Cannot build osmdroid repository

I have cloned the osmdroid repository from
https://github.com/osmdroid/osmdroid
and I am unable to get it to build. I'm focussed on the OpenStreetMapViewer project in the repository.

I think the source of the problem is that I cannot use maven because I am behind a firewall. For all Android Studio projects I have created or cloned, I have to modify the build.gradle by removing

and instead use:

jcenter {

    url "http://jcenter.bintray.com/"

}

For this project, includes this line in the block:

dependencies {

    compile 'com.android.support:appcompat-v4:22.2.+'

    compile 'org.osmdroid:osmdroid-android:4.3'

    compile 'org.osmdroid:osmdroid-third-party:4.3'

}

However, browsing jcenter here:
https://bintray.com/bintray/jcenter
I do not see v4, only v7 (android-support-v7-appcompat)

I tried v7 as a dependency:

compile 'com.android.support:appcompat-v7:23.0.1'

which the requires changing the to 23.

Doing that I get this build error:

Error:A problem occurred configuring root project 'OpenStreetMapViewer'.

> Could not resolve all dependencies for configuration ':_debugCompile'.

   > Could not resolve android.support:compatibility-v4:21.0.3.

     Required by:

         :OpenStreetMapViewer:unspecified > org.osmdroid:osmdroid-third-party:4.3

      > Could not GET 'https://repo1.maven.org/maven2/android/support/compatibility-v4/21.0.3/compatibility-v4-21.0.3.pom'.

         > peer not authenticated

   > Could not resolve com.google.android.gms:google-play-services:22.0.0.

     Required by:

         :OpenStreetMapViewer:unspecified > org.osmdroid:osmdroid-third-party:4.3

      > Could not GET 'https://repo1.maven.org/maven2/com/google/android/gms/google-play-services/22.0.0/google-play-services-22.0.0.pom'.

         > peer not authenticated

So it appears that osmdroid really needs v4, not v7

In the Android SDK Manager, I have installed Extras > Android Support Repository 22 and > Android Support Library 23.0.1

What can I do?

Edit -------------------------------------------

I guess I should have started the question with the error the occurs when attempting to import the project without modifying any build.gradle or manifest. The point being that the instructions on "How to Maven" don't work in this case.

Error: Cause: peer not authenticated

Untrusted Server's certificate - Server's certificate not trusted.

Issued to: Common Name plugins.jetgrains.com

Organization: Jetbrains.s.r.o

Locality: Praha 4 - Nusle

Country: CZ

ST: Praha 4 - Nusle

Edit 2 --------------------------------------------------------------

As stated previously, I cloned osmdroid from here:

https://github.com/osmdroid/osmdroid

I set the system environment variable M2_HOME to the location of the cloned osmdroid project.

In settings.xml:

<localRepository>D:\Users\myusername\AndroidstudioProjects\maven-android-sdk-deployer</localRepository>

I downloaded maven from here:

http://maven.apache.org/download.cgi

Unzipped D:\Program Files\apache-maven-3.3.3\bin, which I then also included in the system variable.

In a DOS window, I go to M2_HOME and execute this command:

mvn install

I get this error:

[INFO] Scanning for projects...

Downloading: https://repo.maven.apache.org/maven2/com/simpligility/maven/progressive-organization-pom/3.0.0/progressive-organization-pom-3.0.0.pom



[ERROR] Some problems were encountered while processing the POMs:

[FATAL] Non-resolvable parent POM for com.simpligility.android.sdk-deployer:maven-android-sdk-deployer:2.8.0: Could not transfer artifact com.simpligility.maven:progressive-organization-pom:pom:3.0.0 from/to central (https://repo.maven.apache.org/maven2): 

sun.security.validator.ValidatorException: 

PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: 

unable to find valid certification path to requested target and 'parent.relativePath' points at wrong local POM @ line 5, column 11

@ 

The build could not read 1 project -> [Help 1]



The project com.simpligility.android.sdk-deployer:maven-android-sdk-deployer:2.8.0 (D:\maven-android-sdk-deployer\pom.xml) has 1 error

Non-resolvable parent POM for com.simpligility.android.sdk-deployer:maven-android-sdk-deployer:2.8.0: Could not transfer artifact com.simpligility.maven:progressive-organization-pom:pom:3.0.0 from/to central (https://repo.maven.apache.org/maven2): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: 

unable to find valid certification path to requested target and 'parent.relativePath' points at wrong local POM @ line 5, column 11 -> [Help 2]



[Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException

[Help 2] http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException

Edit 3 -----------------------------------------------------------

In , I added:

<localRepository>D:\Users\myusername\AndroidstudioProjects\maven-android-sdk-deployer</localRepository>

This didn't make any difference. Is it correct to do this?

Edit 4 ------------------------------------------------------------
Tried adding parameters to the command for certs:

mvn install -Dmaven.wagon.http.ssl.insecure=true -Dmaven.wagon.http.ssl.allowall=true -Dmaven.wagon.http.ssl.ignore.validity.dates=true

Edit 5 -------------------------------------------------------------

All of the above may have been necessary but not sufficient. What got it working was having the network persons add an exception to the firewall for maven and adding Sun Certs.
http://www.mkyong.com/webservices/jax-ws/suncertpathbuilderexception-unable-to-find-valid-certification-path-to-requested-target/

Edit 6 --------------------------------------------------------------

Set M2_HOME to location of maven, e.g.:

C:\Program Files (x86)\apache-maven-3.3.9\
Add location of mvn command to Path in System variables:

C:\Program Files (x86)\apache-maven-3.3.9\bin