/*返回false禁用，返回true启用*/
  @Override
  public boolean panelEnabled() {
      return mCommandQueue.panelsEnabled(); //修改该方法的实现逻辑即可
  }

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java 
@@ -1348,7 +1349,11 @@ public class NavigationBarView extends FrameLayout implements
             if(!mStatusBar.isPresenterFullyCollapsed()) {
                 mStatusBarManager.collapsePanels();
             } else {
-                mStatusBarManager.expandNotificationsPanel();
+                               boolean panelEnable = Settings.Global.getInt(mContext.getContentResolver(), 
+                                                       Settings.Global.NOTIFICATION_PANEL_ENABLE, 1)==1?true:false;
+                               if(panelEnable){
+                       mStatusBarManager.expandNotificationsPanel();
+                               }
             }
         }
     }