解決RecycleView分割線不居中的三種方法
本文為大家分享了三種RecycleView分割線不居中的解決方法,供大家參考,具體內(nèi)容和如下
方法一:
public class SpacesItemDecoration extends RecyclerView.ItemDecoration { private int mSpace; private int mSpanCount; // RecyclerView有多少列 private boolean mHasPadding; // RecyclerView是否有Padding public SpacesItemDecoration(int mSpace) { this.mSpace = mSpace; this.mHasPadding = true; } public SpacesItemDecoration(int mSpace, boolean hasPadding) { this.mSpace = mSpace; this.mHasPadding = hasPadding; } @Override public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) { // 初始化列數(shù) if (mSpanCount == 0) { this.mSpanCount = ((GridLayoutManager) parent.getLayoutManager()).getSpanCount(); } int position = parent.getChildAdapterPosition(view); // item position int column = position % mSpanCount; // item column if (mHasPadding) { outRect.left = mSpace - column * mSpace / mSpanCount; // spacing - column * ((1f / spanCount) * spacing) outRect.right = (column + 1) * mSpace / mSpanCount; // (column + 1) * ((1f / spanCount) * spacing) if (position < mSpanCount) { // top edge outRect.top = mSpace; } outRect.bottom = mSpace; // item bottom } else { outRect.left = column * mSpace / mSpanCount; // column * ((1f / spanCount) * spacing) outRect.right = mSpace - (column + 1) * mSpace / mSpanCount; // spacing - (column + 1) * ((1f / spanCount) * spacing) if (position >= mSpanCount) { outRect.top = mSpace; // item top } } } public void setHasPadding(boolean hasPadding) { this.mHasPadding = hasPadding; } }
方法二:
public class MutiItemDecoration extends RecyclerView.ItemDecoration { public enum Type { VERTICAL, HORIZONTAL, ALL } private Type type;//分割線類(lèi)型 private int dividerSize = 10;//分割線尺寸 public MutiItemDecoration(MutiItemDecoration.Type type, int dividerSize) { this.type = type; this.dividerSize = dividerSize; } @Override public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) { int spanCount = getSpanCount(parent); int childCount = parent.getAdapter().getItemCount(); switch (type) { case ALL: if (itemPosition % spanCount == 0) {//第一列 if (isLastRaw(parent, itemPosition, spanCount, childCount)) { outRect.set(0, 0, dividerSize / 2, 0); } else { outRect.set(0, 0, dividerSize / 2, dividerSize); } } else if (itemPosition % spanCount == spanCount - 1) {//最后一列 if (isLastRaw(parent, itemPosition, spanCount, childCount)) { outRect.set(dividerSize / 2, 0, 0, 0); } else { outRect.set(dividerSize / 2, 0, 0, dividerSize); } } else {//中間列 if (isLastRaw(parent, itemPosition, spanCount, childCount)) { outRect.set(dividerSize / 2, 0, dividerSize / 2, 0); } else { outRect.set(dividerSize / 2, 0, dividerSize / 2, dividerSize); } } break; case VERTICAL: if (isLastRaw(parent, itemPosition, spanCount, childCount)) { outRect.set(0, 0, 0, 0); } else { outRect.set(0, 0, 0, dividerSize); } break; case HORIZONTAL: if (isLastColum(parent, itemPosition, spanCount, childCount)) { outRect.set(0, 0, 0, 0); } else { outRect.set(0, 0, dividerSize, 0); } break; } } // 是否是最后一列 private boolean isLastColum(RecyclerView parent, int pos, int spanCount, int childCount) { RecyclerView.LayoutManager layoutManager = parent.getLayoutManager(); if (layoutManager instanceof GridLayoutManager) { if ((pos + 1) % spanCount == 0) return true; } else { if (pos == childCount - 1) return true; } return