package com.ckr.decoration;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.annotation.DrawableRes;
import android.support.annotation.IntRange;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.view.View;
import static com.ckr.decoration.DecorationLog.Logd;
import static com.ckr.decoration.DecorationLog.Loge;
/**
* Created by PC大佬 on 2018/1/6.
*/
public class DividerGridItemDecoration extends BaseItemDecoration {
private static final String TAG = "GridItemDecoration";
protected int mSpanCount = 1;
private Drawable mTopDivider; //item上方分割线的drawable
private Drawable mBottomDivider; //item下方分割线的drawable
private Drawable mLeftDivider; //item左边方分割线的drawable
private Drawable mRightDivider; //item右方分割线的drawable
private boolean isSticky;//固定头部
private int mStickyHeightOrWidth;//固定头部高度或宽度
private Drawable mStickyDrawable;//固定头部样式
private int mStickyTextPaddingLeft = 48;//固定头部的文本左边距
private int mStickyTextPaddingTop = 60;//固定头部的文本上边距
private int mStickyTextColor = Color.WHITE;//固定头部的文本的字体颜色
private int mStickyTextSize = 42;//固定头部的文本的字体大小
private Paint mStickyTextPaint;
private float mOffsetY;//字体中间线到基准线baseline的偏移量
private float mTextHeight;
public DividerGridItemDecoration(Context context, int mSpanCount) {
super(context, GRID, VERTICAL);
this.mSpanCount = mSpanCount;
}
public DividerGridItemDecoration(Context context, int orientation, int mSpanCount) {
super(context, GRID, orientation);
this.mSpanCount = mSpanCount;
}
public DividerGridItemDecoration(Context context, int orientation, int mSpanCount, @DrawableRes int drawableId) {
super(context, GRID, orientation, drawableId);
this.mSpanCount = mSpanCount;
}
private DividerGridItemDecoration(Builder builder) {
super(builder);
this.mSpanCount = builder.mSpanCount;
this.isSticky = builder.isSticky;
this.mStickyHeightOrWidth = builder.mStickyHeightOrWidth;
this.mStickyDrawable = builder.mStickyDrawable;
this.mStickyTextPaddingLeft = builder.mStickyTextPaddingLeft;
this.mStickyTextPaddingTop = builder.mStickyTextPaddingTop;
this.mStickyTextColor = builder.mStickyTextColor;
this.mStickyTextSize = builder.mStickyTextSize;
if (isSticky) {
mStickyTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mStickyTextPaint.setColor(mStickyTextColor);//注意：颜色需为argb，否则，绘制不出
mStickyTextPaint.setTextSize(mStickyTextSize);
if (mOrientation == HORIZONTAL) {
mStickyTextPaint.setTextAlign(Paint.Align.CENTER);
}
Paint.FontMetricsInt mFontMetricsInt = mStickyTextPaint.getFontMetricsInt();
mTextHeight = (mFontMetricsInt.descent - mFontMetricsInt.ascent);
float textCenter = mTextHeight / 2.0f;
mOffsetY = -mFontMetricsInt.ascent - textCenter;
}
}
public DividerGridItemDecoration setShowOtherStyle(boolean showOtherStyle) {
isShowOtherStyle = showOtherStyle;
return this;
}
public BaseItemDecoration setSticky(boolean sticky) {
isSticky = sticky;
return this;
}
public BaseItemDecoration setStickyHeightOrWidth(@IntRange(from = 0) int stickyHeaderHeight) {
this.mStickyHeightOrWidth = stickyHeaderHeight;
return this;
}
public BaseItemDecoration setStickyDrawable(@DrawableRes int drawableId) {
this.mStickyDrawable = ContextCompat.getDrawable(mContext.getApplicationContext(), drawableId);
;
if (this.mStickyHeightOrWidth == 0) {
this.mStickyHeightOrWidth = mStickyDrawable.getIntrinsicHeight();
