Android BluetoothGatt writeCharacteristic with response

Question

From the documentations I see how to write without response like this:

BluetoothGattCharacteristic characteristic = ...
characteristic.setValue(bytes);
mBluetoothGatt.writeCharacteristic(characteristic);

How do you preform a write request operation WITH response?

(In iOS there is option to select write type CBCharacteristicWriteWithResponse and CBCharacteristicWriteWithoutResponse)

Answer 1

1. Your characteristic should be writable.

Checking whether the characteristic is writable:

(characteristic.getProperties() & (BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE))) != 0

2. BluetoothGatt.writeCharacteristic() returns boolean flag indicating whether writing succeeded (true if so).
3. Once the BluetoothGatt.writeCharacteristic succeeds BluetoothGattCallback.onCharacteristicWrite() callback is executed with the characteristic with the value that you specified.

Answer 2

From the documentation:

public void setWriteType (int writeType)

Added in API level 18 Set the write type for this characteristic

Setting the write type of a characteristic determines how the writeCharacteristic(BluetoothGattCharacteristic) function write this characteristic.

Parameters writeType The write type to for this characteristic. Can be one of: WRITE_TYPE_DEFAULT, WRITE_TYPE_NO_RESPONSE or WRITE_TYPE_SIGNED.