styles.xml做如下修改:
<style name="AppBaseTheme" parent="android:Theme.Light"></style>
<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
<!-- 修改分割线样式-->
<item name="android:listDivider">@drawable/s</item>
</style>
@draweble/s代码如下:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<gradient
android:centerColor="#ff00ff00"
android:endColor="#ff0000ff"
android:startColor="#ffff0000"
android:type="linear" />
<size android:height="4dp"/>
</shape>
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.listDivider};
private Drawable mDivider;
public MyItemDecoration(Context context)
{
TypedArray array = context.obtainStyledAttributes(ATTRS);
// 获取分隔条
mDivider = 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 + mDivider.getIntrinsicHeight();
mDivider.setBounds(left,top,right,bottom);
mDivider.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 DividerLine 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 DividerLine() {
this(VERTICAL);
}
public DividerLine(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
DividerLine dividerLine = new DividerLine(DividerLine.VERTICAL);
dividerLine.setSize(1);
dividerLine.setColor(0xFFDDDDDD);
recyclerView.addItemDecoration(dividerLine);