From an idea to your first tested app

How do you start with an Android app? Which are the tools you need and the concepts you need to learn to quickly prototype someting working?What are the best tools for testing and using Continuous integration for Android?

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1. From an idea to your first (tested) app Chiara Chiappini @chiarachiappini google.com/+chiarachiappini
2. rainy London... @chiarachiappini
3. @chiarachiappini
4. @chiarachiappini
5. Android Studio official IDE for Android application development @chiarachiappini
6. Android Studio official IDE for Android application development based on IntelliJ IDEA @chiarachiappini
7. Android Studio official IDE for Android application development based on IntelliJ IDEA layout editor @chiarachiappini
8. Android Studio official IDE for Android application development based on IntelliJ IDEA layout editor flexible Gradle-based build system @chiarachiappini
9. Gradle build automation tool @chiarachiappini
10. Gradle build automation tool cross platform builds @chiarachiappini
11. Gradle build automation tool cross platform builds dependency management @chiarachiappini
12. Gradle build automation tool cross platform builds dependency management integration with Android Studio @chiarachiappini
13. Gradle build automation tool cross platform builds dependency management integration with Android Studio Gradle Wrapper to ensure everyone in the team is using the same version @chiarachiappini
14. Layout @chiarachiappini <RelativeLayout ...> <Toolbar android:id="@+id/weather_toolbar".../> <LinearLayout android:id="@+id/weather_info_layout".../> <TextView android:id="@+id/weather_description".../> <TextView android:id="@+id/weather_temp".../> <View .../> <ImageView android:id="@+id/weather_icon".../> </LinearLayout </RelativeLayout >
15. <Toolbar android:id="@+id/weather_toolbar".../> <LinearLayout android:id="@+id/weather_info_layout".../> <TextView android:id="@+id/weather_description".../> <TextView android:id="@+id/weather_temp".../> <ImageView android:id="@+id/weather_icon".../> @chiarachiappini @chiarachiappini
16. Activity protected void onCreate(Bundle savedInstanceState) { ........ toolbar = (Toolbar) findViewById(weather_toolbar); toolbar.setTitle("Richmond"); setSupportActionBar(toolbar); tempView =(TextView) findViewById(weather_temp); tempView.setText("15"); descriptionView = (TextView) findViewById(weather_description); descriptionView.setText("Sun is shining"); iconView = (ImageView) findViewById(weather_icon); iconView.setImageResource(R.drawable.sun);
17. new features new coworkers @chiarachiappini
18. I need testing @chiarachiappini
19. @chiarachiappini Modules
20. @chiarachiappini
21. JUnit tests @chiarachiappini
22. public class WeatherOracleTest { private WeatherOracle weatherOracle; @Before public void setup(){ weatherOracle = new WeatherOracle(); } @Test public void shouldReturnASunnyWeather(){ Weather expectedWeather = new Weather(SUN_IS_SHINING, TEMPERATURE, ICON_ID); assertEquals(expectedWeather, weatherOracle.getWeather()); } }
23. assertEquals(expectedWeather, weatherOracle.getWeather()); } public class WeatherOracle { public static final String SUN_IS_SHINING = "Sun is shining"; public static final double TEMPERATURE = 15.0; public static final String ICON_ID = "sun"; public Weather getWeather() { return new Weather(SUN_IS_SHINING, TEMPERATURE, ICON_ID); } } @chiarachiappini
24. Android Unit tests @chiarachiappini
25. public class WeatherIconMapperTest { private static final String A_WEATHER_DESCRIPTION = "aWeatherDescription"; private static final double A_WEATHER_TEMPERATURE = 15.0; private static final String SUN_ICON_ID = "sun"; @Test public void shouldReturnTheRightIconWhenSunny() throws IconNotFoundException { Weather weather = new Weather(A_WEATHER_DESCRIPTION, A_WEATHER_TEMPERATURE, SUN_ICON_ID); int expectedIcon = R.drawable.sun; assertEquals(expectedIcon, WeatherIconMapper.getIconResourceIdForWeather(weather)); } }
26. public class WeatherIconMapper { public static int getIconResourceIdForWeather(Weather weather) throws IconNotFoundException { if(weather.getWeatherIconId().equals("sun")) { return R.drawable.sun; } throw new IconNotFoundException(); } } assertEquals(expectedIcon, WeatherIconMapper.getIconResourceIdForWeather(weather));
27. Testing Activities? @chiarachiappini
28. Robolectric http://robolectric.org/ @chiarachiappini
29. @RunWith(RobolectricGradleTestRunner.class) @Config(constants = BuildConfig.class, sdk = 21) public class MainActivityTest { @Before public void setUp() throws Exception { mainActivity = Robolectric.buildActivity(MainActivity.class).create().get(); } @Test public void testMainActivity() { assertNotNull(mainActivity.findViewById(R.id.weather_toolbar)); assertNotNull(mainActivity.findViewById(R.id.weather_description)); …. } }
30. Functional testing Espresso Selendroid Calabash Appium ….. @chiarachiappini
31. Espresso @chiarachiappini
32. public class MainActivityTest { @Rule public ActivityTestRule<MainActivity> activityRule = new ActivityTestRule<> (MainActivity.class); @Test public void showTemperature() { onView(withId(R.id.weather_temp)) .check(matches(withText("15"))); } @chiarachiappini
33. Testing and CI @chiarachiappini
34. Continuous Integration early feedback @chiarachiappini
35. Continuous Integration early feedback team peace of mind and alerting @chiarachiappini
36. Continuous Integration early feedback team peace of mind and alerting standardized build @chiarachiappini
37. Continuous Integration early feedback team peace of mind and alerting standardized build record of results @chiarachiappini
38. Continuous Integration early feedback team peace of mind and alerting standardized build record of results support release process @chiarachiappini
39. Continuous Integration early feedback team peace of mind and alerting standardized build record of results support release process first step to continuous deployment @chiarachiappini
40. CI alternatives Travis CI Jenkins Circle CI ... @chiarachiappini
41. Travis free for public repositories @chiarachiappini
42. Travis free for public repositories community boxes and queues @chiarachiappini
43. Travis free for public repositories community boxes and queues subscription for no waiting and concurrent jobs @chiarachiappini
44. @chiarachiappini
45. steps go to Travis CI @chiarachiappini
46. steps go to Travis CI sign in with GitHub user @chiarachiappini
47. steps go to Travis CI sign in with GitHub user activate GitHub webhook @chiarachiappini
48. steps go to Travis CI sign in with GitHub user activate GitHub webhook add .travis.yml to your repository @chiarachiappini
49. .travis.yml @chiarachiappini language: android jdk: oraclejdk7 env: matrix: - ANDROID_TARGET=android-23 ANDROID_ABI=armeabi-v7a … script: - ./gradlew clean test
50. Ready to start? Tools @chiarachiappini
51. Ready to start? Tools Android concepts (Layout, Activity..) @chiarachiappini
52. Ready to start? Tools Android concepts (Layout, Activity..) Testing (Unit, UI) @chiarachiappini
53. Ready to start? Tools Android concepts (Layout, Activity..) Testing (Unit, UI) Continuous Integration @chiarachiappini
54. questions? @chiarachiappini