package com.haicaojie.android.util.view;
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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.annotation.ColorRes;
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import android.support.v7.widget.GridLayoutManager;
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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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* Created by weikou2015 on 2018/1/22.
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*/
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public class MyDividerItemDecoration extends RecyclerView.ItemDecoration {
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private int space;
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private int color = -1;
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private Drawable mDivider;
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private Paint mPaint;
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private int type;
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public int getColor() {
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return color;
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}
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public void setColor(@ColorRes int color) {
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this.color = color;
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}
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public MyDividerItemDecoration(int space) {
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this.space = space;
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}
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public MyDividerItemDecoration(int space, int color) {
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this.space = space;
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this.color = color;
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mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
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mPaint.setColor(color);
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mPaint.setStyle(Paint.Style.FILL);
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mPaint.setStrokeWidth(space * 2);
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}
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public MyDividerItemDecoration(int space, int color, int type) {
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this.space = space;
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this.color = color;
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mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
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mPaint.setColor(color);
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mPaint.setStyle(Paint.Style.FILL);
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mPaint.setStrokeWidth(space * 2);
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this.type = type;
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}
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public MyDividerItemDecoration(int space, Drawable mDivider) {
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this.space = space;
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this.mDivider = mDivider;
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}
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@Override
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public void getItemOffsets(Rect outRect, View view,
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RecyclerView parent, RecyclerView.State state) {
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if (parent.getLayoutManager() != null) {
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if (parent.getLayoutManager() instanceof LinearLayoutManager && !(parent.getLayoutManager() instanceof GridLayoutManager)) {
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if (((LinearLayoutManager) parent.getLayoutManager()).getOrientation() == LinearLayoutManager.HORIZONTAL) {
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outRect.set(space, 0, space, 0);
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} else {
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outRect.set(0, space, 0, space);
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}
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} else {
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outRect.set(space, space, space, space);
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}
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}
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}
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@Override
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public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
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super.onDraw(c, parent, state);
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if (parent.getLayoutManager() != null) {
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if (parent.getLayoutManager() instanceof LinearLayoutManager && !(parent.getLayoutManager() instanceof GridLayoutManager)) {
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if (((LinearLayoutManager) parent.getLayoutManager()).getOrientation() == LinearLayoutManager.HORIZONTAL) {
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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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} else {
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if (type == 0) {
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drawGrideview(c, parent);
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} else {
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drawGrideview1(c, parent);
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}
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}
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}
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}
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//绘制纵向 item 分割线
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private void drawVertical(Canvas canvas, RecyclerView parent) {
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final int top = parent.getPaddingTop();
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final int bottom = parent.getMeasuredHeight() - parent.getPaddingBottom();
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final int childSize = parent.getChildCount();
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for (int i = 0; i < childSize; i++) {
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final View child = parent.getChildAt(i);
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RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams();
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final int left = child.getRight() + layoutParams.rightMargin;
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final int right = left + space;
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if (mDivider != null) {
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mDivider.setBounds(left, top, right, bottom);
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mDivider.draw(canvas);
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}
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if (mPaint != null) {
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canvas.drawRect(left, top, right, bottom, mPaint);
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}
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}
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}
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//绘制横向 item 分割线
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private void drawHorizontal(Canvas canvas, RecyclerView parent) {
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int left = parent.getPaddingLeft();
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int right = parent.getMeasuredWidth() - parent.getPaddingRight();
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final int childSize = parent.getChildCount();
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for (int i = 0; i < childSize; i++) {
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final View child = parent.getChildAt(i);
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RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams();
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int top = child.getBottom() + layoutParams.bottomMargin;
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int bottom = top + space;
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if (mDivider != null) {
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mDivider.setBounds(left, top, right, bottom);
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mDivider.draw(canvas);
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}
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if (mPaint != null) {
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canvas.drawRect(left, top, right, bottom, mPaint);
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}
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}
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}
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//绘制grideview item 分割线 不是填充满的
