An Android library is structurally the same as an Android app module.It can include everything needed to build an app, including source code,resource files, and an Android manifest.However, instead of compiling into an APK that runs on a device,an Android library compiles into an Android Archive (AAR) file that you can useas a dependency for an Android app module. Unlike JAR files, AAR files offerthe following functionality for Android applications:
- AAR files can contain Android resources and a manifest file, which allowsyou to bundle in shared resources like layouts and drawables in additionto Java classes and methods.
- AAR files can contain C/C++ librariesfor use by the app module's C/C++ code.
A library module is useful in the following situations:
- When you're building multiple apps that use some ofthe same components, such as activities, services, or UI layouts.
- When you're building an app that exists in multiple APK variations, such asa free and paid version and you need the same core components in both.
Ouvrir Rar Android App
An Android library is structurally the same as an Android app module. It can include everything needed to build an app, including source code, resource files, and an Android manifest. However, instead of compiling into an APK that runs on a device, an Android library compiles into an Android Archive (AAR) file that you can use as a dependency. BIMx Mobile app BIMx Desktop Viewer BIMx Hyper-models created with GRAPHISOFT Archicad can be shared with anyone who has either a mobile device or desktop computer. The BIMx Desktop Viewer is a native Mac/Win application that allows you to explore architectural designs interactively through the BIM model on desktop computers and notebooks.
In either case, simply move the files you want to reuse into a library modulethen add the library as a dependency for each app module. This pageteaches you how to do both.
Create a library module
Ouvrir Rar Android Download
To create a new library module in your project, proceed as follows:
- Click File > New > New Module.
- In the Create New Module window that appears,click Android Library, then click Next.
There's also an option to create a Java Library, whichbuilds a traditional JAR file. While a JAR file is useful for many projects—especially when you want to share code with other platforms—it does notallow you to include Android resources or manifest files, which is very usefulfor code reuse in Android projects. So this guide focuses on creating Androidlibraries.
- Give your library a name and select a minimum SDK version for the codein the library, then click Finish.
Once the Gradle project sync completes, the library module appears inthe Project panel on the left. If you don't see the new modulefolder, make sure it's displaying the Android view.
Convert an app module to a library module
An Android library is structurally the same as an Android app module.It can include everything needed to build an app, including source code,resource files, and an Android manifest.However, instead of compiling into an APK that runs on a device,an Android library compiles into an Android Archive (AAR) file that you can useas a dependency for an Android app module. Unlike JAR files, AAR files offerthe following functionality for Android applications:
- AAR files can contain Android resources and a manifest file, which allowsyou to bundle in shared resources like layouts and drawables in additionto Java classes and methods.
- AAR files can contain C/C++ librariesfor use by the app module's C/C++ code.
A library module is useful in the following situations:
- When you're building multiple apps that use some ofthe same components, such as activities, services, or UI layouts.
- When you're building an app that exists in multiple APK variations, such asa free and paid version and you need the same core components in both.
Ouvrir Rar Android App
An Android library is structurally the same as an Android app module. It can include everything needed to build an app, including source code, resource files, and an Android manifest. However, instead of compiling into an APK that runs on a device, an Android library compiles into an Android Archive (AAR) file that you can use as a dependency. BIMx Mobile app BIMx Desktop Viewer BIMx Hyper-models created with GRAPHISOFT Archicad can be shared with anyone who has either a mobile device or desktop computer. The BIMx Desktop Viewer is a native Mac/Win application that allows you to explore architectural designs interactively through the BIM model on desktop computers and notebooks.
In either case, simply move the files you want to reuse into a library modulethen add the library as a dependency for each app module. This pageteaches you how to do both.
Create a library module
Ouvrir Rar Android Download
To create a new library module in your project, proceed as follows:
- Click File > New > New Module.
- In the Create New Module window that appears,click Android Library, then click Next.
There's also an option to create a Java Library, whichbuilds a traditional JAR file. While a JAR file is useful for many projects—especially when you want to share code with other platforms—it does notallow you to include Android resources or manifest files, which is very usefulfor code reuse in Android projects. So this guide focuses on creating Androidlibraries.
