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:. That's it. The entire structure of the module remains the same, but it now operates as an Android library and the build will now create an AAR file instead of an APK.
To use your new Android library's code in another app or library module within the same project, add a project-level dependency:. Select the configuration that requires this dependency, or select "implementation" if it applies to all configurations, and click OK.
The recommended way to share dependencies JARs and AARs is with a Maven repository, either hosted on a service such as Maven Central or with a directory structure on your local disk. For more information on using Maven repositories, see Remote repositories. When an Android library is published to a Maven repository, metadata is included so that the dependencies of the library are included in the consuming build, which allows the library to be automatically deduplicated if it is used in multiple places.
In the Add Library Dependency dialog, use the search box to find the library to add. This form searches the repositories specified in the project's build files in the repositories block.
Select the configuration that requires this dependency, or select "implementation" if it applies to all configurations. If the library should be available to all configurations, select the "implementation" configuration. For example:. For more about adding Gradle dependencies, see Add build dependencies. All resources in a library default to public. To make all resources implicitly private, you must define at least one specific attribute as public. To prevent users of your library from accessing resources intended only for internal use, you should use this automatic private designation mechanism by declaring one or more public resources.
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 library from experiencing code completion suggestions from internal library resources but also allows you to rename or remove private resources without breaking clients of your library.
Private resources are filtered out of code completion, and Lint warns you when you try to reference a private resource. When building a library, the Android Gradle plugin gets the public resource definitions and extracts them into the public.
As you develop your library modules and dependent apps, be aware of the following 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, the libraries are merged with the app one at a time, starting from the lowest priority to the highest. The build tools merge resources from a library module with those of a dependent app module. If a given resource ID is defined in both modules, the resource from the app is used.
If conflicts occur between multiple AAR libraries, then the resource from the library 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 prefix or other consistent naming scheme that is unique to the module or is unique across all project modules. In multi-module builds, JAR dependencies are treated as transitive dependencies. 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.
As a general rule, place DNs in the same AAR group if they share all of the following characteristics:. A common off-net access code for example, 9. A common External Phone Number Mask format. For example, assume that both the San Francisco and New York sites share all of the preceding characteristics. For phone A in San Francisco to reach phone B in New York at , the AAR group configuration prefixes 91 to the dialed string, yielding a completed string of Select the Proper Dial Plan and Route.
AAR calls should egress through a gateway within the same location as the calling phone, thus causing to the completed dial string be sent through the origination site's dial plan. A gradle plugin that merge dependencies into the final aar file works with AGP 3.
The solution of merging aar works with AGP 3. Tested in AGP 3. JCenter services will be deprecated on May 1st , if you are using the version in JCenter, it is recommended to rename the group name and switch to Maven Central.
Like this: 'com. Declare embed for the dependencies you want to merge in build. If you want to include local transitive dependencies in final artifact, you must add embed for transitive dependencies in your main library. For example, mainLib depend on subLib1, subLib1 depend on subLib2, If you want include all dependencies in the final artifact, you must add embed for subLib1 and subLib2 in mainLib build.
If you want to inlcude all of the remote transitive dependencies which are in POM file, you need change the transitive value to true in your build. If you change the transitive value to true,and want to ignore a dependency in its POM file, you can add exclude keywords, like this:. More usage see example. AAR is a file format for android library.
The file itself is a zip file that containing useful stuff in android. See anatomy of an aar file here.
0コメント