remove redundance valiable in main

app/src/main/java/com/sheep/gamegroup/view/activity/ActMain.java

@@ -153,8 +153,6 @@ public class ActMain extends BaseActYmPermissionCheck {
 
     }
 
-    private List<Fragment> fragmentList = new ArrayList<>();
-
     private int lastPosition = MainTab.FgtSmallSheep.ordinal();//默认选中小绵羊
 
     //多次点击预防
@@ -170,7 +168,6 @@ public class ActMain extends BaseActYmPermissionCheck {
             if (fragment == null) {
                 fragment = mainTabs[index].getFragment();
             }
-            fragmentList.add(fragment);
             if (!fragment.isAdded()) {
                 transaction.add(R.id.frame_container, fragment, "fragment_" + index);
             }
@@ -248,9 +245,7 @@ public class ActMain extends BaseActYmPermissionCheck {
      */
     private void doBackPress() {
         if (System.currentTimeMillis() - mLastBackTime < 1000) {
-            fragmentList.clear();
-            fragmentList = null;
-            fragmentList = getSupportFragmentManager().getFragments();
+            List<Fragment> fragmentList = getSupportFragmentManager().getFragments();
             FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
             for (Fragment fragment : fragmentList) {
                 try {