- Give your library a name and select a minimum SDK version for the codein the library, then click Finish.
Once the Gradle project sync completes, the library module appears inthe Project panel on the left. If you don't see the new modulefolder, make sure it's displaying the Android view.
Convert an app module to a library module
If you have an existing app module with all the code you want to reuse,you can turn it into a library module as follows:
- Open the module-level
build.gradle
file. - Delete the line for the
applicationId
. Only an Android app module can define this. - At the top of the file, you should see the following:
Minecraft vr edition apk. Change it to the following:
- Save the file and click File > Sync Project with Gradle Files.
That's it. The entire structure of the module remains the same, but it nowoperates as an Android library and the build will now create an AAR fileinstead of an APK.
When you want to build the AAR file, select the library module in theProject window and then click Build > Build APK.
Add your library as a dependency
To use your Android library's code in another app module, proceed asfollows:
- Add the library to your project in either of the following ways (if youcreated the library module within the same project, then it's already there andyou can skip this step):
- Add the pre-built AAR (or JAR) file:
- Click File > New > New Module.
- Click Import .JAR/.AAR Package then click Next.
- Enter the location of the compiled AAR or JAR file then click Finish.
- Import the library module with source code to your project (the library source becomes part of your project):
- Click File > New > Import Module.
- Enter the location of the library module directory then click Finish.
The library module with source code is copied to your project, so you can actually edit the library code. If you want to maintain a single version of the library code, then this is probably not what you want and you should instead add the compiled AAR file as described above.
Android Studio creates a module directory, copies the AAR into the module, and generates a
build.gradle
file for the AAR/JAR, with the following contents: - Add the pre-built AAR (or JAR) file:
- Make sure the library is listed at the top of your
settings.gradle
file, as shown here for a library named'my-library-module': - Open the app module's
build.gradle
file and add a new line to thedependencies
block as shown in the following snippet: - Click Sync Project with Gradle Files.
In this example above, the implementation
configuration adds thelibrary namedmy-library-module
as a build dependency for the entire app module.If you instead want thelibrary only for a specific build variant, then instead of implementation
, usebuildVariantNameImplementation
. For example, if you want toinclude the library only in your 'pro' product flavor, it looks like this:
Any code and resources in the Android library is now accessible to yourapp module, and the library AAR file is bundled into your APK at build time.
However, if you want to share your AAR file separately, you can find it inproject-name/module-name/build/outputs/aar/
and you can regenerate it by clicking Build > Make Project.
Note: To learn more about dependency management, read Use variant-aware dependency management.
Choose resources to make public
All resources in a library default to public. To make all resourcesimplicitly private, you must define at least one specific attribute as public.Resources include all files in your project's res/
directory, suchas images. To prevent users of your library from accessing resources intendedonly for internal use, you should use this automatic private designationmechanism by declaring one or more public resources. Alternately, you can makeall resources private by adding an empty tag , whichmarks nothing as public, which makes everything else (all resources) private.
To declare a public resource, add a declaration to your library's
public.xml
file. If you haven't added public resources before, you need to create thepublic.xml
file in the res/values/
https://torrentpak.mystrikingly.com/blog/movavi-screen-recorder-studio-10-activation-key. directory of your library.
The following example code creates two public string resources with the namesmylib_app_name
and mylib_public_string
:
You should make public any resources that you want to remain visible to developers using your library.
Implicitly making attributes private not only prevents users of your libraryfrom experiencing code completion suggestions from internal library resourcesbut also allows you to rename or remove private resources without breakingclients of your library. Private resources are filtered out of code completion,and Lint warns you when you try toreference a private resource.
When building a library, the Android Gradle plugin gets the public resource definitions and extractsthem into the public.txt
file, which is then packaged inside the AAR file.
Development considerations for library modules
As you develop your library modules and dependent apps, be aware of thefollowing behaviors and limitations.
Once you have added references to library modules to your Android app module,you can set their relative priority. At build time, thelibraries are merged with the app one at a time, starting from the lowest priority tothe highest.
