diff --git a/communication/src/main/java/cn/rrg/com/AbsBluetoothSpp.java b/communication/src/main/java/cn/rrg/com/AbsBluetoothSpp.java
index d62385db..915a1aa1 100644
--- a/communication/src/main/java/cn/rrg/com/AbsBluetoothSpp.java
+++ b/communication/src/main/java/cn/rrg/com/AbsBluetoothSpp.java
@@ -64,7 +64,8 @@ public abstract class AbsBluetoothSpp implements DriverInterface<BluetoothDevice
                             //避免重复添加已经绑定过的设备
                             if (device != null) {
                                 if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
-                                    callback.onAttach(device);
+                                    if (callback != null)
+                                        callback.onAttach(device);
                                 }
                             }
                             break;
@@ -77,7 +78,8 @@ public abstract class AbsBluetoothSpp implements DriverInterface<BluetoothDevice
                         case BluetoothDevice.ACTION_ACL_DISCONNECTED:
                             //蓝牙断开连接广播
                             device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
-                            callback.onDetach(device);
+                            if (callback != null)
+                                callback.onDetach(device);
                             break;
                         case BluetoothAdapter.ACTION_STATE_CHANGED:
                             //蓝牙状态改变广播
diff --git a/communication/src/main/java/cn/rrg/com/UsbSerialControl.java b/communication/src/main/java/cn/rrg/com/UsbSerialControl.java
index 680eb99e..d30035ae 100644
--- a/communication/src/main/java/cn/rrg/com/UsbSerialControl.java
+++ b/communication/src/main/java/cn/rrg/com/UsbSerialControl.java
@@ -67,7 +67,8 @@ public class UsbSerialControl implements DriverInterface<String, UsbManager> {
                         //get permission success
                         if (init1()) {
                             //初始化成功则回调串口设备加入方法
-                            mCallback.onAttach(NAME_DRIVER_USB_UART);
+                            if (mCallback != null)
+                                mCallback.onAttach(NAME_DRIVER_USB_UART);
                         } else {
                             //不成则打印到LOG
                             Log.e(LOG_TAG, "NAME_DRIVER_USB_UART: no usb permission!");
@@ -79,8 +80,8 @@ public class UsbSerialControl implements DriverInterface<String, UsbManager> {
                             action.equals(UsbManager.ACTION_USB_DEVICE_ATTACHED) ||
                             action.equals(ACTION_BROADCAST)) {
                         Log.d(LOG_TAG, "收到UsbSerial设备寻找的广播!");
-                        if (mCallback != null) {
-                            if (init1()) {
+                        if (init1()) {
+                            if (mCallback != null) {
                                 //初始化成功则回调串口设备加入方法
                                 mCallback.onAttach(NAME_DRIVER_USB_UART);
                             } else {