Publish to oss.sonatype.org staging repository

gradle clean
# edit build.gradle to update allprojects.version
# edit gradle.properties to update VERSION_NAME and VERSION_CODE
# edit CHANGELOG.md and add changes for published version
# edit sample/src/main/AndroidManifest.xml and update both versionCode and versionName attributes
# edit README.md and update paths, latest version, repository links and sample codes
gradle check
# fix all possible errors and warnings before publishing
cd library
# publishing only library, so following tasks are run in "library" sub-folder
gradle generateJavadocJar
# this will create javadoc archive check the contents via following cmd (use different name and/or path if needed)
# jar -tf ./library/build/libs/android-async-http-null-Release-1.4.11-javadoc.jar
gradle publish

Publish to maven central

For Nexus Repository Manager 2.14+

Login into https://oss.sonatype.org/
Navigation, choose Build Promotion > Staging Repositories
Explore if repo was automatically created and if contents do match expectations
Select repository and use "Close" action, to run pre-publishing checks
Wait a bit
Refresh the panel with repositories
Select repository and use "Release" action, if not available, there are issues, that need to be fixed before publishing

In GIT

example code using 1.4.11 as released version

git tag 1.4.11
git push origin --tags

Github

in releases https://github.com/android-async-http/android-async-http/releases

Create new release from appropriate tag (see GIT above)
Describe in similar terms as in CHANGELOG.md what is being done
Upload JAR (library, sources and javadoc) and AAR (library) along with the release
Publish by saving form