}
return this;
}
public BaseItemDecoration setStickyTextPaddingLeft(int textPaddingLeft) {
this.mStickyTextPaddingLeft = textPaddingLeft;
return this;
}
public BaseItemDecoration setStickyTextPaddingTop(int textPaddingTop) {
this.mStickyTextPaddingTop = textPaddingTop;
return this;
}
/**
* @param textColor 颜色需为argb，否则不生效
* @return
*/
public BaseItemDecoration setStickyTextColor(int textColor) {
this.mStickyTextColor = textColor;
return this;
}
public BaseItemDecoration setStickyTextSize(int textSize) {
this.mStickyTextSize = textSize;
return this;
}
//绘制水平分割线
@Override
protected void drawHorizontal(Canvas c, RecyclerView parent) {
int childCount = parent.getChildCount();//可视item的个数
int itemCount = parent.getAdapter().getItemCount();//item总个数
Logd(TAG, "drawHorizontal: childCount:" + childCount + ",itemCount:" + itemCount);
int left = 0;
int top = 0;
int right = 0;
int bottom = 0;
boolean headerPosHandle = true;
boolean footerPosHandle = true;
boolean isSubDividerHandle = true;
boolean isRedrawDividerHandle = true;
for (int i = 0; i < childCount; i++) {
final View child = parent.getChildAt(i);
final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
.getLayoutParams();
int topDividerHeight = mDividerHeight;
int bottomDividerHeight = mDividerHeight;
mTopDivider = mDivider;
mBottomDivider = mDivider;
if (mOrientation == VERTICAL) {
int leftDividerWidth = mDividerWidth;
int rightDividerWidth = mDividerWidth;
if (noDrawLeftDivider) {//最左边分割线处理
if (i % mSpanCount == 0) {
leftDividerWidth = 0;
}
}
if (noDrawRightDivider) {//最右边分割线处理
if (i % mSpanCount == mSpanCount - 1) {
rightDividerWidth = 0;
}
}
left = child.getLeft() - params.leftMargin - leftDividerWidth;//计算分割线的左边
right = child.getRight() + params.rightMargin + rightDividerWidth;//计算分割线的右边
//<editor-fold desc="顶部分割线绘制与定制">
if (noDrawHeaderDivider) {//顶部分割线处理
if (headerPosHandle) {
int adapterPosition = parent.getChildAdapterPosition(child);
if (mSpanCount > adapterPosition) {
Logd(TAG, "drawHorizontal: noDrawHeaderDivider:" + i + ",adapterPosition:" + adapterPosition);
topDividerHeight = 0;
if (adapterPosition == mSpanCount - 1) {
headerPosHandle = false;
}
} else {
headerPosHandle = false;
}
}
} else {
if (isRedrawHeaderDivider) {//顶部分割线的定制
if (headerPosHandle) {
int adapterPosition = parent.getChildAdapterPosition(child);
if (mSpanCount > adapterPosition) {
Logd(TAG, "drawHorizontal: isRedrawHeaderDivider:" + i + ",adapterPosition:" + adapterPosition);
topDividerHeight = mHeaderDividerHeight;
if (adapterPosition == mSpanCount - 1) {
headerPosHandle = false;
}
if (mHeaderDividerDrawable != null) {
mTopDivider = mHeaderDividerDrawable;
}
} else {
headerPosHandle = false;
}
}
}
}
//</editor-fold>
//<editor-fold desc="底部分割线绘制与定制">
if (noDrawFooterDivider) {//底部分割线处理
if (footerPosHandle) {
int rowNum = itemCount % mSpanCount == 0 ? itemCount / mSpanCount - 1 : itemCount / mSpanCount;
int startNum = childCount - (itemCount - rowNum * mSpanCount);
if (startNum <= i) {
int adapterPosition = parent.getChildAdapterPosition(child);
if (rowNum * mSpanCount <= adapterPosition) {
Logd(TAG, "drawHorizontal: noDrawFooterDivider:" + i + ",adapterPosition:" + adapterPosition);
bottomDividerHeight = 0;
if (adapterPosition == itemCount - 1) {
footerPosHandle = false;