false; } // 是否是最后一行 private boolean isLastRaw(RecyclerView parent, int pos, int spanCount, int childCount) { RecyclerView.LayoutManager layoutManager = parent.getLayoutManager(); if (layoutManager instanceof GridLayoutManager) { childCount = childCount - childCount % spanCount; if (pos >= childCount) return true; } else { if (pos == childCount - 1) return true; } return false; } //返回列數(shù) private int getSpanCount(RecyclerView parent) { RecyclerView.LayoutManager layoutManager = parent.getLayoutManager(); if (layoutManager instanceof GridLayoutManager) { return ((GridLayoutManager) layoutManager).getSpanCount(); } return -1; } }
方法三:(目前只支持2列)
public class DividerGridItemDecoration extends RecyclerView.ItemDecoration { private static final int[] ATTRS = new int[]{android.R.attr.listDivider}; private Drawable mDivider; public DividerGridItemDecoration(Context context) { final TypedArray a = context.obtainStyledAttributes(ATTRS); mDivider = ContextCompat.getDrawable(context, R.drawable.shape_divider); a.recycle(); } @Override public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) { drawHorizontal(c, parent); drawVertical(c, parent); } private int getSpanCount(RecyclerView parent) { // 列數(shù) int spanCount = -1; RecyclerView.LayoutManager layoutManager = parent.getLayoutManager(); if (layoutManager instanceof GridLayoutManager) { spanCount = ((GridLayoutManager) layoutManager).getSpanCount(); } else if (layoutManager instanceof StaggeredGridLayoutManager) { spanCount = ((StaggeredGridLayoutManager) layoutManager) .getSpanCount(); } return spanCount; } public void drawHorizontal(Canvas c, RecyclerView parent) { 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.getLeft() - params.leftMargin; final int right = child.getRight() + params.rightMargin + mDivider.getIntrinsicWidth(); final int top = child.getBottom() + params.bottomMargin; final int bottom = top + mDivider.getIntrinsicHeight(); mDivider.setBounds(left, top, right, bottom); mDivider.draw(c); } } public void drawVertical(Canvas c, RecyclerView parent) { 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(); if (i % 2 == 1) { final int top = child.getTop() - params.topMargin; final int bottom = child.getBottom() + params.bottomMargin; final int left = child.getLeft() - params.rightMargin; final int right = left + mDivider.getIntrinsicWidth() / 2; mDivider.setBounds(left, top, right, bottom); mDivider.draw(c); } else { final int top = child.getTop() - params.topMargin; final int bottom = child.getBottom() + params.bottomMargin; final int left = child.getRight() + params.rightMargin; final int right = left + mDivider.getIntrinsicWidth() / 2; mDivider.setBounds(left, top, right, bottom); mDivider.draw(c); } final int top = child.getTop() - params.topMargin; final int bottom = child.getBottom() + params.bottomMargin; final int left = child.getRight() + params.rightMargin; final int right = left + mDivider.getIntrinsicWidth(); mDivider.setBounds(left, top, right, bottom); mDivider.draw(c); } } private boolean isLastColum(RecyclerView parent, int pos, int spanCount, int childCount) { RecyclerView.LayoutManager layoutManager = parent.getLayoutManager(); if (layoutManager instanceof GridLayoutManager) { if ((pos + 1) % spanCount == 0)// 如果是最后一列,則不需要繪制右邊 { return