Fix checked status

app/src/main/java/com/hippo/easyrecyclerview/EasyRecyclerView.java

@@ -119,7 +119,7 @@ public class EasyRecyclerView extends ScrollLessRecyclerView {
      */
     private LongSparseArray<Integer> mCheckedIdStates;
 
-    private Adapter mAdapter;
+    private Adapter<?> mAdapter;
 
     public EasyRecyclerView(Context context) {
         super(context);
@@ -161,6 +161,18 @@ public class EasyRecyclerView extends ScrollLessRecyclerView {
         }
     }
 
+    @Override
+    public void onChildAttachedToWindow(@NonNull View child) {
+        super.onChildAttachedToWindow(child);
+
+        if (mCheckStates != null) {
+            int position = getChildAdapterPosition(child);
+            if (position >= 0) {
+                setViewChecked(child, mCheckStates.get(position));
+            }
+        }
+    }
+
     /**
      * Returns the number of items currently selected. This will only be valid
      * if the choice mode is not {@link #CHOICE_MODE_NONE} (default).