Android has two drives - main storage for apps and external storage for downloads and user files.
sdcard-path-or-size controls the second - external storage.

The Problem

Older devices default to 800M main storage. After the system apps, there is 309M left.
Most today's apps take more than that. Debug versions are not minimized, instrumented tests take extra space. Long story short - my app cannot fit. I get INSTALL_FAILED_INSUFFICIENT_STORAGE and related errors. Issue #184 is caused by this.

The PR

There is no option in avdcreate, but /Users/runner/.android/avd/${avdName}.avd/config.ini has the config option we want: disk.dataPartition.size=800M

This PR would allow appending a new disk.dataPartition.size size, when supplied as action argument named disk-size.

The Workaround

Until this or similar PR is merged, I have a workaround:

- name: Create AVD
  uses: reactivecircus/android-emulator-runner@v2
  with:
    api-level: 21
    arch: x86_64
    target: google_apis
    script: echo "Generated AVD snapshot."

- name: increate storage size for emulator
  run: echo "disk.dataPartition.size=2G" >> /Users/runner/.android/avd/test.avd/config.ini

- name: Run tests
  uses: reactivecircus/android-emulator-runner@v2
  with:
    api-level: 21
    arch: x86_64
    target: google_apis
    force-avd-creation: false
    script: ./gradlew connectedCheck