[마이][New] 북마크 카테고리 스크롤 기준 위치를 아이템의 상단 0번 위치로 수정

app/src/main/java/kr/co/zumo/app/lifeplus/view/screen/main/MainCategorySnapper.java

@@ -272,6 +272,7 @@ public class MainCategorySnapper extends RecyclerView.OnFlingListener {
     return new LinearSmoothScroller(mRecyclerView.getContext()) {
       @Override
       protected void onTargetFound(View targetView, RecyclerView.State state, Action action) {
+//        Log.e("APP#  MainCategorySnapper | onTargetFound", "|" + "targetView: " + targetView);
         if (mRecyclerView == null) {
           // The associated RecyclerView has been removed so there is no action to take.
           return;
@@ -318,7 +319,7 @@ public class MainCategorySnapper extends RecyclerView.OnFlingListener {
 
         final int time = calculateTimeForDeceleration(Math.max(Math.abs(dx), Math.abs(dy)));
         if (time > 0) {
-          int newTime = Math.min(TIME_MAX, Math.max(time, TIME_MIN));
+          int newTime = Math.max(time, TIME_MIN); //Math.min(TIME_MAX, Math.max(time, TIME_MIN));
           action.update(dx, dy, newTime, mDecelerateInterpolator);
         }
       }
@@ -512,8 +513,7 @@ public class MainCategorySnapper extends RecyclerView.OnFlingListener {
    * @return the target adapter position to you want to snap or {@link RecyclerView#NO_POSITION}
    * if no snapping should happen
    */
-  public int findTargetSnapPosition(LayoutManager layoutManager, int velocityX,
-                                    int velocityY) {
+  public int findTargetSnapPosition(LayoutManager layoutManager, int velocityX, int velocityY) {
     if (!(layoutManager instanceof ScrollVectorProvider)) {
       return RecyclerView.NO_POSITION;
     }

app/src/main/java/kr/co/zumo/app/lifeplus/view/screen/my/bookmark/BookMarkListFragment.java

@@ -9,6 +9,7 @@ import android.support.annotation.Nullable;
 import android.support.constraint.ConstraintLayout;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.LinearSmoothScroller;
+import android.support.v7.widget.OrientationHelper;
 import android.support.v7.widget.RecyclerView;
 import android.util.DisplayMetrics;
 import android.util.Log;
@@ -40,10 +41,12 @@ import kr.co.zumo.app.lifeplus.view.screen.FragmentBase;
  */
 public class BookMarkListFragment extends FragmentBase<BookMarkListPresenter> implements IBookMarkListView {
 
-  private RecyclerView recyclerViewBookMarkList;
+  private RecyclerView recyclerView;
   private BookMarkListAdapter bookMarkListAdapter;
   private CustomSpinner customSpinnerBookmark;
   private ConstraintLayout layoutCategory;
+  private LinearLayoutManager layoutManager;
+
   boolean isFirst = true;
 
   @Override
@@ -53,8 +56,8 @@ public class BookMarkListFragment extends FragmentBase<BookMarkListPresenter> im
 
   @Override
   protected void onAfterActivityCreated(Bundle savedInstanceState) {
-    recyclerViewBookMarkList = findViewById(R.id.recycler_view_book_mark_list);
-    recyclerViewBookMarkList.addItemDecoration(new RecyclerView.ItemDecoration() {
+    recyclerView = findViewById(R.id.recycler_view_book_mark_list);
+    recyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {
       // TODO: 클래스 분리 필요함
       @Override
       public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
@@ -127,7 +130,7 @@ public class BookMarkListFragment extends FragmentBase<BookMarkListPresenter> im
       presenter.onEvent(event);
     });
 
-    recyclerViewBookMarkList.setLayoutManager(new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false) {
+    layoutManager = new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false) {
       @Override
       public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
 
@@ -142,13 +145,30 @@ public class BookMarkListFragment extends FragmentBase<BookMarkListPresenter> im
           protected float calculateSpeedPerPixel(DisplayMetrics displayMetrics) {
             return 50f / displayMetrics.densityDpi;
           }
+
+          @Override
+          protected void onTargetFound(View targetView, RecyclerView.State state, RecyclerView.SmoothScroller.Action action) {
+            OrientationHelper helper = OrientationHelper.createVerticalHelper(layoutManager);
+            final int dy = helper.getDecoratedStart(targetView);
+            // fixme 0 위치가 미묘하게 다르게 처리된다.
+            //final int dy = layoutManager.getDecoratedTop(targetView);
+
+            Log.w("APP# BookMarkListFragment | onTargetFound", "|" + "dy: " + dy);
+            final int time = calculateTimeForDeceleration(dy);
+            if (time > 0) {
+              int newTime = Math.max(time, 240);
+              action.update(0, dy, newTime, mDecelerateInterpolator);
+            }
+          }
         };
 
         linearSmoothScroller.setTargetPosition(position);
         startSmoothScroll(linearSmoothScroller);
       }
-    });
-    recyclerViewBookMarkList.setAdapter(bookMarkListAdapter);
+    };
+    recyclerView.setLayoutManager(layoutManager);
+    recyclerView.setAdapter(bookMarkListAdapter);
+
   }
 
   @Override
@@ -202,11 +222,6 @@ public class BookMarkListFragment extends FragmentBase<BookMarkListPresenter> im
     }
   }
 
-  @Override
-  public void scrollToAnchor(int itemIndex) {
-    recyclerViewBookMarkList.smoothScrollToPosition(itemIndex);
-  }
-
   @Override
   public void setCategoryFocus(int categoryIndex) {
     int len = 5;
@@ -224,5 +239,8 @@ public class BookMarkListFragment extends FragmentBase<BookMarkListPresenter> im
     }
   }
 
-
+  @Override
+  public void scrollToAnchor(int itemIndex) {
+    recyclerView.smoothScrollToPosition(itemIndex);
+  }
 }