Google Fit api BLE connect issue

Question

I want to connect Mi Band 3 with my application through Google Fit SDK. I am facing issue to connect band through bluetooh. as given in Offical Google Fit Documentation - BLE Sensor I am using following code in Kotlin

 var bleScanCallbacks: BleScanCallback = object : BleScanCallback() {
        override fun onDeviceFound(device: BleDevice?) {
            // A device that provides the requested data types is available
        }

        override fun onScanStopped() {
            // The scan timed out or was interrupted
        }
    }

    var response: Task<Void> = Fitness.getBleClient(
        this,
        GoogleSignIn.getLastSignedInAccount(this)!!
    )
        .startBleScan(
            Arrays.asList(DataType.TYPE_STEP_COUNT_DELTA),
            1000, bleScanCallbacks
        )

but it showing that

'getBleClient(Activity, GoogleSignInAccount): BleClient!' is deprecated. Deprecated in Java

and

'BleScanCallback' is deprecated. Deprecated in Java

It suggesting to use BluetoothManager. I am beginner in android development. Java solution will also work.

Answer 1

After the BLE scanner has found your device, you can connect to its GATT server.

To connect to a GATT server on a BLE device, you use the connectGatt() method. This method takes three parameters: a Context object, autoConnect (boolean indicating whether to automatically connect to the BLE device as soon as it becomes available), and a reference to a BluetoothGattCallback:

BluetoothGatt bluetoothGatt = device.connectGatt(this, false, gattCallback);

This connects to the GATT server hosted by the BLE device, and returns a BluetoothGatt instance, which you can then use to conduct GATT client operations such as discovering services, reading and writing on BLE characteristics.

For a BluetoothGattCallback sample code and other infos: https://developer.android.com/guide/topics/connectivity/bluetooth-le