fix

mobile/src/main/java/cn/garymb/ygomobile/ui/home/MainActivity.java

@@ -109,9 +109,7 @@ public class MainActivity extends HomeActivity{
     protected void onDestroy() {
         YGOStarter.onDestroy(this);
         super.onDestroy();
-        if(mResCheckTask != null) {
-            mResCheckTask.unregisterMReceiver();
-        }
+        mResCheckTask.unregisterMReceiver();
 
     }
 
@@ -141,11 +139,11 @@ public class MainActivity extends HomeActivity{
 
     @Override
     protected void checkResourceDownload(ResCheckListener listener) {
-        ResCheckTask task = new ResCheckTask(this, listener);
+        mResCheckTask = new ResCheckTask(this, listener);
         if (Build.VERSION.SDK_INT >= 11) {
-            task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+            mResCheckTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
         } else {
-            task.execute();
+            mResCheckTask.execute();
         }
     }