| /* |
| * Copyright 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.car.media.common; |
| |
| import android.graphics.Rect; |
| import android.view.View; |
| |
| import androidx.recyclerview.widget.GridLayoutManager; |
| import androidx.recyclerview.widget.RecyclerView; |
| |
| /** |
| * An {@link RecyclerView.ItemDecoration} that adds spacing between cells in a |
| * {@link GridLayoutManager}. |
| */ |
| public class GridSpacingItemDecoration extends RecyclerView.ItemDecoration { |
| private final int mSpacing; |
| |
| /** |
| * Creates a {@link GridSpacingItemDecoration}. |
| * |
| * @param spacing space to add between grid cells horizontally. |
| */ |
| public GridSpacingItemDecoration(int spacing) { |
| this.mSpacing = spacing; |
| } |
| |
| @Override |
| public void getItemOffsets(Rect outRect, View view, RecyclerView parent, |
| RecyclerView.State state) { |
| GridLayoutManager.LayoutParams lp = (GridLayoutManager.LayoutParams) view.getLayoutParams(); |
| GridLayoutManager layoutManager = (GridLayoutManager) parent.getLayoutManager(); |
| int column = lp.getSpanIndex(); |
| int spanCount = layoutManager.getSpanCount(); |
| outRect.left = column * mSpacing / spanCount; |
| outRect.right = mSpacing - (column + 1) * mSpacing / spanCount; |
| } |
| } |