I have an app with two modules, app and wearable.

I need to send data from handheld to wear, and from wear to handheld.

This is my code:

Wear MainActivity

class MainActivity : Activity(), DataClient.OnDataChangedListener {

private lateinit var binding: ActivityMainBinding
private val dataClient by lazy { Wearable.getDataClient(this) }

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    binding = ActivityMainBinding.inflate(layoutInflater)
    setContentView(binding.root)

}

override fun onResume() {
    super.onResume()
    dataClient.addListener(this)
    addClickListener()
}

override fun onPause() {
    super.onPause()
    dataClient.removeListener(this)
}

override fun onDataChanged(dataEvent: DataEventBuffer) {
    Toast.makeText(this, "Hello World!", Toast.LENGTH_LONG).show()
}

private fun addClickListener() {
    binding.buttonWear.setOnClickListener {
        sendDataItem(System.currentTimeMillis())
    }
}

private fun sendDataItem(item: Long) {
    try {
        val request = PutDataMapRequest.create("/wearable_path").apply {
            dataMap.putString("wearable_key", item.toString())
        }
            .asPutDataRequest()
            .setUrgent()

        dataClient.putDataItem(request).addOnSuccessListener {
            android.util.Log.d(":::","Success")
        }.addOnCanceledListener {
            android.util.Log.d(":::","Cancel")
        }.addOnFailureListener {
            android.util.Log.d(":::","Failure")
        }

    } catch (cancellationException: CancellationException) {
        cancellationException.printStackTrace()
    } catch (exception: Exception) {
        exception.printStackTrace()
    }
}

}

Handheld MainFragment.

class MainFragment: Fragment(), DataClient.OnDataChangedListener {

private val dataClient by lazy { Wearable.getDataClient(requireContext()) }
private val button by lazy { requireActivity().findViewById<Button>(R.id.button)}

override fun onCreateView(
    inflater: LayoutInflater,
    container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    return inflater.inflate(R.layout.fragment_main, container, false)
}

override fun onResume() {
    super.onResume()
    dataClient.addListener(this)
    addClickListener()
}

override fun onPause() {
    super.onPause()
    dataClient.removeListener(this)
}

override fun onDataChanged(p0: DataEventBuffer) {
    Toast.makeText(requireContext(), "Hello World!", Toast.LENGTH_LONG).show()

}

private fun addClickListener() {
    button?.setOnClickListener {
        sendDataItem(System.currentTimeMillis())
    }
}

private fun sendDataItem(item: Long) {
    try {
        val request = PutDataMapRequest.create("/wearable_path").apply {
            dataMap.putString("wearable_key", item.toString())
        }.asPutDataRequest().setUrgent()

        dataClient.putDataItem(request).addOnSuccessListener {
            android.util.Log.d(":::","Success")
        }.addOnCanceledListener {
            android.util.Log.d(":::","Cancel")
        }.addOnFailureListener {
            android.util.Log.d(":::","Failure")
        }
    } catch (cancellationException: CancellationException) {
        cancellationException.printStackTrace()
    } catch (exception: Exception) {
        exception.printStackTrace()
    }
}
}

The problem is, when I click the button in handheld, the data is received in both devices and show the toast, but when I click the button in the wearable device, onDataChanged in handlend (fragment) is not called, and the toast is shown in the wear but not in the handheld.

Any suggest?

CodePudding user response：

I found the solution. I was signing the app but not singning the wear module.

I must sign in the same way the app and the wear module.

Be careful with the applicationId, it must be the same too.

CodePudding user response：

I also had trouble for the android code, then waited for help but it didn't work, I had to pay for a professional.