Resource merge conflicts
The build toolsmerge resources from a library module with those of a dependent app module. Ifa given resource ID is defined in both modules, the resource from the app isused.
If conflicts occur between multiple AAR libraries, then the resource from thelibrary listed first in the dependencies list (toward the top of the
dependencies
block) is used.To avoid resource conflicts for common resource IDs, consider using a prefixor other consistent naming scheme that is unique to the module (or is uniqueacross all project modules).
In multi-module builds, JAR dependencies are treated as transitive dependencies
When you add a JAR dependency to a library project that outputs an AAR, the JAR is processed by the library module and packaged with its AAR.
However, if your project includes a library module that is consumed by an app module, the app module treats the library's local JAR dependency as a transitive dependency. In this case, the local JAR is processed by the app module that consumes it, and not by the library module. This is to speed up incremental builds that are caused by changes to a library's code.
Any Java resource conflicts caused by local JAR dependencies must be resolved in the app module that consumes the library.
Wondershare mobiletrans 6 9 11 30. A library module can depend on an external JAR library
You can develop a library module that depends on an external library. (forexample, the Maps external library). In this case, the dependent app must buildagainst a target that includes the external library (for example, the GoogleAPIs Add-On). Note also that both the library module and the dependent app mustdeclare the external library in their manifest files, in a
element.
The app module's
minSdkVersion
must be equal to orgreater than the version defined by the libraryhttps://abxqt.over-blog.com/2021/01/appcode-2019-1-1.html. A library is compiled as part of the dependent app module, so the APIs usedin the library module must be compatible with the platform version that the appmodule supports.
Each library module creates its own R class
When you build the dependent app modules, library modules are compiled intoan AAR file then added to the app module. Therefore, each library has its own
R
class, named according to the library's package name. TheR
class generated from main module and the library module iscreated in all the packages that are needed including the main module's packageand the libraries' packages.A library module may include its own ProGuard configuration file
If you have a library project that you use to build and publish an AAR, youcan add a ProGuard configuration file to your library's build configuration andthe Android Gradle plugin applies the ProGuard rules that you have specified.The build tools embed this file within the generated AAR file for the librarymodule. When you add the library to an app module, the library's ProGuard filegets appended to the ProGuard configuration file (
proguard.txt
) ofthe app module.Iphone simulator online. By embedding a ProGuard file in your library module, you ensure thatapp modules that depend on your library do not have to manually update theirProGuard files to use your library. When the Android Studio build system buildsyour app, it uses the directives from both the app module and the library. So,there's no need to run a code shrinker on the library in a separate step.
All free slots for fun. To add the ProGuard rules to your library project, you must specify the file'sname with
consumerProguardFiles
property, inside thedefaultConfig
block of your library'sbuild.gradle
file. For example, thefollowing snippet setslib-proguard-rules.txt
as the library'sProGuard configuration file:Champions online launcher. However, if your library module is a part of a multi-module build that compiles into an APK and does not generate an AAR, you should run code shrinking on only the app module that consumes the library. To learn more about ProGuard rules and their usage, read Shrink, obfuscate, and optimize your app.
Testing a library module is the same as testing an app
The main difference is that the library and its dependencies are automatically included as dependencies of the test APK. This means that the test APK includes not only its own code, but also the library's AAR and all its dependencies. Because there is no separate 'app under test,' the
androidTest
task installs (and uninstalls) only the test APK.When merging multiple manifest files, Gradle follows the default priority order and merges the library's manifest into the test APK's main manifest.
Anatomy of an AAR file
The file extension for an AAR file is .aar
, and the Maven artifact type shouldbe aar
as well. The file itself is a zip file. The only mandatory entry is/AndroidManifest.xml
.
Additionally, an AAR file may include one or more of the following optionalentries:
/classes.jar
/res/
/R.txt
/public.txt
/assets/
/libs/name.jar
/jni/abi_name/name.so
(where abi_name is one of the Androidsupported ABIs)/proguard.txt
/lint.jar
/api.jar
/prefab/
for exporting native libraries