}
} else {
footerPosHandle = false;
}
}
}
} else {
if (isRedrawFooterDivider) {//底部分割线的定制
if (footerPosHandle) {
int rowNum = itemCount % mSpanCount == 0 ? itemCount / mSpanCount - 1 : itemCount / mSpanCount;
int startNum = childCount - (itemCount - rowNum * mSpanCount);
if (startNum <= i) {
int adapterPosition = parent.getChildAdapterPosition(child);
if (rowNum * mSpanCount <= adapterPosition) {
Logd(TAG, "drawHorizontal: isRedrawFooterDivider:" + i + ",adapterPosition:" + adapterPosition);
bottomDividerHeight = mFooterDividerHeight;
if (adapterPosition == itemCount - 1) {
footerPosHandle = false;
}
if (mFooterDividerDrawable != null) {
mBottomDivider = mFooterDividerDrawable;
}
} else {
footerPosHandle = false;
}
}
}
}
}
//</editor-fold>
//<editor-fold desc="分割线批量定制">
if (isSubDivider) {//分割线的截取
if (isSubDividerHandle) {
int adapterPosition = parent.getChildAdapterPosition(child);
int rowCount = itemCount % mSpanCount == 0 ? itemCount / mSpanCount : itemCount / mSpanCount + 1;
int rowNum = (adapterPosition + 1) % mSpanCount == 0 ? (adapterPosition + 1) / mSpanCount - 1 : (adapterPosition + 1) / mSpanCount;
if (rowNum > mStartIndex) {
int maxRow = Math.min(mEndIndex, rowCount - 1);
if (rowNum < maxRow) {
bottomDividerHeight = mSubDividerHeight;
topDividerHeight = mSubDividerHeight;
if (mSubDrawable != null) {
mTopDivider = mSubDrawable;
mBottomDivider = mSubDrawable;
}
} else if (rowNum == maxRow) {
topDividerHeight = mSubDividerHeight;
if (mSubDrawable != null) {
mTopDivider = mSubDrawable;
}
} else {
isSubDividerHandle = false;
}
} else if (rowNum == mStartIndex) {
bottomDividerHeight = mSubDividerHeight;
if (mSubDrawable != null) {
mBottomDivider = mSubDrawable;
}
}
}
}
//</editor-fold>
//<editor-fold desc="分割线定制">
if (isRedrawDivider) {//分割线的定制
if (isRedrawDividerHandle) {
int adapterPosition = parent.getChildAdapterPosition(child);
int rowNum = (adapterPosition + 1) % mSpanCount == 0 ? (adapterPosition + 1) / mSpanCount : (adapterPosition + 1) / mSpanCount + 1;
if ((rowNum - 1) == mDividerIndex) {
bottomDividerHeight = mRedrawDividerHeight;
if (mDividerDrawable != null) {
mBottomDivider = mDividerDrawable;
}
} else if (mDividerIndex + 1 == rowNum - 1) {
topDividerHeight = mRedrawDividerHeight;
if (mDividerDrawable != null) {
mTopDivider = mDividerDrawable;
}
}
}
}
//</editor-fold>
//<editor-fold desc="---item的上方的分割线绘制---">
bottom = child.getTop() - params.topMargin;//计算分割线的下边
top = bottom - topDividerHeight;//计算分割线的上边
mTopDivider.setBounds(left, top, right, bottom);
mTopDivider.draw(c);
//</editor-fold>
//<editor-fold desc="---item的下方的分割线绘制---">
top = child.getBottom() + params.bottomMargin;//计算分割线的上边
bottom = top + bottomDividerHeight;//计算分割线的下边
mBottomDivider.setBounds(left, top, right, bottom);
mBottomDivider.draw(c);
//</editor-fold>
} else {
left = child.getLeft() - params.leftMargin;//计算分割线的左边
right = child.getRight() + params.rightMargin;//计算分割线的右边
if (noDrawHeaderDivider) {//顶部分割线处理
if (i % mSpanCount == 0) {
Loge(TAG, "drawHorizontal: noDrawHeaderDivider:" + i);
topDividerHeight = 0;
}
}
if (noDrawFooterDivider) {//底部分割线处理
if (i % mSpanCount == mSpanCount - 1) {
Loge(TAG, "drawHorizontal: noDrawFooterDivider:" + i);
bottomDividerHeight = 0;
}
}
//<editor-fold desc="---item的上方的分割线绘制---">