true; } } else if (layoutManager instanceof StaggeredGridLayoutManager) { int orientation = ((StaggeredGridLayoutManager) layoutManager) .getOrientation(); if (orientation == StaggeredGridLayoutManager.VERTICAL) { if ((pos + 1) % spanCount == 0)// 如果是最后一列,則不需要繪制右邊 { return true; } } else { childCount = childCount - childCount % spanCount; if (pos >= childCount)// 如果是最后一列,則不需要繪制右邊 return true; } } return false; } private boolean isLastRaw(RecyclerView parent, int pos, int spanCount, int childCount) { RecyclerView.LayoutManager layoutManager = parent.getLayoutManager(); if (layoutManager instanceof GridLayoutManager) { childCount = childCount - childCount % spanCount; if (pos >= childCount)// 如果是最后一行,則不需要繪制底部 return true; } else if (layoutManager instanceof StaggeredGridLayoutManager) { int orientation = ((StaggeredGridLayoutManager) layoutManager) .getOrientation(); // StaggeredGridLayoutManager 且縱向滾動(dòng) if (orientation == StaggeredGridLayoutManager.VERTICAL) { childCount = childCount - childCount % spanCount; // 如果是最后一行,則不需要繪制底部 if (pos >= childCount) return true; } else // StaggeredGridLayoutManager 且橫向滾動(dòng) { // 如果是最后一行,則不需要繪制底部 if ((pos + 1) % spanCount == 0) { return true; } } } return false; } @Override public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) { int spanCount = getSpanCount(parent); int childCount = parent.getAdapter().getItemCount(); if (isLastRaw(parent, itemPosition, spanCount, childCount))// 如果是最后一行,則不需要繪制底部 { outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0); } else if (isLastColum(parent, itemPosition, spanCount, childCount))// 如果是最后一列,則不需要繪制右邊 { outRect.set(0, 0, 0, mDivider.getIntrinsicHeight()); } else { outRect.set(0, 0, mDivider.getIntrinsicWidth(), mDivider.getIntrinsicHeight()); } } }
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。
- Android RecycleView使用(CheckBox全選、反選、單選)
- Android 中RecycleView實(shí)現(xiàn)item的點(diǎn)擊事件
- Android recycleView的應(yīng)用和點(diǎn)擊事件實(shí)例詳解
- Android ListView與RecycleView的對(duì)比使用解析
- Android App中ViewPager所帶來(lái)的滑動(dòng)沖突問(wèn)題解決方法
- Android中DrawerLayout+ViewPager滑動(dòng)沖突的解決方法
- 淺談Viewpager和輪播圖的沖突解決方法
- Android 中SwipeRefreshLayout與ViewPager滑動(dòng)事件沖突解決方法
- Android解決viewpager嵌套滑動(dòng)沖突并保留側(cè)滑菜單功能
- Android中RecycleView與ViewPager沖突的解決方法及原理
相關(guān)文章
Android多渠道打包時(shí)獲取當(dāng)前渠道的方法
這篇文章主要介紹了Android多渠道打包時(shí)獲取當(dāng)前渠道的方法,文中通過(guò)示例代碼介紹的非常詳細(xì),對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友們下面隨著小編來(lái)一起學(xué)習(xí)學(xué)習(xí)吧2020-01-01Android巧用ViewPager實(shí)現(xiàn)左右循環(huán)滑動(dòng)圖片
這篇文章主要為大家詳細(xì)介紹了Android巧用ViewPager實(shí)現(xiàn)左右循環(huán)滑動(dòng)圖片的相關(guān)資料,感興趣的小伙伴們可以參考一下2016-05-05Android之使用Android-query框架開(kāi)發(fā)實(shí)戰(zhàn)(二)
這篇文章主要介紹了Android之使用Android-query框架開(kāi)發(fā)實(shí)戰(zhàn)(二)的相關(guān)資料,需要的朋友可以參考下2015-10-10Android打印機(jī)--小票打印格式及模板設(shè)置實(shí)例代碼
這篇文章主要介紹了Android打印機(jī)--小票打印格式及模板設(shè)置實(shí)例代碼,具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下。2017-04-04Android使用WebSocket實(shí)現(xiàn)多人游戲
WebSocket 是 HTML5 一種新的協(xié)議。實(shí)現(xiàn)了瀏覽器與服務(wù)器全雙工通信,下面通過(guò)本文給大家分享Android使用WebSocket實(shí)現(xiàn)多人游戲,需要的朋友參考下吧2017-11-11Android 多種dialog的實(shí)現(xiàn)方法(推薦)
下面小編就為大家分享一篇Android 多種dialog的實(shí)現(xiàn)方法(推薦),具有很好的參考價(jià)值,希望對(duì)大家有所幫助。一起跟隨小編過(guò)來(lái)看看吧2018-01-01