Configuring travis to build Android. (#206)

.travis.yml

@@ -1,6 +1,8 @@
 os:
   - linux
-sudo: false
+dist: trusty
+language: android
+
 addons:
   apt:
     sources:
@@ -8,23 +10,35 @@ addons:
     packages:
       - libstdc++6
       - fonts-noto
+
 git:
   depth: 3
+
+android:
+  components:
+    - build-tools-28.0.3
+    - android-28
+
 env:
   - FLUTTER_VERSION=stable
   - FLUTTER_VERSION=beta
-matrix:
+
+jobs:
   allow_failures:
     - env: FLUTTER_VERSION=beta
+
 before_script:
   - git clone https://github.com/flutter/flutter.git -b $FLUTTER_VERSION
   - ./flutter/bin/flutter doctor
   - chmod +x travis_script.sh
+
 script:
   - ./travis_script.sh
+
 cache:
   directories:
     - $HOME/shared/.pub-cache
+
 notifications:
   email:
     brogdon+github@gmail.com

add_to_app/android_fullscreen/app/build.gradle

@@ -6,7 +6,6 @@ apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion 28
-    buildToolsVersion "29.0.2"
     defaultConfig {
         applicationId "dev.flutter.example.androidfullscreen"
         minSdkVersion 19

add_to_app/android_using_plugin/app/build.gradle

@@ -6,7 +6,6 @@ apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion 28
-    buildToolsVersion "29.0.2"
     defaultConfig {
         applicationId "dev.flutter.example.androidusingplugin"
         minSdkVersion 19

add_to_app/android_using_prebuilt_module/app/build.gradle

@@ -6,7 +6,6 @@ apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion 28
-    buildToolsVersion "29.0.2"
     defaultConfig {
         applicationId "dev.flutter.example.androidusingprebuiltmodule"
         minSdkVersion 19

add_to_app/flutter_module/lib/main.dart

@@ -23,7 +23,7 @@ void main() {
 }
 
 /// A simple model that uses a [MethodChannel] as the source of truth for the
-/// state of the counter.
+/// state of a counter.
 ///
 /// Rather than storing app state data within the Flutter module itself (where
 /// the native portions of the app can't access it), this module passes messages

add_to_app/flutter_module/test/widget_test.dart

@@ -9,13 +9,28 @@ import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 import 'package:flutter_module/main.dart';
+import 'package:provider/provider.dart';
+
+class MockCounterModel extends ChangeNotifier implements CounterModel {
+  int _count = 0;
+
+  int get count => _count;
+
+  void increment() {
+    _count++;
+    notifyListeners();
+  }
+}
 
 void main() {
   testWidgets('MiniView smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
     await tester.pumpWidget(
       MaterialApp(
-        home: Contents(),
+        home: ChangeNotifierProvider<CounterModel>.value(
+          value: MockCounterModel(),
+          child: Contents(),
+        ),
       ),
     );
 

add_to_app/flutter_module_using_plugin/lib/main.dart

@@ -24,7 +24,7 @@ void main() {
 }
 
 /// A simple model that uses a [MethodChannel] as the source of truth for the
-/// state of the counter.
+/// state of a counter.
 ///
 /// Rather than storing app state data within the Flutter module itself (where
 /// the native portions of the app can't access it), this module passes messages

add_to_app/flutter_module_using_plugin/test/widget_test.dart

@@ -9,13 +9,28 @@ import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 import 'package:flutter_module_using_plugin/main.dart';
+import 'package:provider/provider.dart';
+
+class MockCounterModel extends ChangeNotifier implements CounterModel {
+  int _count = 0;
+
+  int get count => _count;
+
+  void increment() {
+    _count++;
+    notifyListeners();
+  }
+}
 
 void main() {
   testWidgets('MiniView smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
     await tester.pumpWidget(
       MaterialApp(
-        home: Contents(),
+        home: ChangeNotifierProvider<CounterModel>.value(
+          value: MockCounterModel(),
+          child: Contents(),
+        ),
       ),
     );
 

travis_script.sh

@@ -1,18 +1,31 @@
 set -e
 
-# Backs up one directory at a time, looking for one called "flutter".
+# Backs up one directory at a time, looking for one called "flutter". Once it
+# finds that directory, an absolute path to it is returned.
 function getFlutterPath() {
-    local path=".."
+    local path=""
     local counter=0
 
     while [[ "${counter}" -lt 10 ]]; do
-        [ -d "${path}/flutter" ] && echo "${path}/flutter" && return 0
+        [ -d "${path}flutter" ] && echo "$(pwd)/${path}flutter" && return 0
         let counter++
-        path="${path}/.."
+        path="${path}../"
     done
 }
 
-declare -a  PROJECT_NAMES=(
+localSdkPath=$(getFlutterPath)
+
+if [ -z "$localSdkPath" ]
+then
+    echo "Failed to find the Flutter SDK!."
+    exit 1
+fi
+
+echo "Flutter SDK found at ${localSdkPath}"
+
+declare -a PROJECT_NAMES=(
+    "add_to_app/flutter_module" \
+    "add_to_app/flutter_module_using_plugin" \
     "animations" \
     "chrome-os-best-practices" \
     "gallery/gallery" \
@@ -32,14 +45,6 @@ do
     echo "== Testing '${PROJECT_NAME}' on Flutter's $FLUTTER_VERSION channel =="
     pushd "${PROJECT_NAME}"
 
-    localSdkPath=$(getFlutterPath)
-    
-    if [ -z "$localSdkPath" ]
-    then 
-        echo "Failed to find Flutter SDK for '${PROJECT_NAME}'."
-        exit 1
-    fi
-
     # Run the analyzer to find any static analysis issues.
     "${localSdkPath}/bin/flutter" analyze
 
@@ -52,4 +57,26 @@ do
     popd
 done
 
+echo "Building the aar files for 'flutter_module'."
+pushd add_to_app/flutter_module
+"${localSdkPath}/bin/flutter" build aar
+popd
+
+declare -a ANDROID_PROJECT_NAMES=(
+    "add_to_app/android_fullscreen" \
+    "add_to_app/android_using_plugin" \
+    "add_to_app/android_using_prebuilt_module" \
+)
+
+for PROJECT_NAME in "${ANDROID_PROJECT_NAMES[@]}"
+do
+    echo "== Testing '${PROJECT_NAME}' on Flutter's $FLUTTER_VERSION channel =="
+    pushd "${PROJECT_NAME}"
+
+    ./gradlew assembleDebug
+    ./gradlew assembleRelease
+
+    popd
+done
+
 echo "-- Success --"