SmartPlay

An Android OS Wear Application to measure children's activity while playing.

Setting Workflows

To set up workflows, place the workflows.json file in the following path via the Device File Explorer:

/storage/emulated/0/Android/data/com.example.smartplay/files/workflows.json

You can find a demo workflows.json file in the app/sampledata folder of this repository.

Initial Setup (New Watch)

For a Samsung Galaxy Watch v6 and above:

1. Pair the Watch:
   • Pair the watch with an Android phone using the Samsung Wearable app.
2. Enable Developer Mode on the Watch:
   • Go to Settings -> About the watch -> Software information.
   • Tap the "Software information" tile multiple times until 'Developer mode turned on' message appears.
3. Connect the Watch to a Computer:
   • Connect the watch to your computer via cable or Wi-Fi. (See the steps below for Wi-Fi Debugging)

⌚️ Installing the Application on the Device

Ensure adb is installed on your computer and the watch is connected via USB or Wi-Fi.

adb -s <device_id> install -r /path/to/your/app-debug.apk

Note: Installation via Wi-Fi Debugging is recommended. Please refer to the Wi-Fi Debugging section below.

Recording Files

After a recording session, files will be generated and saved in the Documents directory. The filename format is [user_id]_[type]_[device_id]_[timestamp].

Filename Breakdown:

• user_id: Numeric identifier set on the settings screen.
• type: Type of data in the file:
  • SENSORS: Sensors data.
  • AUDIO: Audio recordings.
  • BT: Bluetooth scan data.
  • QUESTIONS: Responses to workflow questions.
• device_id: Unique identifier for the device (e.g., faaab8a5585c9531).
• timestamp: Time when the recording was made, ensuring a unique identifier.

Example: 1_AUDIO_faaab8a5585c9531_1717009923893.3gp represents an audio recording for user 1, captured by device faaab8a5585c9531 at the timestamp 1717009923893.

Privacy

Files are stored in the internal storage of the app's private directory. They are not directly accessible via the SD card or file explorer apps unless the device is rooted.

🛜 Connecting the Smartwatch via Wi-Fi Debugging

If installation via USB doesn't work, follow these steps for Wi-Fi Debugging:

1. On the watch, go to Settings -> Developer options.
2. Enable Developer options.
3. Enable ADB debugging.
4. Go to Wireless debugging and click + Pair new device.
   • Note the IP address & port displayed on the watch.
5. On your computer, run:

   adb pair <YOUR_IP_ADDRESS:PORT>
   

6. Once paired, connect by running:

   adb connect <YOUR_IP_ADDRESS:PORT>
   

Install APK via Wi-Fi

Once connected, download the SmartPlay application(.apk) and install it on the whatch usin gyour computer terminal:

adb -s ip:port install </path/to/your/app-debug.apk>

If having issues, restart the adb server:

adb kill-server
adb start-server

🛠️ Building the App with Android Studio

You can build the app using Android Studio by following the standard build process.

Useful Commands

Description	Command
Connect to a device	adb connect 192.168.1.64:5555
Install app	adb -s 192.168.1.148:5555 install ./app-debug.apk
Uninstall app	adb -s 192.168.1.148:5555 uninstall com.example.smartplay
List installed packages	adb -s 192.168.1.148:5555 shell pm list packages