增加对升级对象为空的判断，用来取消升级功能。

Author: shihoo.wang

README.md

@@ -174,6 +174,7 @@ void bleCoreModule(byte data);
 * V2.2.0更新说明 2019/06/28 提供reInit方法，解决蓝牙服务在Application中绑定失败
 * V2.2.2更新说明 2019/07/13 适配android8.0相关操作
 * V2.2.5更新说明 2019/08/02 优化BleService后台运行 优化部分功能
+* V2.3.0更新说明 2019/08/02 增加对升级对象为空的判断，用来取消升级功能。
 
 
 ### 6、效果图

mylibrary/src/main/java/cc/bodyplus/sdk/ble/manger/BleConnectionManger.java

@@ -577,9 +577,8 @@ private void msgPowerLevel(byte[] data) {
      * @param device 设备详情
      */
     private void msgReConnectDevice(DeviceInfo device) {
-        boolean needUpgrade = checkDeviceVersion(device);
-        if (needUpgrade) {
-             // TODO 留个彩蛋
+        if (null!=mBPDfuListener && checkDeviceVersion(device)) {
+            // TODO 留个彩蛋
             msgReConnectDevicesDfu();
         }else {
             for (Object o : connectionMap.entrySet()) {
@@ -648,7 +647,9 @@ private void msgBleState(int arg1){
                 connectionInterface.reBleStateOn();
             }
         }else if (arg1 == 2){ // 蓝牙关闭
-            mBPDfuListener.onBleOff();
+            if (null != mBPDfuListener) {
+                mBPDfuListener.onBleOff();
+            }
         }
     }
 
@@ -689,15 +690,19 @@ private boolean checkDeviceVersion(DeviceInfo device){
     }
 
     private void startAssetsDfu(int type, String assetsName, DeviceInfo device) {
-        dfuHelperS02 = new DfuHelperS02(application,type,mBPDfuListener);
-        int status = dfuHelperS02.setAssetsZipFile(assetsName, device);
-        mBPDfuListener.onStart(status,device);
+        if (null != mBPDfuListener) {
+            dfuHelperS02 = new DfuHelperS02(application, type, mBPDfuListener);
+            int status = dfuHelperS02.setAssetsZipFile(assetsName, device);
+            mBPDfuListener.onStart(status, device);
+        }
     }
 
     private void startSdCardDfu(int type, String filePath, DeviceInfo device) {
-        dfuHelperS02 = new DfuHelperS02(application,type,mBPDfuListener);
-        int status = dfuHelperS02.setSdCardZipFile(filePath, device);
-        mBPDfuListener.onStart(status,device);
+        if (null != mBPDfuListener) {
+            dfuHelperS02 = new DfuHelperS02(application, type, mBPDfuListener);
+            int status = dfuHelperS02.setSdCardZipFile(filePath, device);
+            mBPDfuListener.onStart(status, device);
+        }
     }
 
     private void msgProcessDfuState(String sn){