| /* |
| * Copyright (C) 2014 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.example.android.supportv7.widget.decorator; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Canvas; |
| import android.graphics.Rect; |
| import android.graphics.drawable.Drawable; |
| import android.support.v4.view.ViewCompat; |
| import android.support.v7.widget.LinearLayoutManager; |
| import android.support.v7.widget.RecyclerView; |
| import android.view.View; |
| |
| public class DividerItemDecoration extends RecyclerView.ItemDecoration { |
| |
| private static final int[] ATTRS = new int[]{ |
| android.R.attr.listDivider |
| }; |
| |
| public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL; |
| |
| public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL; |
| |
| private Drawable mDivider; |
| |
| private int mOrientation; |
| |
| public DividerItemDecoration(Context context, int orientation) { |
| final TypedArray a = context.obtainStyledAttributes(ATTRS); |
| mDivider = a.getDrawable(0); |
| a.recycle(); |
| setOrientation(orientation); |
| } |
| |
| public void setOrientation(int orientation) { |
| if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) { |
| throw new IllegalArgumentException("invalid orientation"); |
| } |
| mOrientation = orientation; |
| } |
| |
| @Override |
| public void onDraw(Canvas c, RecyclerView parent) { |
| if (mOrientation == VERTICAL_LIST) { |
| drawVertical(c, parent); |
| } else { |
| drawHorizontal(c, parent); |
| } |
| } |
| |
| public void drawVertical(Canvas c, RecyclerView parent) { |
| final int left = parent.getPaddingLeft(); |
| final int right = parent.getWidth() - parent.getPaddingRight(); |
| |
| final int childCount = parent.getChildCount(); |
| for (int i = 0; i < childCount; i++) { |
| final View child = parent.getChildAt(i); |
| final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child |
| .getLayoutParams(); |
| final int top = child.getBottom() + params.bottomMargin + |
| Math.round(ViewCompat.getTranslationY(child)); |
| final int bottom = top + mDivider.getIntrinsicHeight(); |
| mDivider.setBounds(left, top, right, bottom); |
| mDivider.draw(c); |
| } |
| } |
| |
| public void drawHorizontal(Canvas c, RecyclerView parent) { |
| final int top = parent.getPaddingTop(); |
| final int bottom = parent.getHeight() - parent.getPaddingBottom(); |
| |
| final int childCount = parent.getChildCount(); |
| for (int i = 0; i < childCount; i++) { |
| final View child = parent.getChildAt(i); |
| final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child |
| .getLayoutParams(); |
| final int left = child.getRight() + params.rightMargin + |
| Math.round(ViewCompat.getTranslationX(child)); |
| final int right = left + mDivider.getIntrinsicHeight(); |
| mDivider.setBounds(left, top, right, bottom); |
| mDivider.draw(c); |
| } |
| } |
| |
| @Override |
| public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) { |
| if (mOrientation == VERTICAL_LIST) { |
| outRect.set(0, 0, 0, mDivider.getIntrinsicHeight()); |
| } else { |
| outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0); |
| } |
| } |
| } |