检查新版本改为mvvm实现

app/src/main/java/cn/yunliyunwai/beyondclouds/viewmodel/AppViewModel.java

@@ -42,7 +42,7 @@ public class AppViewModel extends ViewModel {
     public AppViewModel(Context context, IAppRepository appRepository) {
         this.mContext = context;
         this.appRepository = appRepository;
-        currentVersion = VersionUtils.getCurrentVersion(context);
+        currentVersion = VersionUtils.getCurrentVersion(mContext);
         hasNewVersion.setValue(false);
     }