ManagerがON/OFF時にプラグインが強制終了する問題の修正。

Author: TakayukiHoshi1984

dConnectDevicePlugin/dConnectDeviceHeartRate/app/src/main/java/org/deviceconnect/android/deviceplugin/heartrate/HeartRateDeviceService.java

@@ -146,7 +146,9 @@ public void onCreate() {
     public void onDestroy() {
         super.onDestroy();
         unregisterBluetoothFilter();
-        getServiceProvider().removeServiceListener(this);
+        if (getPluginContext() != null) {
+            getServiceProvider().removeServiceListener(this);
+        }
         mHeartRateManager.removeOnHeartRateDiscoveryListener(mOnDiscoveryListener);
         mHeartRateManager.stop();
         mLogger.fine("HeartRateDeviceService end.");

dConnectDevicePlugin/dConnectDeviceSphero/app/src/main/java/org/deviceconnect/android/deviceplugin/sphero/SpheroDeviceService.java

@@ -294,7 +294,9 @@ public void onDestroy() {
         super.onDestroy();
         unregisterBluetoothFilter();
         unregisterDConnectServiceFilter();
-        getServiceProvider().removeServiceListener(this);
+        if (getPluginContext() != null) {
+            getServiceProvider().removeServiceListener(this);
+        }
         SpheroManager.INSTANCE.shutdown();
     }