styles.xml做如下修改:
@draweble/s代码如下:
MyItemDecoration代码如下:
package com.wuzhiqiang.learnswiperefreshlayout; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.drawable.Drawable; import android.support.v7.widget.RecyclerView; import android.view.View; /** * Created by mfpc on 2015/11/2. */ public class MyItemDecoration extends RecyclerView.ItemDecoration { private static final int[] ATTRS = {android.R.attr.listpider}; private Drawable mpider; public MyItemDecoration(Context context) { TypedArray array = context.obtainStyledAttributes(ATTRS); // 获取分隔条 mpider = array.getDrawable(0); array.recycle(); } @Override public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) { super.onDrawOver(c, parent, state); int count = parent.getChildCount(); int left = parent.getPaddingLeft(); int right = parent.getWidth()-parent.getPaddingRight(); for(int i = 0; i < count; i++) { View v = parent.getChildAt(i); RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) v.getLayoutParams(); int top = v.getBottom() + params.bottomMargin; int bottom = top + mpider.getIntrinsicHeight(); mpider.setBounds(left,top,right,bottom); mpider.draw(c); } } }
但是中间出错了:
@drawabel/s文件应该怎么写?或者使其他地方有问题?
应为 RecyclerView 和 LayoutManager 是分离的,所以没有分割线属性,可以用 RecyclerView.ItemDecoration 进行分割线的绘制。
提供一个简单的装饰
/** * 分隔线装饰 * * @author youmingdot */ public class piderLine extends RecyclerView.ItemDecoration { /** * 水平方向 */ public static final int HORIZONTAL = LinearLayoutManager.HORIZONTAL; /** * 垂直方向 */ public static final int VERTICAL = LinearLayoutManager.VERTICAL; // 画笔 private Paint paint; // 布局方向 private int orientation; // 分割线颜色 private int color; // 分割线尺寸 private int size; public piderLine() { this(VERTICAL); } public piderLine(int orientation) { this.orientation = orientation; paint = new Paint(); } @Override public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) { super.onDrawOver(c, parent, state); if (orientation == VERTICAL) { drawHorizontal(c, parent); } else { drawVertical(c, parent); } } /** * 设置分割线颜色 * * @param color 颜色 */ public void setColor(int color) { this.color = color; paint.setColor(color); } /** * 设置分割线尺寸 * * @param size 尺寸 */ public void setSize(int size) { this.size = size; } // 绘制垂直分割线 protected void drawVertical(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; final int right = left + size; c.drawRect(left, top, right, bottom, paint); } } // 绘制水平分割线 protected void drawHorizontal(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; final int bottom = top + size; c.drawRect(left, top, right, bottom, paint); } } }
使用方法
piderLine piderLine = new piderLine(piderLine.VERTICAL); piderLine.setSize(1); piderLine.setColor(0xFFDDDDDD); recyclerView.addItemDecoration(piderLine);