Tried initial coveralls config.

.travis.yml

@@ -2,7 +2,10 @@ language: java
 jdk: oraclejdk7
 before_install:
  - chmod +x gradlew
-script: ./gradlew clean build
+script:
+- ./gradlew clean build
+after_success:
+- ./gradlew jacocoTestReport coveralls
 before_cache:
   - rm -f $HOME/.gradle/caches/modules-2/modules-2.lock
 cache:

build.gradle

@@ -2,6 +2,12 @@ buildscript {
     repositories {
         jcenter()
         mavenCentral()
+        maven {
+            url "https://plugins.gradle.org/m2/"
+        }
+    }
+    dependencies {
+        classpath "org.kt3k.gradle.plugin:coveralls-gradle-plugin:2.6.3"
     }
 }
 

library/rx/build.gradle

@@ -1,5 +1,7 @@
 apply plugin: 'java'
 apply plugin: 'com.novoda.bintray-release'
+apply plugin: 'jacoco'
+apply plugin: 'com.github.kt3k.coveralls'
 
 buildscript {
     repositories {
@@ -15,6 +17,13 @@ repositories {
     maven { url "https://dl.bintray.com/amatkivskiy/maven/"}
 }
 
+jacocoTestReport {
+    reports {
+        xml.enabled = true // coveralls plugin depends on xml format report
+        html.enabled = true
+    }
+}
+
 publish {
     groupId = 'com.github.amatkivskiy'
     artifactId = 'gitter.sdk.rx'