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On Wednesday, August 17, 2016 at 11:36:57 AM UTC-3, Gustavo Monteiro wrote:
>
> Hello,
>
> I'm working on a project in android that uses Bluetooth low energy (BLE).
> I have a DeviceScanFragment that shows a list of all BLE devices. When I
> select a device to connect, it should go to another fragment (
> ScanProfessionalFingerprintFragment ), start the BluetoothLeService and
> connect.
>
> The problem is that sometimes it doesn't connect. The BluetoothGattCallback
> on the BluetoothLeService receives status 133.
>
> private final BluetoothGattCallback mGattCallback = new
> BluetoothGattCallback() {
> @Override
> public void onConnectionStateChange(BluetoothGatt gatt, int status, int
> newState) {
> String intentAction;
>
> if (newState == BluetoothProfile.STATE_CONNECTED) {
> intentAction = ACTION_GATT_CONNECTED;
> mConnectionState = STATE_CONNECTED;
> broadcastUpdate(intentAction);
> Log.i(TAG, "Connected to GATT server.");
> // Attempts to discover services after successful connection.
> Log.i(TAG, "Attempting to start service discovery:" +
> mBluetoothGatt.discoverServices());
>
> } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
> intentAction = ACTION_GATT_DISCONNECTED;
> mConnectionState = STATE_DISCONNECTED;
> Log.i(TAG, "Disconnected from GATT server.");
> broadcastUpdate(intentAction);
> }
> }
>
>
> After that I receive ACTION_GATT_DISCONNECTED in the BroadcastReceiver on
> the ScanProfessionalFingerprintFragment and it doesn't connects.
>
>
> private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver()
> {
> @Override
> public void onReceive(Context context, Intent intent) {
> final String action = intent.getAction();
> if (BluetoothLeService.ACTION_GATT_CONNECTED.equals(action)) {
> mConnected = true;
> updateConnectionState(R.string.connected, mConnected);
> getActivity().invalidateOptionsMenu();
> } else if
> (BluetoothLeService.ACTION_GATT_DISCONNECTED.equals(action)) {
> mConnected = false;
> updateConnectionState(R.string.disconnected, mConnected);
> getActivity().invalidateOptionsMenu();
>
> } else if
> (BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED.equals(action)) {
> // Show all the supported services and characteristics on the
> user interface.
>
> displayGattServices(mBluetoothLeService.getSupportedGattServices());
> if(mGattCharacteristics != null && mGattCharacteristics.get(0) !=
> null && mGattCharacteristics.get(0).get(0) != null) {
>
> mBluetoothLeService.writeCharacteristic(
> prepareCharacteristic(), Constants.REQUEST_CONNECTION_CODE_1);
> mBluetoothLeService.readCharacteristic(
> prepareCharacteristic());
>
> }
> } else if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) {
> displayData( intent.getBooleanExtra("receivedProfessional",
> false));
>
> }
> }
> };
>
>
> What could it be?
>
> Thanks,
>
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