HeaderRecycleAdapter/StickHeaderItemDecoration,头部加载Adapter及固定头部装...

package com.taro.headerrecycle.adapter; import android.support.annotation.NonNull; import android.support.v4.util.ArrayMap; import android.support.v7.widget.RecyclerView; import android.view.View; import android.view.ViewGroup; import com.taro.headerrecycle.stickerheader.StickHeaderItemDecoration; import com.taro.headerrecycle.layoutmanager.HeaderSpanSizeLookup; import java.util.AbstractMap; import java.util.LinkedList; import java.util.List; import java.util.Map; import java.util.Set; /** * Created by taro on 16/5/19. */ public class ExtraViewWrapAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements StickHeaderItemDecoration.IStickerHeaderDecoration, HeaderSpanSizeLookup.ISpanSizeHandler { public static final int VIEW_HEADER_REFRESH = Integer.MAX_VALUE / 3; public static final int VIEW_FOOTER_LOAD_MORE = Integer.MIN_VALUE / 3; private HeaderFooterViewCache mHeaderOption = null; private HeaderFooterViewCache mFooterOption = null; private StickHeaderItemDecoration.IStickerHeaderDecoration mIStickHeaderDecoration = null; private HeaderSpanSizeLookup.ISpanSizeHandler mISpanSizeLookup = null; private View mRefreshHeader = null; private View mLoadMoreFooter = null; private boolean mIsRefreshing = false; private boolean mIsLoading = false; private RecyclerView.Adapter mInnerAdapter; private boolean mIsFootViewEnable = true; private boolean mIsHeaderViewEnable = true; public static final void setRrefreshingViewStatus(boolean isRefreshing, boolean isScrollToStart, RecyclerView recyclerView) { if (recyclerView == null) { return; } else { RecyclerView.Adapter adapter = recyclerView.getAdapter(); if (adapter != null && adapter instanceof ExtraViewWrapAdapter) { ExtraViewWrapAdapter wrapAdapter = (ExtraViewWrapAdapter) adapter; wrapAdapter.setRefreshingStatus(isRefreshing); if (isScrollToStart) { recyclerView.scrollToPosition(0); } } } } public static final void setLoadingViewStatus(boolean isLoading, boolean isScrollToEnd, RecyclerView recyclerView) { if (recyclerView == null) { return; } else { RecyclerView.Adapter adapter = recyclerView.getAdapter(); if (adapter != null && adapter instanceof ExtraViewWrapAdapter) { ExtraViewWrapAdapter wrapAdapter = (ExtraViewWrapAdapter) adapter; wrapAdapter.setLoadingStatus(isLoading); if (isScrollToEnd) { recyclerView.scrollToPosition(wrapAdapter.getItemCount() - 1); } } } } public static final void setHeaderViewEnable(boolean isHeaderEnable, boolean isScrollToHeader, RecyclerView recycleView) { if (recycleView == null) { return; } else { RecyclerView.Adapter adapter = recycleView.getAdapter(); if (adapter != null && adapter instanceof ExtraViewWrapAdapter) { ExtraViewWrapAdapter wrapAdapter = (ExtraViewWrapAdapter) adapter; wrapAdapter.setHeaderViewEnable(isHeaderEnable); if (isScrollToHeader) { recycleView.scrollToPosition(0); } } } } public static final void setFooterViewEnable(boolean isFooterEnable, boolean isScrollToFooter, RecyclerView recyclerView) { if (recyclerView == null) { return; } else { RecyclerView.Adapter adapter = recyclerView.getAdapter(); if (adapter != null && adapter instanceof ExtraViewWrapAdapter) { ExtraViewWrapAdapter wrapAdapter = (ExtraViewWrapAdapter) adapter; wrapAdapter.setFootViewEnable(isFooterEnable); if (isScrollToFooter) { recyclerView.scrollToPosition(wrapAdapter.getItemCount() - 1); } } } } /** * 默认创建多头部/尾部包装类的adapter,头部/尾部都可显示 * * @param innerAdapter */ public ExtraViewWrapAdapter(@NonNull RecyclerView.Adapter innerAdapter) { this(innerAdapter, true, true); } /** * 创建多头部/尾部包装类的adapter,使用此adapter包装内部adapter时会改变内部adapter的某些操作,当不再需要时请使用{@link #unregisterInnerAdatperDataObserver()}还原内部adapter的操作 * * @param innerAdapter 内部引用的adapter,不可为null * @param isHeaderViewEnable 头部view是否可用 * @param isFootViewEnable 尾部view是否可用 */ public ExtraViewWrapAdapter(@NonNull RecyclerView.Adapter innerAdapter, boolean isHeaderViewEnable, boolean isFootViewEnable) { this.setInnerAdapter(innerAdapter); mIsHeaderViewEnable = isHeaderViewEnable; mIsFootViewEnable = isFootViewEnable; mHeaderOption = new HeaderFooterViewCache(); mFooterOption = new HeaderFooterViewCache(); mInnerAdapter.registerAdapterDataObserver(mDataObserver); } /** * 设置固定头部item渲染的接口回调 * * @param decoration 固定头部接口,用于回调判断当前项是否为头部/是否需要显示及绘制固定头部 */ public void setIStickHeaderItemDecoration(StickHeaderItemDecoration.IStickerHeaderDecoration decoration) { mIStickHeaderDecoration = decoration; } /** * 设置 gridLayoutManager 需要显示的spanSizeLookup * * @param spanSizeLookup 用于正确显示item占用的网格数 */ public void setISpanSizeLookup(HeaderSpanSizeLookup.ISpanSizeHandler spanSizeLookup) { mISpanSizeLookup = spanSizeLookup; } /** * 设置内置的innerAdapter,不可为null * * @param innerAdapter recycleView.Adapter,若该adapter已经实现了 {@link StickHeaderItemDecoration.IStickerHeaderDecoration}或者是{@link com.taro.headerrecycle.layoutmanager.HeaderSpanSizeLookup.ISpanSizeHandler} * 将直接引用此实例,不需要再重新设置一次两个接口 */ public void setInnerAdapter(@NonNull RecyclerView.Adapter innerAdapter) { mInnerAdapter = innerAdapter; if (mInnerAdapter != null && mInnerAdapter instanceof StickHeaderItemDecoration.IStickerHeaderDecoration) { mIStickHeaderDecoration = (StickHeaderItemDecoration.IStickerHeaderDecoration) mInnerAdapter; } if (mInnerAdapter != null && mInnerAdapter instanceof HeaderSpanSizeLookup.ISpanSizeHandler) { mISpanSizeLookup = (HeaderSpanSizeLookup.ISpanSizeHandler) mInnerAdapter; } } /** * 反注册内部innerAdapter的数据更新observer */ public void unregisterInnerAdatperDataObserver() { if (mInnerAdapter != null) { mInnerAdapter.unregisterAdapterDataObserver(mDataObserver); } } /** * 重新注册内部innerAdapter的数据更新observer */ public void reregisterInnerAdapterDataObserver() { if (mInnerAdapter != null) { mInnerAdapter.registerAdapterDataObserver(mDataObserver); } } /** * 获取当前WrapAdapter位置在InnerAdapter中对应的位置,即除去headerView及refreshView * * @param wrapAdapterPosition 当前WrapAdapter的位置 * @return */ public int getInnerAdapterPosition(int wrapAdapterPosition) { int refreshViewCount = getRefreshingViewCount(); int headerViewCount = getHeaderViewCount(); return wrapAdapterPosition - refreshViewCount - headerViewCount; } /** * 设置刷新头部view * * @param refreshingView */ public void setRefreshingHeaderView(View refreshingView) { mRefreshHeader = refreshingView; } /** * 设置加载尾部v