package com.lcjian.library.recyclerview;
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/**
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* Created by weikou2015 on 2017/6/28.
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*/
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.Rect;
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import android.graphics.drawable.Drawable;
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import android.support.v7.widget.LinearLayoutManager;
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import android.support.v7.widget.RecyclerView;
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import android.view.View;
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/**
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* This class is from the v7 samples of the Android SDK. It's not by me!
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* <p/>
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* See the license above for details.
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*/
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public class DividerItemDecoration extends RecyclerView.ItemDecoration {
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/**
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* 水平方向
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*/
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public static final int HORIZONTAL = LinearLayoutManager.HORIZONTAL;
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/**
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* 垂直方向
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*/
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public static final int VERTICAL = LinearLayoutManager.VERTICAL;
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// 画笔
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private Paint paint;
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// 布局方向
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private int orientation;
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// 分割线颜色
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private int color;
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// 分割线尺寸
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private int size;
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public DividerItemDecoration() {
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this(VERTICAL);
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}
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public DividerItemDecoration(int orientation) {
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this.orientation = orientation;
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paint = new Paint();
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}
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@Override
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public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
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super.onDrawOver(c, parent, state);
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if (orientation == VERTICAL) {
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drawHorizontal(c, parent);
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} else {
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drawVertical(c, parent);
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}
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}
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/**
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* 设置分割线颜色
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*
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* @param color 颜色
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*/
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public void setColor(int color) {
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this.color = color;
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paint.setColor(color);
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}
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/**
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* 设置分割线尺寸
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*
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* @param size 尺寸
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*/
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public void setSize(int size) {
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this.size = size;
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}
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// 绘制垂直分割线
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protected void drawVertical(Canvas c, RecyclerView parent) {
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final int top = parent.getPaddingTop();
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final int bottom = parent.getHeight() - parent.getPaddingBottom();
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final int childCount = parent.getChildCount();
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for (int i = 0; i < childCount; i++) {
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final View child = parent.getChildAt(i);
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final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();
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final int left = child.getRight() + params.rightMargin;
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final int right = left + size;
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c.drawRect(left, top, right, bottom, paint);
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}
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}
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// 绘制水平分割线
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protected void drawHorizontal(Canvas c, RecyclerView parent) {
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final int left = parent.getPaddingLeft();
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final int right = parent.getWidth() - parent.getPaddingRight();
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final int childCount = parent.getChildCount();
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for (int i = 0; i < childCount; i++) {
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final View child = parent.getChildAt(i);
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final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child.getLayoutParams();
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final int top = child.getBottom() + params.bottomMargin;
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final int bottom = top + size;
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c.drawRect(left, top, right, bottom, paint);
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}
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}
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}
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