Merge pull request #616 from HansKrywaa/fix-615

Fix Nullpointer Exception

Author: randdusing

src/android/BluetoothLePlugin.java

@@ -1006,16 +1006,16 @@ private void initializeAction(JSONArray args, CallbackContext callbackContext) {
     }
   }
 
-  
+
   /**
-  * Retrieves a minimal set of adapter details 
+  * Retrieves a minimal set of adapter details
   * (address, name, initialized state, enabled state, scanning state, discoverable state)
   */
-  private void getAdapterInfoAction(CallbackContext callbackContext) {    
-    JSONObject returnObj = new JSONObject();    
+  private void getAdapterInfoAction(CallbackContext callbackContext) {
+    JSONObject returnObj = new JSONObject();
 
     // Not yet initialized
-    if (bluetoothAdapter == null) {      
+    if (bluetoothAdapter == null) {
       Activity activity = cordova.getActivity();
       BluetoothManager bluetoothManager = (BluetoothManager) activity.getSystemService(Context.BLUETOOTH_SERVICE);
       BluetoothAdapter bluetoothAdapterTmp = bluetoothManager.getAdapter();
@@ -1030,7 +1030,7 @@ private void getAdapterInfoAction(CallbackContext callbackContext) {
       PluginResult pluginResult = new PluginResult(PluginResult.Status.OK, returnObj);
       pluginResult.setKeepCallback(true);
       callbackContext.sendPluginResult(pluginResult);
-      return;      
+      return;
     } else {
       // Already initialized, so use the bluetoothAdapter class property to get all the info
       addProperty(returnObj, keyAddress, bluetoothAdapter.getAddress());
@@ -1041,10 +1041,10 @@ private void getAdapterInfoAction(CallbackContext callbackContext) {
       addProperty(returnObj, keyIsDiscoverable, bluetoothAdapter.getScanMode() == BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE);
       PluginResult pluginResult = new PluginResult(PluginResult.Status.OK, returnObj);
       pluginResult.setKeepCallback(true);
-      callbackContext.sendPluginResult(pluginResult);      
+      callbackContext.sendPluginResult(pluginResult);
       return;
     }
-    
+
   }
 
   private void enableAction(CallbackContext callbackContext) {
@@ -1690,7 +1690,7 @@ private boolean refreshDeviceCache(BluetoothGatt gatt) {
         boolean bool = ((Boolean) localMethod.invoke(localBluetoothGatt, new Object[0])).booleanValue();
         return bool;
       }
-    } 
+    }
     catch (Exception localException) {
       Log.e("BLE", "An exception occured while refreshing device cache");
     }
@@ -2795,7 +2795,7 @@ public void onReceive(Context context, Intent intent) {
 
             break;
           case BluetoothAdapter.STATE_TURNING_OFF:
-            gattServer.close();
+            if(gattServer != null) gattServer.close();
             break;
           case BluetoothAdapter.STATE_ON: