update android gl init

Samples/UIWidgetsSamples_2019_4/Assets/CountDemo.unity

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com.unity.uiwidgets/Runtime/engine2/UIWidgetsPanel.cs

 using System;
 using System.Collections;
 using System.Collections.Generic;
+using engine2;
 using Unity.UIWidgets.editor2;
 using Unity.UIWidgets.foundation;
 using Unity.UIWidgets.ui;
         
         static bool _ShowDebugLog = false;
 
+#if !UNITY_EDITOR && UNITY_ANDROID
+        static bool InitAnroidGLFlag = true;
+
+        IEnumerator InitAnroidGL() {
+            yield return new WaitForEndOfFrame();
+            AndroidGLInit.Init();
+            yield return new WaitForEndOfFrame();
+            enabled = true;
+        }
+#endif
+
+#if !UNITY_EDITOR && UNITY_ANDROID
+            if (InitAnroidGLFlag) {
+                InitAnroidGLFlag = false;
+                startCoroutine(InitAnroidGL());
+                enabled = false;
+                return;
+            }
+#endif
+            
             base.OnEnable();
             var settings = new Dictionary<string, object>();
             if (fonts != null && fonts.Length > 0) {

Samples/UIWidgetsSamples_2019_4/Assets/AndroidWorkAround.cs

-using engine2;
-using UIWidgetsSample;
-using Unity.UIWidgets.engine2;
-using UnityEngine;
-
-namespace Unity.UIWidgets.ui
-{
-    
-    public class AndroidWorkAround : MonoBehaviour
-    {
-        UIWidgetsPanel panel;
-
-        // Start is called before the first frame update
-        void Start()
-        {
-            panel = GetComponent<UIWidgetsPanel>();
-            panel.enabled = false;
-            AndroidGLInit.Init();
-        }
-
-        // Update is called once per frame
-        void Update()
-        {
-            if (!panel.enabled)
-            {
-                panel.enabled = true;
-                enabled = false;
-            }
-        }
-    }
-
-}