bottom = child.getTop() - params.topMargin;//计算分割线的下边
top = bottom - topDividerHeight;//计算分割线的上边
mDivider.setBounds(left, top, right, bottom);
mDivider.draw(c);
//</editor-fold>
//<editor-fold desc="---item的下方的分割线绘制---">
top = child.getBottom() + params.bottomMargin;//计算分割线的上边
bottom = top + bottomDividerHeight;//计算分割线的下边
mDivider.setBounds(left, top, right, bottom);
mDivider.draw(c);
//</editor-fold>
}
}
}
//绘制竖直分割线
@Override
protected void drawVertical(Canvas c, RecyclerView parent) {
final int childCount = parent.getChildCount();//可视item的个数
int itemCount = parent.getAdapter().getItemCount();//item个数
int left = 0;
int top = 0;
int right = 0;
int bottom = 0;
boolean leftPosHandle = true;
boolean rightPosHandle = true;
boolean isSubDividerHandle = true;
boolean isRedrawDividerHandle = true;
for (int i = 0; i < childCount; i++) {
final View child = parent.getChildAt(i);
final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
.getLayoutParams();
int leftDividerWidth = mDividerWidth;
int rightDividerWidth = mDividerWidth;
mLeftDivider = mDivider;
mRightDivider = mDivider;
if (mOrientation == VERTICAL) {
top = child.getTop() - params.topMargin;
bottom = child.getBottom() + params.bottomMargin;
if (noDrawLeftDivider) {
if (i % mSpanCount == 0) {
leftDividerWidth = 0;
}
}
if (noDrawRightDivider) {
if (i % mSpanCount == mSpanCount - 1) {
rightDividerWidth = 0;
}
}
//<editor-fold desc="---item的左边的分割线绘制---">
right = child.getLeft() - params.leftMargin;
left = right - leftDividerWidth;
mDivider.setBounds(left, top, right, bottom);
mDivider.draw(c);
//</editor-fold>
//<editor-fold desc="---item的右边的分割线绘制---">
left = child.getRight() + params.rightMargin;
right = left + rightDividerWidth;
mDivider.setBounds(left, top, right, bottom);
mDivider.draw(c);
//</editor-fold>
} else {
int topDividerWidth = mDividerHeight;
int bottomDividerWidth = mDividerHeight;
if (noDrawHeaderDivider) {//头部分割线处理
if (i % mSpanCount == 0) {
topDividerWidth = 0;
}
}
if (noDrawFooterDivider) {//底部分割线处理
if (i % mSpanCount == mSpanCount - 1) {
bottomDividerWidth = 0;
}
}
top = child.getTop() - params.topMargin - topDividerWidth;
bottom = child.getBottom() + params.bottomMargin + bottomDividerWidth;
//<editor-fold desc="最左边分割线绘制与定制">
if (noDrawLeftDivider) {//左边分割线处理
if (leftPosHandle) {
int adapterPosition = parent.getChildAdapterPosition(child);
if (mSpanCount > adapterPosition) {
Loge(TAG, "drawVertical: noDrawHeaderDivider:" + i + ",adapterPosition:" + adapterPosition);
leftDividerWidth = 0;
if (adapterPosition == mSpanCount - 1) {
leftPosHandle = false;
}
} else {
leftPosHandle = false;
}
}
} else {
if (isRedrawLeftDivider) {//左边分割线定制
if (leftPosHandle) {
int adapterPosition = parent.getChildAdapterPosition(child);
if (mSpanCount > adapterPosition) {
leftDividerWidth = mLeftDividerWidth;
if (adapterPosition == mSpanCount - 1) {
leftPosHandle = false;
}
if (mLeftDividerDrawable != null) {
mLeftDivider = mLeftDividerDrawable;
}
} else {
leftPosHandle = false;
}
}
}
}
//</editor-fold>
//<editor-fold desc="最右边分割线绘制与定制">
if (noDrawRightDivider) {//右边分割线处理
if (rightPosHandle) {
int columnNum = itemCount % mSpanCount == 0 ? itemCount / mSpanCount - 1 : itemCount / mSpanCount;
int startNum = childCount - (itemCount - columnNum * mSpanCount);