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private void drawGrideview(Canvas canvas, RecyclerView parent) {
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GridLayoutManager linearLayoutManager = (GridLayoutManager) parent.getLayoutManager();
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int childSize = parent.getChildCount();
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int other = parent.getChildCount() / linearLayoutManager.getSpanCount() - 1;
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if (other < 1) {
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other = 1;
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}
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other = other * linearLayoutManager.getSpanCount();
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if (parent.getChildCount() < linearLayoutManager.getSpanCount()) {
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other = parent.getChildCount();
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}
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int top, bottom, left, right, spancount;
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spancount = linearLayoutManager.getSpanCount() - 1;
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for (int i = 0; i < childSize; i++) {
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final View child = parent.getChildAt(i);
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RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams();
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if (i < other) {
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top = child.getBottom() + layoutParams.bottomMargin;
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bottom = top + space;
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left = (layoutParams.leftMargin + space) * (i + 1);
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right = child.getMeasuredWidth() * (i + 1) + left + space * i;
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if (mDivider != null) {
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mDivider.setBounds(left, top, right, bottom);
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mDivider.draw(canvas);
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}
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if (mPaint != null) {
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canvas.drawRect(left, top, right, bottom, mPaint);
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}
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}
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if (i != spancount) {
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top = (layoutParams.topMargin + space) * (i / linearLayoutManager.getSpanCount() + 1);
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bottom = (child.getMeasuredHeight() + space) * (i / linearLayoutManager.getSpanCount() + 1) + space;
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left = child.getRight() + layoutParams.rightMargin;
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right = left + space;
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if (mDivider != null) {
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mDivider.setBounds(left, top, right, bottom);
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mDivider.draw(canvas);
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}
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if (mPaint != null) {
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canvas.drawRect(left, top, right, bottom, mPaint);
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}
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} else {
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spancount += 4;
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}
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}
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}
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/***/
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private void drawGrideview1(Canvas canvas, RecyclerView parent) {
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GridLayoutManager linearLayoutManager = (GridLayoutManager) parent.getLayoutManager();
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int childSize = parent.getChildCount();
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int top, bottom, left, right, spancount;
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spancount = linearLayoutManager.getSpanCount();
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for (int i = 0; i < childSize; i++) {
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final View child = parent.getChildAt(i);
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//画横线
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RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) child.getLayoutParams();
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top = child.getBottom() + layoutParams.bottomMargin;
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bottom = top + space;
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left = layoutParams.leftMargin + child.getPaddingLeft() + space;
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right = child.getMeasuredWidth() * (i + 1) + left + space * i;
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if (mDivider != null) {
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mDivider.setBounds(left, top, right, bottom);
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mDivider.draw(canvas);
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}
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if (mPaint != null) {
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canvas.drawRect(left, top, right, bottom, mPaint);
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}
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//画竖线
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top = (layoutParams.topMargin + space) * (i / linearLayoutManager.getSpanCount() + 1);
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bottom = (child.getMeasuredHeight() + space) * (i / linearLayoutManager.getSpanCount() + 1) + space;
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left = child.getRight() + layoutParams.rightMargin;
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right = left + space;
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if (mDivider != null) {
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mDivider.setBounds(left, top, right, bottom);
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mDivider.draw(canvas);
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}
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if (mPaint != null) {
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canvas.drawRect(left, top, right, bottom, mPaint);
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}
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//画上缺失的线框
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if (i < spancount) {
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top = child.getTop() + layoutParams.topMargin;
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bottom = top + space;
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left = (layoutParams.leftMargin + space) * (i + 1);
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right = child.getMeasuredWidth() * (i + 1) + left + space * i;
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if (mDivider != null) {
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mDivider.setBounds(left, top, right, bottom);
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mDivider.draw(canvas);
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}
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if (mPaint != null) {
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canvas.drawRect(left, top, right, bottom, mPaint);
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}
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}
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if (i % spancount == 0) {
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top = (layoutParams.topMargin + space) * (i / linearLayoutManager.getSpanCount() + 1);
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bottom = (child.getMeasuredHeight() + space) * (i / linearLayoutManager.getSpanCount() + 1) + space;
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left = child.getLeft() + layoutParams.leftMargin;
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right = left + space;
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if (mDivider != null) {
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mDivider.setBounds(left, top, right, bottom);
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mDivider.draw(canvas);
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}
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if (mPaint != null) {
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canvas.drawRect(left, top, right, bottom, mPaint);
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}
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}
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}
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}
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}
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