diff options
| -rw-r--r-- | media/packages/BluetoothMidiService/src/com/android/bluetoothmidiservice/BluetoothMidiDevice.java | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/media/packages/BluetoothMidiService/src/com/android/bluetoothmidiservice/BluetoothMidiDevice.java b/media/packages/BluetoothMidiService/src/com/android/bluetoothmidiservice/BluetoothMidiDevice.java index e6d59e4fb141..444705cfc79f 100644 --- a/media/packages/BluetoothMidiService/src/com/android/bluetoothmidiservice/BluetoothMidiDevice.java +++ b/media/packages/BluetoothMidiService/src/com/android/bluetoothmidiservice/BluetoothMidiDevice.java @@ -147,14 +147,22 @@ public final class BluetoothMidiDevice { // switch to receiving notifications after initial characteristic read mBluetoothGatt.setCharacteristicNotification(characteristic, true); + // Use writeType that requests acknowledgement. + // This improves compatibility with various BLE-MIDI devices. + int originalWriteType = characteristic.getWriteType(); + characteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_DEFAULT); + BluetoothGattDescriptor descriptor = characteristic.getDescriptor( CLIENT_CHARACTERISTIC_CONFIG); if (descriptor != null) { descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE); - mBluetoothGatt.writeDescriptor(descriptor); + boolean result = mBluetoothGatt.writeDescriptor(descriptor); + Log.d(TAG, "writeDescriptor returned " + result); } else { Log.e(TAG, "No CLIENT_CHARACTERISTIC_CONFIG for device " + mBluetoothDevice); } + + characteristic.setWriteType(originalWriteType); } @Override |