Cisco Spark Goggles App
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👓 Spark Goggles CircleCI

☝️ How to Setup

Step 1: Run git clone

Step 2: Run cd spark-goggles.

Step 3: Install the dependencies by running yarn install.

Step 4: Run yarn start to start the React Native packager.

You can see the debugger interface at http://localhost:8081/debugger-ui/.

🚀 How to run the App

First, you'll need to install the Android SDK. Next, you can either run the app on a device or on an emulator.


  1. Run yarn android:emulator:create to create an Android virtual device.
  2. Run yarn android:emulator to start the emulator in a tab.
  3. Open another tab, run yarn android to launch the app.


  1. On the device, go into Settings > About.
  2. Find the build number. Tap it a bunch of times until it says "You've unlocked developer mode".
  3. Go back to the main settings menu.
  4. Find the developer settings section and find "USB Debugging". Make sure it's set to on.
  5. Run yarn android to launch the app.


  • If your device isn't cooperating, run yarn android:devices to see the list of connected devices. When correctly configured, the second column should say device.
  • To access some of the development settings, you can shake an android device. If you're using the emulator, you can run yarn android:shake.

🚫 Linting

To run the linter, run yarn lint. You can fix some of the errors automatically with yarn lint:fix. The linter will run automatically when you commit.

If you have to bypass lint for a special commit that you will come back and clean (pushing something to a branch etc.) then you can bypass git hooks with adding --no-verify to your commit command.


You can run the tests with yarn test.

🔐 Secrets

This project uses react-native-config to expose config variables to your javascript code in React Native. You can store API keys and other sensitive information in a .env file:


and access them from React Native like so:

import Secrets from 'react-native-config'

Secrets.API_URL  // ''
Secrets.GOOGLE_MAPS_API_KEY  // 'abcdefgh'

The .env file is ignored by git keeping those secrets out of your repo.

📦 Adding a Native package

If you add a package that contains Java or ObjC code, you'll need to link it. To do so, you'll simply run yarn react-native link.

After linking, you'll want to re-build the app entirely: yarn android.

:shipit: Generating a release

First, you'll need a .keystore file. To generate this file, you can run yarn keytool. Answer each question, and don't forget the passwords you've chosen!

After running this script, you should find a file called android/app/spark-goggles.keystore. If you plan to release the app to Google Play, you'll want to make sure that you don't lose this file.

Next, you'll need to configure a few build variables. You'll need to drop the following configuration in ~/.gradle/


Finally, to build an .apk file, you can run yarn android:build. This will generate android/app/build/outputs/apk/app-release.apk.

For more information, consult the React Native documentation.

NOTE: It is imperative that you don't commit the .keystore file or any passwords.