recyclerView多条目展示,ArgbEvaluator颜色渐变

来源：互联网发布：李明linux 编辑：程序博客网时间：2024/06/10 15:38

效果图

adapter

package com.example.liuan.takeout.ui.adapter;import android.app.Activity;import android.support.v7.widget.RecyclerView;import android.view.View;import android.view.ViewGroup;import android.widget.RatingBar;import android.widget.TextView;import com.daimajia.slider.library.Animations.DescriptionAnimation;import com.daimajia.slider.library.SliderLayout;import com.daimajia.slider.library.SliderTypes.BaseSliderView;import com.daimajia.slider.library.SliderTypes.TextSliderView;import com.example.liuan.takeout.R;import com.example.liuan.takeout.model.bean.HomeInfo;import com.example.liuan.takeout.model.bean.Promotion;import butterknife.Bind;import butterknife.ButterKnife;/** * Name: HomeAdapter * Action: * Author: liuan * creatTime:2017-02-05 10:39 */public class HomeAdapter extends RecyclerView.Adapter {    private static final int ITEM_HEADER = 0;//最上面    private static final int ITEM_SELLER = 1;//一般商家    private static final int ITEM_DIV = 2;//分割线    private Activity activity;    private HomeInfo data;    public HomeAdapter(Activity activity) {        this.activity = activity;    }    @Override    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        //返回包含的view的VIewHolder        //viewType就是在getItemViewType（position）返回状态码中的某一个        switch (viewType) {            case ITEM_HEADER:                //准备view 上下文也能用activity                View view = View.inflate(parent.getContext(), R.layout.item_title, null);                HeaderHolder headerHolder = new HeaderHolder(view);                return headerHolder;            case ITEM_SELLER:                View view2 = View.inflate(parent.getContext(), R.layout.item_seller, null);                SellerHolder sellerHolder = new SellerHolder(view2);                return sellerHolder;            case ITEM_DIV:                View view3 = View.inflate(parent.getContext(), R.layout.item_division, null);                DivHolder divHolder = new DivHolder(view3);                return divHolder;        }        return null;    }    //给ViewHolder绑定数据    @Override    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {//        if(holder instanceof  SellerHolder){}//        if(holder instanceof  SellerHolder){}//        if(holder instanceof  SellerHolder){}        if (position == 0) {        } else if (data.getBody().get(position - 1).type == 0) {            //商家            setSellerHolderDataHolderData(holder, position - 1);        } else {            //分割线条目            //给divHolder中的多个TextViee赋值            setDIVHolderData(holder, position - 1);        }    }    private void setSellerHolderDataHolderData(RecyclerView.ViewHolder holder, int position) {        ((SellerHolder) holder).tvTitle.setText(data.getBody().get(position).getSeller().getName());        ((SellerHolder) holder).tvCount.setText(data.getBody().get(position).getSeller().getScore());        ((SellerHolder) holder).ratingBar.setNumStars(5);    }    private void setDIVHolderData(RecyclerView.ViewHolder holder, int position) {        ((DivHolder) holder).tv1.setText(data.getBody().get(position).getRecommendInfos().get(0));        ((DivHolder) holder).tv2.setText(data.getBody().get(position).getRecommendInfos().get(1));        ((DivHolder) holder).tv3.setText(data.getBody().get(position).getRecommendInfos().get(2));        ((DivHolder) holder).tv4.setText(data.getBody().get(position).getRecommendInfos().get(3));        ((DivHolder) holder).tv5.setText(data.getBody().get(position).getRecommendInfos().get(4));        ((DivHolder) holder).tv6.setText(data.getBody().get(position).getRecommendInfos().get(5));    }    //多条目展示需要使用此方法    @Override    public int getItemViewType(int position) {        //索引位置为0的时候 header条目        //服务器端传递type为1 的时候 分割线条目        //服务器端传递type为0 的时候 一般商家条目        if (position == 0) {            return ITEM_HEADER;        } else if (data.getBody().get(position - 1).type == 0) {            return ITEM_SELLER;        } else {            return ITEM_DIV;        }    }    @Override    public int getItemCount() {        if (data != null && data.getBody() != null && data.getHead() != null && data.getBody().size() > 0) {            return data.getBody().size() + 1;        }        return 0;    }    public void setData(HomeInfo data) {        this.data = data;        notifyDataSetChanged();    }    class HeaderHolder extends RecyclerView.ViewHolder {        //在创建holder的时候 必须传递一个view对象 就是一个条目的布局转换成view对象        @Bind(R.id.slider)        SliderLayout slider;        public HeaderHolder(View itemView) {            super(itemView);            ButterKnife.bind(this, itemView);            //data对象header里面            int picCount = data.getHead().getPromotionList().size();            for (int i = 0; i < picCount; i++) {                //显示图片和描述文本的控件                TextSliderView textSliderView = new TextSliderView(activity);                Promotion promotion = data.getHead().getPromotionList().get(i);                //指定了描述文本                textSliderView.description(promotion.getInfo())                        //图片连接地址                        .image(promotion.getPic())                        //图片展示方式                        .setScaleType(BaseSliderView.ScaleType.Fit);                //将textSliderView加进去                slider.addSlider(textSliderView);                //动画类型            }            slider.setPresetTransformer(SliderLayout.Transformer.RotateDown);            //可以设置轮播容器内部点所在位置            slider.setPresetIndicator(SliderLayout.PresetIndicators.Center_Bottom);            //文本描述出现的时候 指定的动画            slider.setCustomAnimation(new DescriptionAnimation());            slider.setDuration(4000);        }    }    class SellerHolder extends RecyclerView.ViewHolder {        @Bind(R.id.tvCount)        TextView tvCount;        @Bind(R.id.tv_title)        TextView tvTitle;        @Bind(R.id.ratingBar)        RatingBar ratingBar;        //在创建holder的时候 必须传递一个view对象 就是一个条目的布局转换成view对象        public SellerHolder(View itemView) {            super(itemView);            ButterKnife.bind(this, itemView);        }    }    class DivHolder extends RecyclerView.ViewHolder {        @Bind(R.id.tv_division_title)        TextView tvDivisionTitle;        @Bind(R.id.tv1)        TextView tv1;        @Bind(R.id.tv2)        TextView tv2;        @Bind(R.id.tv3)        TextView tv3;        @Bind(R.id.tv4)        TextView tv4;        @Bind(R.id.tv5)        TextView tv5;        @Bind(R.id.tv6)        TextView tv6;        //在创建holder的时候 必须传递一个view对象 就是一个条目的布局转换成view对象        public DivHolder(View itemView) {            super(itemView);            ButterKnife.bind(this, itemView);        }    }}