if (startNum <= i) {
int adapterPosition = parent.getChildAdapterPosition(child);
if (columnNum * mSpanCount <= adapterPosition) {
Logd(TAG, "drawVertical: noDrawFooterDivider:" + i + ",adapterPosition:" + adapterPosition);
rightDividerWidth = 0;
if (adapterPosition == itemCount - 1) {
rightPosHandle = false;
}
} else {
rightPosHandle = false;
}
}
}
} else {
if (isRedrawRightDivider) {//右边分割线定制
if (rightPosHandle) {
int columnNum = itemCount % mSpanCount == 0 ? itemCount / mSpanCount - 1 : itemCount / mSpanCount;
int startNum = childCount - (itemCount - columnNum * mSpanCount);
if (startNum <= i) {
int adapterPosition = parent.getChildAdapterPosition(child);
if (columnNum * mSpanCount <= adapterPosition) {
Logd(TAG, "drawVertical: noDrawFooterDivider:" + i + ",adapterPosition:" + adapterPosition);
rightDividerWidth = mRightDividerWidth;
if (adapterPosition == itemCount - 1) {
rightPosHandle = false;
}
if (mRightDividerDrawable != null) {
mRightDivider = mRightDividerDrawable;
}
} else {
rightPosHandle = false;
}
}
}
}
}
//</editor-fold>
//<editor-fold desc="分割线批量定制">
if (isSubDivider) {//分割线的截取
if (isSubDividerHandle) {
int adapterPosition = parent.getChildAdapterPosition(child);
int rowCount = itemCount % mSpanCount == 0 ? itemCount / mSpanCount : itemCount / mSpanCount + 1;
int rowNum = (adapterPosition + 1) % mSpanCount == 0 ? (adapterPosition + 1) / mSpanCount - 1 : (adapterPosition + 1) / mSpanCount;
if (rowNum > mStartIndex) {
Loge(TAG, "drawVertical: mStartIndex:" + mStartIndex + ",mEndIndex:" + mEndIndex + ",adapterPosition:" + adapterPosition);
int maxRow = Math.min(mEndIndex, rowCount - 1);
if (rowNum < maxRow) {
leftDividerWidth = mSubDividerWidth;
rightDividerWidth = mSubDividerWidth;
if (mSubDrawable != null) {
mLeftDivider = mSubDrawable;
mRightDivider = mSubDrawable;
}
} else if (rowNum == maxRow) {
leftDividerWidth = mSubDividerWidth;
if (mSubDrawable != null) {
mLeftDivider = mSubDrawable;
}
} else {
isSubDividerHandle = false;
}
} else if (rowNum == mStartIndex) {
rightDividerWidth = mSubDividerWidth;
if (mSubDrawable != null) {
mRightDivider = mSubDrawable;
}
}
}
}
//</editor-fold>
//<editor-fold desc="分割线定制">
if (isRedrawDivider) {//分割线的定制
if (isRedrawDividerHandle) {
int adapterPosition = parent.getChildAdapterPosition(child);
int rowNum = (adapterPosition + 1) % mSpanCount == 0 ? (adapterPosition + 1) / mSpanCount : (adapterPosition + 1) / mSpanCount + 1;
if ((rowNum - 1) == mDividerIndex) {
rightDividerWidth = mRedrawDividerWidth;
if (mDividerDrawable != null) {
mRightDivider = mDividerDrawable;
}
} else if (mDividerIndex + 1 == rowNum - 1) {
leftDividerWidth = mRedrawDividerWidth;
if (mDividerDrawable != null) {
mLeftDivider = mDividerDrawable;
}
}
}
}
//</editor-fold>
//<editor-fold desc="---item的左边的分割线绘制---">
right = child.getLeft() - params.leftMargin;
left = right - leftDividerWidth;
mLeftDivider.setBounds(left, top, right, bottom);
mLeftDivider.draw(c);
//</editor-fold>
//<editor-fold desc="---item的右边的分割线绘制---">
left = child.getRight() + params.rightMargin;
right = left + rightDividerWidth;
mRightDivider.setBounds(left, top, right, bottom);
mRightDivider.draw(c);
//</editor-fold>
}
}
}
/**
* 要想清楚outRect作用，请看{@link android.support.v7.widget.GridLayoutManager}源码，如：measureChild().
