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Development guides

This document contains some instructions about developing this application.

Required software

You need to have the following software installed:

  • Java 11
  • Gradle 6.5
  • Android SDK (API level 30)
  • Git
  • Android Studio 4.1.2

Preferred operating system is Ubuntu.

Android frameworks used

The following Android frameworks / libraries are used in this application:

Some instructions for using Robolectric:

Project installation and configuration

  1. Checkout the sources from GitHub: git clone git@github.com:mvestola/helsinki-testbed2-android.git
  2. Open the project with Android Studio and run gradle command build to build the project.

You should also set the Android SDK to environmental variable "ANDROID_HOME"

To sign a release version of the application, you need to have a file ~/.gradle/gradle.properties with the following content:

RELEASE_STORE_FILE=/your/store/file/location
RELEASE_STORE_PASSWORD=your_store_password
RELEASE_KEY_ALIAS=your_alias
RELEASE_KEY_PASSWORD=your_key_password

Adding new custom jars to the project's Maven repository

The maven repository for this project is hosted at github: https://raw.github.com/mvestola/helsinki-testbed2-android-repo/master/repo (yes, it returns 404 if you go to the url with your browser, but that does not matter)

The repo was made by following the instructions below: http://blog.marrowboy.co.uk/2011/11/08/how-to-host-a-maven-repo-on-github/

You can add more jars to the repo by cloning the repo and executing mvn deploy:deploy-file (http://maven.apache.org/guides/mini/guide-3rd-party-jars-remote.html). For example (all in one line):

mvn deploy:deploy-file \
-DgroupId=com.jhlabs \
-DartifactId=javaproj-noawt \
-Dversion=1.0.6 \
-Dpackaging=jar \
-Dfile=/path/in/your/computer/javaproj-1.0.6-noawt.jar \
-DrepositoryId=testbed2repo \
-Durl=file:///path/in/your/computer/to/the/clonedrepo/helsinki-testbed2-android-repo/repo

Testing guidelines

Test at least these special cases:

  • Downloading images while changing screen orientation (Ctrl+F11). Should not pause download.
  • Slow network connection
  • Emulator with oldest supported API version and small screen
  • Only one map image selected.
  • No network connection (disable network from computer running emulator). Should show error dialog.
  • Parsing error (change HTML_TIMESTAMP_PREFIX to some invalid value). Should show error dialog.
  • Cancelling download in ParsingActivity and AnimationActivity. Should show toast.
  • Continuing download when download cancelled. Should not download all images again.
  • Try to kill app with DDMS when it is in the background. Should not fail when resuming.
  • Use very fast animation (0.1 sec).
  • Play/pause button icon when application goes to background, returning from preferences and using the slider.
  • Both English and Finnish languages (change language from the Emulator's "Custom locale")
  • Default settings (remove the app and reset all saved settings)
  • Try out with large screen device such as tablet

Checklist for publishing a new release

  1. Change the version code and version name from build.gradle
  2. Update CHANGELOG.md
  3. Update whats_new_text from res/values/strings.xml (both English and Finnish)
  4. Create a signed package by running Build...Build Bundles / APKs...Build bundles from the Android studio using the build variant release (bottom left corner in Android Studio)
  5. Tag the code: git tag -a 2.0.x -m 'Tagged 2.0.x'; git push --tags
  6. Upload the file build/outputs/apk/testbed-release.aab to Google Play and activate it
  7. Update "Recent Changes" in Google Play (both English and Finnish)

Future refactoring plans

  • Get rid of RoboGuice and use Dagger Hilt