By appending the artifact packaging, you are telling Gradle's resolver to
skip looking at the pom.xml that defines the metadata for the artifact.
This metadata includes the default packaging (in this case, aar) and more
importantly it also includes information on dependencies which are resolved
transitively by default.
In your case, when you incorrectly explicitly include the packaging in the
dependency (the "@aar" part), you are not getting AppCompat's dependency on
the support-v4 library.
You almost never want to specify explicit packaging.
On Thu Feb 19 2015 at 1:45:43 PM Tomáš Procházka <tomas.procha...@gmail.com>
wrote:
> I'm confused. What is difference between
>
> dependencies {
> compile 'com.android.support:appcompat-v7:21.0.3@aar'
> }
>
> and
>
> dependencies {
> compile 'com.android.support:appcompat-v7:21.0.3'
> }
>
> I thinked that if I skip @aar gradle will tray to use jar dependency, but
> appcompat doesn't have jar type, only aar.
> So I'm using @aar, but it doesn't work sometimes, for example here
>
>
> https://github.com/avast/android-styled-dialogs/blob/master/library/build.gradle#L22
>
> If I add @arr here it fail
>
> android-styled-dialogs\library\src\main\java\com\avast\android\dialogs\core\BaseDialogBuilder.java:5:
> error: package android.support.v4.app does not exist
> import android.support.v4.app.DialogFragment;
> ^
> android-styled-dialogs\library\src\main\java\com\avast\android\dialogs\core\BaseDialogBuilder.java:6:
> error: package android.support.v4.app does not exist
> import android.support.v4.app.Fragment;
> ^
> android-styled-dialogs\library\src\main\java\com\avast\android\dialogs\core\BaseDialogBuilder.java:7:
> error: package android.support.v4.app does not exist
> import android.support.v4.app.FragmentManager;
>
> I don't understand why it sometimes works and sometimes not.
> I'm asking because of this
>
> http://forums.gradle.org/gradle/topics/missing-in-deployed-pom-files-if-different-than-jar-artifact-is-used
> I want to force propagate <type>aad</type> to the generated pom.xml
>
>
>
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