Peripheral.java 文件源码

public void read(UUID serviceUUID, UUID characteristicUUID, Callback callback) {

        if (gatt == null) {
            callback.invoke("BluetoothGatt is null", null);
            return;
        }

        BluetoothGattService service = gatt.getService(serviceUUID);
        BluetoothGattCharacteristic characteristic = findReadableCharacteristic(service, characteristicUUID);

        if (characteristic == null) {
            callback.invoke("Characteristic " + characteristicUUID + " not found.", null);
        } else {
            readCallback = callback;
            if (!gatt.readCharacteristic(characteristic)) {
                readCallback = null;
                callback.invoke("Read failed", null);
            }
        }
    }