修改androidbackview方法3

src/utils/phone.ts

@@ -59,11 +59,11 @@ class Phone {
             }
         } else if (this.isAndroid()) {
             try {
-                window.WebViewJavascriptBridge.callHandler(
+                window.WebViewJavascriptBridge&&window.WebViewJavascriptBridge.callHandler(
                     'backView'
                     , { 'param': '返回的方法' }
                     , function (responseData) {
-
+                            
                     }
                 );
             } catch (error) {