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Journal for KPI teachers

Prerequisites

  • sbt 0.13.0 or above
  • Android SDK
    • Both SDK Level 18 and the most recent version should be installed.

Build

You can build this project using sbt:

$ sbt android:package

This will compile the project and generate an APK.

If this fails try to remove ~/.sbt and ~/.ivy2 directories

$ rm -rf ~/.sbt
$ rm -rf ~/.ivy2

You'll also possibly need to setup ANDROID_HOME environment variable as a path to your android sdk directory

For more command, refer to android-sdk-plugin for sbt.

Tips for faster development iteration

In sbt, ~ is a prefix that repeatedly runs the command when the source code is modified.

~ android:run

This sbt command schedules to execute compile-package-deploy-run process after you save the edited source code. Compiling and packaging runs incrementally, so this iteration takes about only few seconds.

If you use default AVD, try genymotion or other faster virtual device. Deploying apk to the device becomes much faster!

Two more steps are (probably) needed for IDEA:

  • Project Structure -> Project -> in Project SDK section, select proper Android SDK
  • Project Structure -> Modules -> add Android facet to your project module

We do not recommend to use IDEA's own Android build system, because proguard settings are complicated and not fast. Use commands from android-sdk-plugin for sbt. It runs simple and fast.

Troubleshooting

Build error Android SDK build-tools not available

The most likely cause of this error is that your SDK build-tools are old. Update the Android SDK and retry.

Further Reading