1.优化京东初始化SDK时报错的问题

android/src/main/java/com/jd/jdsdk/JdsdkPlugin.java

@@ -17,7 +17,7 @@ import io.flutter.plugin.common.PluginRegistry.Registrar;
 public class JdsdkPlugin implements FlutterPlugin, MethodCallHandler, ActivityAware {
     public static JDHelper mJDHelper;
     private MethodChannel channel;
-
+    private ActivityPluginBinding binding;
     @Override
     public void onAttachedToEngine(FlutterPluginBinding flutterPluginBinding) {
 //    mJDHelper = JDHelper.getInstance(flutterPluginBinding.getApplicationContext());
@@ -56,6 +56,7 @@ public class JdsdkPlugin implements FlutterPlugin, MethodCallHandler, ActivityAw
     @Override
     public void onAttachedToActivity(ActivityPluginBinding binding) {
         Log.d("flutter-taoke", "onAttachedToActivity" + binding);
+        this.binding=binding;
         mJDHelper = JDHelper.getInstance(binding);
     }