屏幕宽度为0 时候，会通知dart测。这个逻辑在页面切换时候会出现，需要去除，拦截掉。不然会导致dart测获取屏幕宽度错误。

android/src/main/java/com/idlefish/flutterboost/XFlutterView.java

@@ -758,7 +758,7 @@ public class XFlutterView extends FrameLayout {
               + "FlutterView was not attached to a FlutterEngine.");
       return;
     }
-    if(viewportMetrics.width==0&&viewportMetrics.height==0)return;
+    if(viewportMetrics.width==0|| viewportMetrics.height==0)return;
 
     viewportMetrics.devicePixelRatio = getResources().getDisplayMetrics().density;
     flutterEngine.getRenderer().setViewportMetrics(viewportMetrics);