temp

Samples/UIWidgetsSamples_2019_4/Assets/Script/ImageTest.cs

 using Unity.UIWidgets.painting;
 using Unity.UIWidgets.ui;
 using Unity.UIWidgets.widgets;
+using UnityEngine;
+using Color = Unity.UIWidgets.ui.Color;
 using FontStyle = Unity.UIWidgets.ui.FontStyle;
 using Image = Unity.UIWidgets.widgets.Image;
 using TextStyle = Unity.UIWidgets.painting.TextStyle;
                                 decoration: new BoxDecoration(
                                     borderRadius: BorderRadius.all(Radius.circular(8))
                                 ),
-                                child: Image.file("test.gif", gaplessPlayback: true)
+                                // child: Image.file("test.gif", gaplessPlayback: true)
+                                child:Image.network( System.IO.Path.Combine(Application.streamingAssetsPath, "test.gif"), gaplessPlayback: true)
                             ),
                             new Container(
                                 width: 200,

engine/Build.bee.cs

                     var builtNP = np.SetupSpecificConfiguration(config, androidToolchain.DynamicLibraryFormat).DeployTo("build");
 
                     builtNP.DeployTo("../Samples/UIWidgetsSamples_2019_4/Assets/Plugins/Android");
+                    builtNP.DeployTo("/Users/siyao/Documents/GitHub/untitled folder/unityLibrary/src/main/jniLibs/armeabi-v7a");
+                    
                 }
                 np.ValidConfigurations = validConfigurations;
             }

engine/src/shell/gpu/gpu_surface_gl.cc

   {
     TRACE_EVENT0("uiwidgets", "SkCanvas::Flush");
     onscreen_surface_->getCanvas()->flush();
+
+    //submit this frame to gpu
+    auto flushInfo = GrFlushInfo();
+    flushInfo.fFlags = GrFlushFlags::kSyncCpu_GrFlushFlag;
+    onscreen_surface_->flush(SkSurface::BackendSurfaceAccess::kNoAccess, flushInfo);
   }
 
   if (!delegate_->GLContextPresent()) {