diff --git a/app/src/main/java/com/unionmed/unionmedtv/activity/HomeActivity.java b/app/src/main/java/com/unionmed/unionmedtv/activity/HomeActivity.java
index 809a2eb..d1de2a5 100644
--- a/app/src/main/java/com/unionmed/unionmedtv/activity/HomeActivity.java
+++ b/app/src/main/java/com/unionmed/unionmedtv/activity/HomeActivity.java
@@ -87,12 +87,14 @@ public class HomeActivity extends BaseActivity implements View.OnFocusChangeList
             }
         });
         mViewPager.setCurrentItem(0);
-        LiveDataBus.get().with(Constants.CITY_SELECT,String.class).observe(this, new Observer<String>() {
+        LiveDataBus.get().with(Constants.CITY_SELECT, String.class).observe(this, new Observer<String>() {
             @Override
             public void onChanged(String s) {
                 tv_city.setText(CacheUtil.getIpAddress() == null ? "选择城市" : CacheUtil.getIpAddress().getMemo());
-                MyDoctorFragment currentFragment = (MyDoctorFragment) fragments.get(mViewPager.getCurrentItem());
-                currentFragment.loadData();
+                if (fragments.get(mViewPager.getCurrentItem()) instanceof MyDoctorFragment) {
+                    MyDoctorFragment currentFragment = (MyDoctorFragment) fragments.get(mViewPager.getCurrentItem());
+                    currentFragment.loadData();
+                }
             }
         });
     }
@@ -142,7 +144,7 @@ public class HomeActivity extends BaseActivity implements View.OnFocusChangeList
         if (keyCode == KeyEvent.KEYCODE_BACK) {
             if (System.currentTimeMillis() - exitTime > 2000) {
                 ToastUtils.showLong("在按一次退出程序");
-                exitTime=System.currentTimeMillis();
+                exitTime = System.currentTimeMillis();
             } else {
                 finish();
                 System.exit(0);