get Android debug signing key fingerprint
Here's how to retreive the SHA1 and SHA256 fingerprints for debug.keystore. That's what Android Studio / gradle is using to sign APKs for testing and debugging.
./gradlew signingReport
Alternatively, this is how to get the same fingerprints using javas keytool directly:
keytool -list -v \
-keystore ~/.android/debug.keystore \
-alias androiddebugkey \
-storepass android -keypass android
This assumes that the standard debug keystore config wasn't changed.