HomeFragment

package com.example.liuan.takeout.ui.fragment;import android.animation.ArgbEvaluator;import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.LinearLayout;import android.widget.TextView;import com.example.liuan.takeout.R;import com.example.liuan.takeout.presenter.net.HomePresenter;import com.example.liuan.takeout.ui.adapter.HomeAdapter;import butterknife.Bind;import butterknife.ButterKnife;/** * Name: HomeFragment * Action: * Author: liuan * creatTime:2017-02-05 09:42 */public class HomeFragment extends BaseFragment {    @Bind(R.id.rv_home)    RecyclerView rvHome;    @Bind(R.id.home_tv_address)    TextView homeTvAddress;    @Bind(R.id.ll_title_search)    LinearLayout llTitleSearch;    @Bind(R.id.ll_title_container)    LinearLayout llTitleContainer;    private HomeAdapter homeAdapter;   private ArgbEvaluator argbEvaluator=new ArgbEvaluator();    private int sumY=0;    //开始颜色    //结束颜色    //渐变规则    @Nullable    @Override    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {        View view = View.inflate(getActivity(), R.layout.fragment_home, null);        ButterKnife.bind(this, view);        return view;    }    @Override    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {        sumY=0;        homeAdapter = new HomeAdapter(getActivity());        //设置recyclerVIew模式方向 列表 竖直        rvHome.setLayoutManager(new LinearLayoutManager(getActivity(),LinearLayoutManager.VERTICAL,false));        rvHome.setAdapter(homeAdapter);        HomePresenter homePresenter = new HomePresenter(homeAdapter);        homePresenter.getHomeData("","");        rvHome.addOnScrollListener(new RecyclerView.OnScrollListener() {            //滚动状态发生改变            @Override            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {                super.onScrollStateChanged(recyclerView, newState);            }           //滚动过程中 需要修改顶部悬浮title颜色            @Override            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {                        sumY+=dy;                //开始颜色                int bgColor=0X553190E8;                if(sumY<=0){                    //开始颜色                    bgColor=0X553190E8;                }else if(sumY>=300){                    // 终点颜色                    bgColor=0XFF3190E8;                }else{                    //渐变逻辑                 //颜色变化                    //渐变规则                    bgColor = (int) argbEvaluator.evaluate(sumY / 300.0f, 0X553190E8, 0XFF3190E8);                }                llTitleContainer.setBackgroundColor(bgColor);            }        });        super.onViewCreated(view, savedInstanceState);    }    @Override    public void onDestroyView() {        super.onDestroyView();        ButterKnife.unbind(this);    }}

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