去除RecyclerView底部（最后一条）分割线

做了一个横向滑动的RecyclerView 使用自定义分割线 宽度为10dp

因为左右都有padding值 最后一条如果有分割线太丑 也不符合需求 

解决 网上参考了一些方法 大多都是继承 ItemDecoration 重写其方法 然后在循环创建分割线的循环里减一

但是

我发现不管用 分割线还在那 似乎是因为宽度太宽引起的？

那就继续修改，在给分割线高度赋值的时候 判断如果是最后一条 把分割线的宽高都赋值为0 其他的正常赋值

我这里是横向滑动的RecyclerView 如果是纵向的 一样的方法

下面附上完整的代码

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.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.ItemDecoration;
import android.support.v7.widget.RecyclerView.State;
import android.util.Log;
import android.view.View;/*** Created by qzp on 2019/6/13. 去除recyclerView最后一条分割线*/public class MyItemDecoration extends ItemDecoration {public static final int HORIZONTAL = 0;public static final int VERTICAL = 1;private static final String TAG = "DividerItem";private static final int[] ATTRS = new int[]{16843284};private Drawable mDivider;private int mOrientation;private final Rect mBounds = new Rect();public MyItemDecoration(Context context, int orientation) {TypedArray a = context.obtainStyledAttributes(ATTRS);this.mDivider = a.getDrawable(0);if (this.mDivider == null) {Log.w("DividerItem", "@android:attr/listDivider was not set in the theme used for this DividerItemDecoration. Please set that attribute all call setDrawable()");}a.recycle();this.setOrientation(orientation);}public void setOrientation(int orientation) {if (orientation != 0 && orientation != 1) {throw new IllegalArgumentException("Invalid orientation. It should be either HORIZONTAL or VERTICAL");} else {this.mOrientation = orientation;}}public void setDrawable(@NonNull Drawable drawable) {if (drawable == null) {throw new IllegalArgumentException("Drawable cannot be null.");} else {this.mDivider = drawable;}}@Overridepublic void onDraw(Canvas c, RecyclerView parent, State state) {if (parent.getLayoutManager() != null && this.mDivider != null) {if (this.mOrientation == 1) {this.drawVertical(c, parent);} else {this.drawHorizontal(c, parent);}}}private void drawVertical(Canvas canvas, RecyclerView parent) {canvas.save();int left;int right;if (parent.getClipToPadding()) {left = parent.getPaddingLeft();right = parent.getWidth() - parent.getPaddingRight();canvas.clipRect(left, parent.getPaddingTop(), right, parent.getHeight() - parent.getPaddingBottom());} else {left = 0;right = parent.getWidth();}int childCount = parent.getChildCount();//当最后一个子项的时候去除下划线for (int i = 0; i < childCount - 1; ++i) {View child = parent.getChildAt(i);parent.getDecoratedBoundsWithMargins(child, this.mBounds);int bottom = this.mBounds.bottom + Math.round(child.getTranslationY());int top = bottom - this.mDivider.getIntrinsicHeight();this.mDivider.setBounds(left, top, right, bottom);this.mDivider.draw(canvas);}canvas.restore();}private void drawHorizontal(Canvas canvas, RecyclerView parent) {canvas.save();int top;int bottom;if (parent.getClipToPadding()) {top = parent.getPaddingTop();bottom = parent.getHeight() - parent.getPaddingBottom();canvas.clipRect(parent.getPaddingLeft(), top, parent.getWidth() - parent.getPaddingRight(), bottom);} else {top = 0;bottom = parent.getHeight();}int childCount = parent.getChildCount();for (int i = 0; i < childCount - 1; ++i) {View child = parent.getChildAt(i);parent.getLayoutManager().getDecoratedBoundsWithMargins(child, this.mBounds);int right = this.mBounds.right + Math.round(child.getTranslationX());int left = right - this.mDivider.getIntrinsicWidth();this.mDivider.setBounds(left, top, right, bottom);this.mDivider.draw(canvas);}canvas.restore();}@Overridepublic void getItemOffsets(Rect outRect, View view, RecyclerView parent, State state) {if (this.mDivider == null) {outRect.set(0, 0, 0, 0);} else {if (this.mOrientation == 1) {//纵向RecyclerViewoutRect.set(0, 0, 0, this.mDivider.getIntrinsicHeight());} else {//横向RecyclerViewint childAdapterPosition = parent.getChildAdapterPosition(view);int lastCount = parent.getAdapter().getItemCount() - 1;//如果不是最后一条 正常赋值 如果是最后一条 赋值为0if (childAdapterPosition != lastCount){outRect.set(0, 0, this.mDivider.getIntrinsicWidth(), 0);} else {outRect.set(0, 0, 0, 0);}}}}
}

引用

MyItemDecoration dividerItemDecoration = new MyItemDecoration(mContext, DividerItemDecoration.HORIZONTAL);dividerItemDecoration.setDrawable(getResources().getDrawable(R.drawable.home_recycler_divider));recyclerViewHor.addItemDecoration(dividerItemDecoration);

关于这个自定义的分割线也附上

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