*/
@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
int itemPosition = parent.getChildAdapterPosition(view);
Loge(TAG, "getItemOffsets: pos:" + itemPosition);
int left = mDividerWidth;
int top = mDividerHeight;
int right = mDividerWidth;
int bottom = mDividerHeight;
if (mOrientation == VERTICAL) {
//<editor-folder desc="悬浮头部">
if (isSticky) {//悬浮头部
RecyclerView.Adapter adapter = parent.getAdapter();
if (adapter instanceof OnHeaderListener) {
OnHeaderListener listener = ((OnHeaderListener) adapter);
String headerName = listener.getHeaderName(itemPosition);
if (!TextUtils.isEmpty(headerName)) {
if (itemPosition == 0 || !headerName.equals(listener.getHeaderName(itemPosition - 1))) {
Logd(TAG, "getItemOffsets: headerName:" + headerName + ",itemPosition:" + itemPosition);
top = mStickyHeightOrWidth;
outRect.set(0, top, 0, bottom);
return;
}
}
}
}
//</editor-folder>
//<editor-fold desc="顶部分割线绘制与定制">
if (noDrawHeaderDivider) {
if (mSpanCount > itemPosition) {
Logd(TAG, "getItemOffsets: noDrawHeaderDivider:" + itemPosition);
top = 0;
}
} else {
if (isRedrawHeaderDivider) {
if (mSpanCount > itemPosition) {
Loge(TAG, "getItemOffsets: isRedrawHeaderDivider:" + itemPosition);
top = mHeaderDividerHeight;
}
}
}
//</editor-fold>
//<editor-fold desc="底部分割线绘制与定制">
if (noDrawFooterDivider) {
int itemCount = parent.getAdapter().getItemCount();
int rowNum = itemCount % mSpanCount == 0 ? itemCount / mSpanCount - 1 : itemCount / mSpanCount;
if (rowNum * mSpanCount <= itemPosition) {
Logd(TAG, "getItemOffsets: noDrawFooterDivider:" + itemPosition);
bottom = 0;
}
} else {
if (isRedrawFooterDivider) {
int itemCount = parent.getAdapter().getItemCount();
int rowNum = itemCount % mSpanCount == 0 ? itemCount / mSpanCount - 1 : itemCount / mSpanCount;
if (rowNum * mSpanCount <= itemPosition) {
bottom = mFooterDividerHeight;
}
}
}
//</editor-fold>
if (noDrawLeftDivider) {
if (itemPosition % mSpanCount == 0) {
left = 0;
}
}
if (noDrawRightDivider) {
if (itemPosition % mSpanCount == mSpanCount - 1) {
right = 0;
}
}
//<editor-fold desc="分割线批量定制">
if (isSubDivider) {
int itemCount = parent.getAdapter().getItemCount();
int rowCount = itemCount % mSpanCount == 0 ? itemCount / mSpanCount : itemCount / mSpanCount + 1;
if (mStartIndex >= rowCount - 1) {
isSubDivider = false;
} else {
int rowNum = (itemPosition + 1) % mSpanCount == 0 ? (itemPosition + 1) / mSpanCount - 1 : (itemPosition + 1) / mSpanCount;//计算第几行
if (rowNum > mStartIndex) {
int maxRow = Math.min(mEndIndex, rowCount - 1);
if (rowNum < maxRow) {
top = mSubDividerHeight;
bottom = mSubDividerHeight;
} else if (rowNum == maxRow) {
top = mSubDividerHeight;
}
} else if (rowNum == mStartIndex) {
