Android Studio Notes

Android_studio precautions for use

1,as can use the Eclipse SDK, But it cannot be shared ( the latest SDK Eclipse is not supported , so the SDK has been updated as later , Eclipse you can't use it. )

2, recommended to use the extracted version of as,as c disk user Directory . If it's an uncompressed version of delete the corresponding profile directory is quite a reinstall of ( So the unzipped version of the folder can be copied directly to others , Don't worry about configuring

3, If the first open crash , find idea.properties last append disable.android.first.run= True ( no initialization step ), Avoid connecting Google server update SDK

4, directory structure

Two tiers : The name you specified when you created the project , like Eclipse the workspace name in

Small layer : Module, similar to small projects in Eclipse Project

① default is Android view : manifest file + Java code + resource file , Gradle

② can be switched to hard drive view (Project)

App>>src>> Code , resource Files , manifest files , will be edited everything is here

Libs to put extra jar Packages

The green . gradle suffix file ( folder not included ) is important

Other folders or files can be deleted , do not affect the program run ( will be automatically generated , So in version control should pay attention to the filter , Temporary )

Each Module corresponds to a gradle, the whole project also corresponds to a gradle, It is inside each one Module

build>>outputs>> stored in Module with apk

Build>>source>>r>>xxx r File here

Copy the source of the time to remember to delete the build folder , It is similar to a cache directory , occupy a large space .

5, You can search directly in the directory of the corresponding files ( no search box , but can search directly )

6,android Studio 2.0 new features

Instant run immediately After the initial deployment of an application to a real device or emulator, the immediate run pushes most of the changed code or resources without having to build a new APK .

However, this new feature is still a BUG , the modification of the layout file will immediately push the modified code , but modify the Java Sometimes the code will not succeed , if not successful, you can turn off the Instant Run and then turn it back on .

If the re- opening is not valid, restart the Studio

The essence is to continually submit data to the simulator by keeping a stream

7, modify common Settings ( all in Setting can find Ctrl + AIT + s)

Updates settings > can select the stable version (Stable Channel) to work with or Canary channel ( try out new features with beta version when studying

The bar in the code is a suggested line of code do not exceed here

Display whitespace characters , do not use the tab key in the work, use the SPACEBAR , but as Representative 4 a

Automatic Guide Package : Optimize imports on fly and its options below ( If there are multiple packages , It will not automatically guide the package )

Code completion : First letter case sensitive completion

ait+/ tip : find shortcut keys keymap>>completion>> Modify Basic The default shortcut key

Eclipse 's keying mapping is not recommended because everyone is accustomed to different , so it is still possible to use the default .

9, common shortcut keys :

Ctrl + f12// member variables and jump for member methods

ctrl+n// class Jump

Shift Double-click // any jump , XML file , toolbar can be used to jump

f2// jump to the next error line

ctrl+p// parameter Hints

ctrl+q// Viewing document comments

ait+enter// automatically fix code errors

ctrl+alt+l// Formatting

ctrl+d// Copy Selected rows

ctrl+y// Delete this line

ctrl+x// clip without selecting a row

ctrl+ait+o// automatic deletion of unused packages

alt+insert// automatic generation of common methods , such as the get,set method

ctrl+o// The method of the parent class , does not automatically fill in the code

Ten, templates >> settings>>file and Code Templates

Some companies will explain the modification record in the class document comment

Fbc>> One-click to find id>> automatically identifies the control type

Android provides a lot of useful code templates , Nothing to look at

One, custom code templates

Settings>>live>> do not create a new code template directly , create a new code group

For example : LOG.E (Tag,"$cname $. $nnmae $, $msg $");// Remember to set the context

$$ refers to a variable , the name is random , You can edit the specified name , by the cursor will occupy ( Enter to jump to the next )

Install the plugin

①MarkDown plugin //md documentation , embarrassing , taking notes

②wifiadb

the use of Debug

Next , Enter method , Force entry Method ( lack of source code ), jump Out of method

Unit Test

Project Test package , androidtest can be tested with the class of the context , the normal test You can test the normal class

Sout shortcut key >>system.out.print

The test package here is not packaged in the APK

the role of 15,gradle

Settings.gradle Declaration Project all modules represent that the package is in use , cannot be removed , and can play a protective role

Project Builde.gradle jcenter ()// source repository , if the download jar package always fails , Replace mavencentral ()

The builde.gradle of the app is stored in the compiled information : compiled version , Buildtools

If someone else's app uses a different version of buildtools , You can choose to modify it here , or download the corresponding version .

:p roguardfiles confusing file locations under the buildtypes node

Dependencies node is dependent information , the configuration of the external reference jar Package

16. Importing third-party jar Packages

Project structure>>app>>depentcies>> can search for third-party dependent packages ( such as xtuils) from the server

When using The AS Project , If you delete some resource files , re-import can

Import the eclispse project , do not modify the options , will automatically convert eclipse Project

Import the project using the Eclipse directory structure

ADT23, the latest version of ADT more than one feature , Export can be exported to generate Gradle mode files

The

generated build. Gradle file , gradle version Span style= "FONT-FAMILY:CALIBRI;" >, auto-generated very old

Delete the Gradle folder ( the Gradle version in the configuration file is older , Delete , download is available )

Android Studio Notes