses anti-Domain Name naming rules and uses lowercase letters. The first-level package name is com, the second-level package name is xx (can be a company or an individual's casual), the third-level package name is based on the application name, and the fourth-level package name is module name or level name.

Package name	This package contains
Com. xx. Application name abbreviation. activities	Activity Class used on the page (activities level Name User Interface Layer)
Com. xx. Application name abbreviation. base	Each Activity class on the page can be written as an I-amount BaseActivity class (basic shared class)
Com. xx. Application name abbreviation. adapter	Page Adapter class (Adapter class)
Com. xx. Application name abbreviation. tools	This package includes: Public tool method class (tool module name)
Com. xx. Application name abbreviation. bean (or com. xx. Application name abbreviation. unity)	This package includes: Element class
Com. xx. Application name abbreviation. db	Database Operations
Com. xx. Application name abbreviation. view (or com. xx. Application name abbreviation. ui)	Custom View class
Com. xx. Application name abbreviation. service	Service
Com. xx. Application name abbreviation. broadcast	Broadcast Service

Class 2 (classes): a noun that uses the big camper method to avoid abbreviations unless the abbreviation is well known, such as HTML and URL. If the class name contains a word abbreviation, each letter of the abbreviation should be capitalized.

Class	Description	For example
Activity Type	Aty or Activity is a suffix	Welcome Page class WelcomeAty. Or WelcomeActivity
Adapter class	Adp or Adapte is a suffix	News details adapter NewtDetailAdp or NewDetailAdapter
Resolution class	Hlr is a suffix identifier	HomePosterHlr
Common Methods	Tools or Manager is a suffix	Thread Pool Management class: ThreadPoolManager Log tool: LogTools
Database	Marked with the DBHelper suffix	News Database: NewDBHelper
Service	Marked with a Service extension	Time Service TimeService
BroadcastReceive class	ID with Broadcast as the suffix	Time notification TimeBroadcast
ContentProvider	ID with Provider suffix
Shared basic classes written directly	Starting with Base	BaseActivity, BaseFragment

3 interface: Like a class, the naming rule uses the big camper method and ends with able or visible, such as interface Runna ble;
Interface Accessible.

Method 4 (methods): a verb or a noun. The method of using a small camper is called onCreate () and run ()

Method	Description
InitXX ()	Initialize related methods and use init as the prefix, such as initializing the layout of initView ()
IsXX ()	If the checkXX () method returns a boolean value, use is or check as the prefix.
GetXX ()	Returns a value using the get prefix.
ProcessXX ()	To process data, use process as the prefix.
DisplayXX ()	A prompt box and prompt message are displayed, marked with the prefix "display ".
SaveXX ()	Id related to data storage using sav as the e prefix
ResetXX ()	For data restructuring, use the reset prefix to identify
ClearXX ()	Clear data-related
RemoveXXX ()	Clear data-related
DrawXXX ()	Used to identify data or effects based on the draw prefix.