bottom = mSubDividerHeight;
}
}
}
//</editor-fold>
//<editor-fold desc="分割线定制">
if (isRedrawDivider) {
int itemCount = parent.getAdapter().getItemCount();
int rowCount = itemCount % mSpanCount == 0 ? itemCount / mSpanCount : itemCount / mSpanCount + 1;//计算总行数
if (mDividerIndex >= rowCount - 1) {
isRedrawDivider = false;
}
int rowNum = (itemPosition + 1) % mSpanCount == 0 ? (itemPosition + 1) / mSpanCount : (itemPosition + 1) / mSpanCount + 1;//计算第几行
if ((rowNum - 1) == mDividerIndex) {
bottom = mRedrawDividerHeight;
} else if (mDividerIndex + 1 == rowNum - 1) {
top = mRedrawDividerHeight;
}
}
//</editor-fold>
} else {
if (noDrawHeaderDivider) {
if (itemPosition % mSpanCount == 0) {
Logd(TAG, "getItemOffsets: noDrawHeaderDivider:" + itemPosition);
top = 0;
}
}
if (noDrawFooterDivider) {
if (itemPosition % mSpanCount == mSpanCount - 1) {
Loge(TAG, "getItemOffsets: noDrawFooterDivider:" + itemPosition);
bottom = 0;
}
}
//<editor-fold desc="最左边分割线绘制与定制">
if (noDrawLeftDivider) {
if (mSpanCount > itemPosition) {
Loge(TAG, "getItemOffsets: noDrawLeftDivider:" + itemPosition);
left = 0;
}
} else {
if (isRedrawLeftDivider) {
if (mSpanCount > itemPosition) {
Loge(TAG, "getItemOffsets: isRedrawLeftDivider:" + itemPosition);
left = mLeftDividerWidth;
}
}
}
//</editor-fold>
//<editor-fold desc="最右边分割线绘制与定制">
if (noDrawRightDivider) {
int itemCount = parent.getAdapter().getItemCount();
int columnCount = itemCount % mSpanCount == 0 ? itemCount / mSpanCount - 1 : itemCount / mSpanCount;
if (columnCount * mSpanCount <= itemPosition) {
right = 0;
}
} else {
if (isRedrawRightDivider) {
int itemCount = parent.getAdapter().getItemCount();
int columnCount = itemCount % mSpanCount == 0 ? itemCount / mSpanCount - 1 : itemCount / mSpanCount;
if (columnCount * mSpanCount <= itemPosition) {
right = mRightDividerWidth;
}
}
}
//</editor-fold>
//<editor-fold desc="分割线批量定制">
if (isSubDivider) {
int itemCount = parent.getAdapter().getItemCount();
int rowCount = itemCount % mSpanCount == 0 ? itemCount / mSpanCount : itemCount / mSpanCount + 1;
if (mStartIndex >= rowCount - 1) {
isSubDivider = false;
} else {
int rowNum = (itemPosition + 1) % mSpanCount == 0 ? (itemPosition + 1) / mSpanCount - 1 : (itemPosition + 1) / mSpanCount;//计算第几行
if (rowNum > mStartIndex) {
int maxRow = Math.min(mEndIndex, rowCount - 1);
if (rowNum < maxRow) {
left = mSubDividerWidth;
right = mSubDividerWidth;
} else if (rowNum == maxRow) {
left = mSubDividerWidth;
}
} else if (rowNum == mStartIndex) {
right = mSubDividerWidth;
}
}
}
//</editor-fold>
//<editor-fold desc="分割线定制">
if (isRedrawDivider) {
int itemCount = parent.getAdapter().getItemCount();
