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SensorDataTransporterHandheld

This is a library that pairs with SensorDataTransporterWearable to achieve a connection between an Android Mobile Device with the SmartWatch Device

Important: This library is for the handheld app

How to use it

Initialize the helper

val sensorDataTransporter = SensorDataTransporterHandheld(applicationContext)

Then, Initialize smartwatch controllers

sensorDataTransporter.smartWatchInit()

Now you are ready to start/stop smartwatch sensors

boolean: true -> Starts the smartwatch sensor and start receiving.

boolean: false -> Stops the smartwatch sensor.

Accelerometer

sensorDataTransporter.startStopAccelerometer(boolean)

Gyroscope

sensorDataTransporter.startStopGyroscope(boolean)

Heartrate

sensorDataTransporter.startStopHeartRate(boolean)

Step count

It just triggers the smartwatch to send the current step count.

sensorDataTransporter.stepCountSmartWatch

To receive the sensor data use

For Accelerometer and Gyroscope

sensorDataTransporterHandheld.sensorListener =
            object : SensorDataTransporterHandheld.SensorListener {
                override fun onData(xyz: XYZ?, dataType: Int) {
                    if (dataType == SensorReceiver.DATA_TYPE_ACCELEROMETER) {
                        // Do something with the xyz object
                    } else {
                        // Do something with the xyz object
                    }
                }
            }

For the Heartrate

sensorDataTransporterHandheld.sensorListenerHeartRate = 
            object : SensorDataTransporterHandheld.SensorListenerHeartRate {
                override fun onData(heartRate: Double) {
                    // Do something with the hearRate value.                    
                }
            }

For the Step Count

 sensorDataTransporterHandheld.stepCounterDataListener = 
            object : SensorDataTransporterHandheld.StepCounterDataListener {
                override fun onData(steps: Int) {
                    // Do something with the steps value.
                }
            }

Also is available isWatchConnected method to check if the handheld is connected with the wearable

sensorDataTransporterHandheld.isWatchConnected(object :
            SensorDataTransporterHandheld.isOkCallbackWatch {
            override fun OK(displayName: String?) {
                // Do something with the displaName value
            }

            override fun notOK() {
               // Inform user that the device is not connected with the smartwatch
            }
        })

Important things

  • The handheld app and the smartwatch app must have the same package name and must be signed with the same keystore

  • You have to add this service inside <application> .. </application> tag

        <service
            android:name="com.damnluck.sensordatatransporterhandheld.smartwatch.SensorReceiver"
            android:enabled="true"
            android:exported="true" >
            <intent-filter>
                <action android:name="com.google.android.gms.wearable.DATA_CHANGED" />
                <action android:name="com.google.android.gms.wearable.MESSAGE_RECEIVED" />
                <data android:scheme="wear" android:host="*" android:pathPrefix="/dataAccelerometer" />
                <data android:scheme="wear" android:host="*" android:pathPrefix="/dataGyroscope" />
                <data android:scheme="wear" android:host="*" android:pathPrefix="/heartrateData" />
                <data android:scheme="wear" android:host="*" android:pathPrefix="/stepCount" />
            </intent-filter>
        </service>
  • You have to add permissions in manifest
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
    <uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.BODY_SENSORS"/>
    <uses-permission android:name="android.permission.ACTIVITY_RECOGNITION"/>
  • Also, you have add important dependencies in your gradle file
    implementation 'com.google.android.gms:play-services-fitness:18.0.0'
    implementation 'com.google.android.gms:play-services-auth:17.0.0'
    implementation 'com.google.android.gms:play-services-wearable:15.0.0'
    implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.0.0'
    implementation 'com.google.code.gson:gson:2.8.6'

The end

Now the app is ready to receive messages from the handheld to start sending sensor data.