package com.tejia.lijin.app.ui.recommend;
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import android.content.Context;
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import androidx.recyclerview.widget.GridLayoutManager;
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import androidx.recyclerview.widget.RecyclerView;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.ImageView;
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import com.bumptech.glide.Glide;
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import com.nostra13.universalimageloader.core.DisplayImageOptions;
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import com.nostra13.universalimageloader.core.assist.ImageScaleType;
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import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;
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import com.tejia.lijin.app.R;
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import com.tejia.lijin.app.entity.SpecialOffer2;
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import java.util.List;
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/**
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* Created by weikou2015 on 2017/12/5.
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*/
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public class RecommendImgAdapter2 extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
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private RecyclerView mRecyclerView;
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private List<SpecialOffer2> mList;
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private Context mContext;
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private View VIEW_FOOTER;
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private View VIEW_HEADER;
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//Type
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private int TYPE_HEADER = 1001;
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private int TYPE_FOOTER = 1002;
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private int TYPE_SIMPLE_IMG = 1004;
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private DisplayImageOptions options;
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public RecommendImgAdapter2(Context context, List<SpecialOffer2> list) {
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this.mList = list;
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this.mContext = context;
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this.options = new DisplayImageOptions.Builder()
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.showImageForEmptyUri(R.drawable.ic_goods_default)
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.showImageOnFail(R.drawable.ic_goods_default)
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.showImageOnLoading(R.drawable.ic_goods_default)
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.resetViewBeforeLoading(true).cacheInMemory(true)
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.cacheOnDisk(true).imageScaleType(ImageScaleType.EXACTLY)
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.considerExifParams(true)
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.displayer(new FadeInBitmapDisplayer(300)).build();
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}
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@Override
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public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
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if (viewType == TYPE_FOOTER) {
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return new MyHolder(VIEW_FOOTER);
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} else if (viewType == TYPE_HEADER) {
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return new MyHolder(VIEW_HEADER);
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} else {
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View view = LayoutInflater.from(mContext).inflate(R.layout.item_recommend_activity, parent, false);
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MyHolder holder = new MyHolder(view);
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return holder;
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}
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}
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@Override
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public void onBindViewHolder(RecyclerView.ViewHolder cHolder, int position) {
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MyHolder holder = (MyHolder) cHolder;
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if (!isHeaderView(position) && !isFooterView(position)) {
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SpecialOffer2 info;
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if (haveHeaderView()) {
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info = mList.get(position - 1);
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} else if (haveFooterView() && ((haveHeaderView() && position == mList.size() + 1) ||
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!haveHeaderView() && position == mList.size())) {
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return;
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} else {
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info = mList.get(position);
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}
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Glide.with(mContext).load(info.getPicture()).into(holder.iv_activity);
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}
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}
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@Override
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public int getItemCount() {
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int count = (mList == null ? 0 : mList.size());
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if (VIEW_FOOTER != null) {
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count++;
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}
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if (VIEW_HEADER != null) {
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count++;
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}
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return count;
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}
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@Override
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public int getItemViewType(int position) {
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if (isHeaderView(position)) {
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return TYPE_HEADER;
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} else if (isFooterView(position)) {
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return TYPE_FOOTER;
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} else {
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return TYPE_SIMPLE_IMG;
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}
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}
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@Override
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public void onAttachedToRecyclerView(RecyclerView recyclerView) {
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try {
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if (mRecyclerView == null && mRecyclerView != recyclerView) {
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mRecyclerView = recyclerView;
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}
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ifGridLayoutManager();
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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private View getLayout(int layoutId) {
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return LayoutInflater.from(mContext).inflate(layoutId, null);
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}
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public void addHeaderView(View headerView) {
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if (haveHeaderView()) {
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throw new IllegalStateException("hearview has already exists!");
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} else {
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//避免出现宽度自适应
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ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
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headerView.setLayoutParams(params);
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VIEW_HEADER = headerView;
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ifGridLayoutManager();
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notifyItemInserted(0);
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}
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}
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public void addFooterView(View footerView) {
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if (haveFooterView()) {
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throw new IllegalStateException("footerView has already exists!");
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} else {
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ViewGroup.LayoutParams params = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
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footerView.setLayoutParams(params);
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VIEW_FOOTER = footerView;
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ifGridLayoutManager();
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notifyItemInserted(getItemCount() - 1);
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}
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}
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private void ifGridLayoutManager() {
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if (mRecyclerView == null) return;
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final RecyclerView.LayoutManager layoutManager = mRecyclerView.getLayoutManager();
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if (layoutManager instanceof GridLayoutManager) {
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((GridLayoutManager) layoutManager).setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
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@Override
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public int getSpanSize(int position) {
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if (isHeaderView(position) || isFooterView(position)) {
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return ((GridLayoutManager) layoutManager).getSpanCount();
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} else if (position <= 1) {
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return ((GridLayoutManager) layoutManager).getSpanCount() / 2;
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} else {
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return ((GridLayoutManager) layoutManager).getSpanCount() / 3;
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}
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}
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});
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}
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}
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private boolean haveHeaderView() {
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return VIEW_HEADER != null;
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}
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public boolean haveFooterView() {
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return VIEW_FOOTER != null;
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}
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private boolean isHeaderView(int position) {
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return haveHeaderView() && position == 0;
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}
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private boolean isFooterView(int position) {
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return haveFooterView() && position >= getItemCount() - 1;
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}
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public class MyHolder extends RecyclerView.ViewHolder {
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ImageView iv_activity;
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public MyHolder(View view) {
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super(view);
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iv_activity = view.findViewById(R.id.iv_activity);
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}
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}
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}
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