解决Top页面在绑定engine 后，被底下页面detach engine ，导致白屏问题卡死问题

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

@@ -66,6 +66,14 @@ public class ContainerRecord implements IContainerRecord {
         return mState;
     }
 
+    @Override
+    public boolean isLock(){
+        IContainerRecord record=mManager.getCurrentTopRecord();
+        if(record==this ||record==null ) return  false;
+        return  true;
+
+    }
+
     @Override
     public void onCreate() {
         Utils.assertCallOnMainThread();
@@ -211,6 +219,7 @@ public class ContainerRecord implements IContainerRecord {
             }
         }
 
+
         private void appear() {
             invokeChannelUnsafe("didShowPageContainer",
                     mContainer.getContainerUrl(),

android/src/main/java/com/idlefish/flutterboost/containers/FlutterActivityAndFragmentDelegate.java

@@ -23,6 +23,7 @@ import com.idlefish.flutterboost.FlutterBoost;
 import com.idlefish.flutterboost.Utils;
 import com.idlefish.flutterboost.XFlutterView;
 import com.idlefish.flutterboost.XPlatformPlugin;
+import com.idlefish.flutterboost.interfaces.IContainerRecord;
 import com.idlefish.flutterboost.interfaces.IFlutterViewContainer;
 import com.idlefish.flutterboost.interfaces.IOperateSyncer;
 import io.flutter.Log;
@@ -164,6 +165,8 @@ public class FlutterActivityAndFragmentDelegate implements IFlutterViewContainer
 
 
     public void onResume() {
+        if(mSyncer.isLock()) return;
+
         mSyncer.onAppear();
 
         Log.v(TAG, "onResume()");
@@ -196,7 +199,7 @@ public class FlutterActivityAndFragmentDelegate implements IFlutterViewContainer
 
     public void onPause() {
         Log.v(TAG, "onPause()");
-
+        if(mSyncer.isLock()) return;
         ensureAlive();
         mSyncer.onDisappear();
         flutterEngine.getLifecycleChannel().appIsInactive();

android/src/main/java/com/idlefish/flutterboost/interfaces/IOperateSyncer.java

@@ -5,6 +5,7 @@ import android.content.Intent;
 import java.util.Map;
 
 public interface IOperateSyncer {
+    boolean isLock();
 
     void onCreate();
 
@@ -29,4 +30,5 @@ public interface IOperateSyncer {
     void onTrimMemory(int level);
 
     void onLowMemory();
+
 }