[ci] Configure CircleCI

.circleci/config.yml

@@ -0,0 +1,29 @@
+version: 2
+jobs:
+  build:
+    working_directory: ~/code
+    docker:
+      - image: circleci/android:api-28-alpha
+    environment:
+      JVM_OPTS: -Xmx3200m
+    steps:
+      - checkout
+      - restore_cache:
+          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
+      - run:
+          name: Chmod permissions #if permission for Gradlew Dependencies fail, use this.
+          command: sudo chmod +x ./gradlew
+      - run:
+          name: Download Dependencies
+          command: ./gradlew androidDependencies
+      - save_cache:
+          paths:
+            - ~/.gradle
+          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
+      - run:
+          name: Build App
+          command: ./gradlew assembleGreen
+      - store_artifacts:
+          path: app/build/outputs/apk/green/debug
+          prefix: apk
+      # See https://circleci.com/docs/2.0/deployment-integrations/ for deploy examples

app/build.gradle

@@ -29,13 +29,20 @@ android {
             }
         }
     }
+    signingConfigs {
+        debug {
+            storeFile file('../debug.keystore')
+        }
+    }
     buildTypes {
         release {
             minifyEnabled true
             shrinkResources true
             proguardFiles 'proguard-rules.pro'
         }
-        debug {}
+        debug {
+            signingConfig signingConfigs.debug
+        }
     }
 
     flavorDimensions "color"