int rowCount = itemCount % mSpanCount == 0 ? itemCount / mSpanCount : itemCount / mSpanCount + 1;//计算总行数
if (mDividerIndex >= rowCount - 1) {
isRedrawDivider = false;
}
int rowNum = (itemPosition + 1) % mSpanCount == 0 ? (itemPosition + 1) / mSpanCount : (itemPosition + 1) / mSpanCount + 1;//计算第几行
if ((rowNum - 1) == mDividerIndex) {
right = mRedrawDividerWidth;
} else if (mDividerIndex + 1 == rowNum - 1) {
left = mRedrawDividerWidth;
}
}
//</editor-fold>
}
/*
* left：代表item的左边分割线占有的x轴长度
* top：代表item的顶部分割线占有的y轴长度
* right：代表item的右边分割线占有的x轴长度
* bottom：代表item的底部分割线占有的y轴长度
* */
if (isShowOtherStyle) {
outRect.set(0, top, right, 0);
} else {
outRect.set(left, top, right, bottom);
}
}
public static class Builder extends BaseBuilder {
private int mSpanCount = 1;
private boolean isSticky;//固定头部
private int mStickyHeightOrWidth;//固定头部高度或宽度
private Drawable mStickyDrawable;//固定头部样式
private int mStickyTextPaddingLeft = 48;//固定头部的文本左边距
private int mStickyTextPaddingTop = 60;//固定头部的文本上边距
private int mStickyTextColor = Color.WHITE;//固定头部的文本的字体颜色
private int mStickyTextSize = 42;//固定头部的文本的字体大小
public Builder(Context context, int mSpanCount) {
super(context, GRID);
this.mSpanCount = mSpanCount;
if (this.mSpanCount == 1) {
noDrawLeftDivider = true;
noDrawRightDivider = true;
}
}
public Builder(Context context, int mOrientation, int mSpanCount) {
super(context, GRID, mOrientation);
this.mSpanCount = mSpanCount;
if (this.mSpanCount == 1) {
noDrawLeftDivider = true;
noDrawRightDivider = true;
}
}
public BaseBuilder setShowOtherStyle(boolean showOtherStyle) {
this.isShowOtherStyle = showOtherStyle;
return this;
}
public Builder setSticky(boolean sticky) {
isSticky = sticky;
return this;
}
public Builder setStickyHeightOrWidth(@IntRange(from = 0) int stickyHeaderHeight) {
this.mStickyHeightOrWidth = stickyHeaderHeight;
return this;
}
public Builder setStickyDrawable(@DrawableRes int drawableId) {
this.mStickyDrawable = ContextCompat.getDrawable(mContext.getApplicationContext(), drawableId);
;
if (this.mStickyHeightOrWidth == 0) {
this.mStickyHeightOrWidth = mStickyDrawable.getIntrinsicHeight();
}
return this;
}
public Builder setStickyTextPaddingLeft(int textPaddingLeft) {
this.mStickyTextPaddingLeft = textPaddingLeft;
return this;
}
public Builder setStickyTextPaddingTop(int textPaddingTop) {
this.mStickyTextPaddingTop = textPaddingTop;
return this;
}
/**
* @param textColor 颜色需为argb，否则不生效
* @return
*/
public Builder setStickyTextColor(int textColor) {
this.mStickyTextColor = textColor;
return this;
}
public Builder setStickyTextSize(int textSize) {
this.mStickyTextSize = textSize;
return this;
}
public DividerGridItemDecoration build() {
return new DividerGridItemDecoration(this);
}
}
}
