上下拉刷新
来源：互联网 发布：最新网络歌曲打包下载 编辑：程序博客网 时间：2024/04/28 09:39
主类
package com.mydemo;import android.support.v4.widget.SwipeRefreshLayout;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import com.mydemo.utils.GsonObjectCallback;import com.mydemo.utils.OkHttp3Utils;import java.io.IOException;import java.util.List;import okhttp3.Call;public class MainActivity extends AppCompatActivity { RecyclerView rc; SwipeRefreshLayout swf; LinearLayoutManager layoutManager; MyNewAdapter adapter; String url="http://news-at.zhihu.com/api/4/news/latest"; String urlMore="http://news-at.zhihu.com/api/4/news/before/20131119"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); rc= (RecyclerView) findViewById(R.id.rc); swf= (SwipeRefreshLayout) findViewById(R.id.swf); layoutManager = new LinearLayoutManager(MainActivity.this); rc.setLayoutManager(layoutManager); getServerData(); swf.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { OkHttp3Utils.doGet(urlMore, new GsonObjectCallback<NewsBean>() { @Override public void onUi(NewsBean newsBean) { List<NewsBean.StoriesBean> stories = newsBean.getStories(); adapter.refreshMore(stories); } @Override public void onFailed(Call call, IOException e) { } }); if(swf.isRefreshing()){ //隐藏掉下拉刷新进度条 swf.setRefreshing(false); } } });//给RecycleView天机滚动监听 rc.addOnScrollListener(new RecyclerView.OnScrollListener(){ private int lastPOsition; @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { super.onScrollStateChanged(recyclerView, newState); if(lastPOsition+1==adapter.getItemCount()&&newState==RecyclerView.SCROLL_STATE_IDLE){ OkHttp3Utils.doGet(urlMore, new GsonObjectCallback<NewsBean>() { @Override public void onUi(NewsBean newsBean) { List<NewsBean.StoriesBean> stories = newsBean.getStories(); adapter.loadMore(stories); } @Override public void onFailed(Call call, IOException e) { } }); } } @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); lastPOsition = layoutManager.findLastVisibleItemPosition(); } }); } private void getServerData() { OkHttp3Utils.doGet(url, new GsonObjectCallback<NewsBean>() { @Override public void onUi(NewsBean newsBean) { if(adapter==null){ List<NewsBean.TopStoriesBean> top_stories = newsBean.getTop_stories(); adapter = new MyNewAdapter(MainActivity.this,newsBean,top_stories); rc.setAdapter(adapter); }else{ adapter.notifyDataSetChanged(); } } @Override public void onFailed(Call call, IOException e) { } }); }}
适配器----------------------------------------------------------------
package com.mydemo;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.TextView;import java.util.List;public class MyNewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder>{ List<NewsBean.TopStoriesBean> top_stories; Context context; NewsBean newsBean; List<NewsBean.StoriesBean> stories; public MyNewAdapter(Context context, NewsBean newsBean, List<NewsBean.TopStoriesBean> top_stories) { this.context = context; this.newsBean = newsBean; this.top_stories=top_stories; } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { if(viewType==0){ View view = LayoutInflater.from(context).inflate(R.layout.footer_item, parent, false); return new VHFooter(view); }else{ View view = LayoutInflater.from(context).inflate(R.layout.item, parent, false); return new Content(view); } } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { int type = getItemViewType(position); if(type==0){ return; } if(type==1) { Content content=new Content(holder.itemView); stories = newsBean.getStories(); content.tv_newTitle.setText(stories.get(position).getTitle()); content.tv_newTime.setText(stories.get(position).getGa_prefix()); } } @Override public int getItemCount() { return newsBean.getStories().size()+1; } @Override public int getItemViewType(int position) { if(position==getItemCount()-1){ return 0; }else { return 1; } } private class Content extends RecyclerView.ViewHolder{ private final ImageView iv_new; private final TextView tv_newTitle; private final TextView tv_newTime; public Content(View itemView) { super(itemView); iv_new = (ImageView) itemView.findViewById(R.id.iv_new); tv_newTitle = (TextView) itemView.findViewById(R.id.tv_newTitle); tv_newTime = (TextView) itemView.findViewById(R.id.tv_NewTime); } } private class VHFooter extends RecyclerView.ViewHolder{ public VHFooter(View itemView) { super(itemView); } } public void loadMore(List<NewsBean.StoriesBean> s ){ for (NewsBean.StoriesBean str : s){ stories.add(str); } //更新界面 notifyDataSetChanged(); } public void refreshMore(List<NewsBean.StoriesBean> s){ for (NewsBean.StoriesBean str : s){ stories.add(0,str); } //更新界面 notifyDataSetChanged(); }}bean类参考package com.mydemo;import java.util.List;public class NewsBean { /** * date : 20171025 * stories : [{"title":"装修不要电视墙、吊顶、壁纸，咦，怎么好像廉价出租屋？","ga_prefix":"102519","images":["https://pic4.zhimg.com/v2-20e7b66c633a90d49a048b4453a591af.jpg"],"multipic":true,"type":0,"id":9653932},{"images":["https://pic1.zhimg.com/v2-08f97fddae1aa35993d4dfb14ea31054.jpg"],"type":0,"id":9653750,"ga_prefix":"102518","title":"为什么很多女生会喜欢听甜言蜜语？"},{"images":["https://pic1.zhimg.com/v2-b4747aa8b8e4f5d9af2115430862b9f0.jpg"],"type":0,"id":9653557,"ga_prefix":"102517","title":"郭襄寻不到杨过出家为尼，为何不回到家人身边抵抗敌人同生共死？"},{"images":["https://pic2.zhimg.com/v2-4f639930a1cf7e6e2f530343cfacb439.jpg"],"type":0,"id":9653800,"ga_prefix":"102516","title":"你想当一个活着的怪物，还是做一个死去的好人？"},{"images":["https://pic2.zhimg.com/v2-3af4452834bd47d965de04e32b056fe9.jpg"],"type":0,"id":9653394,"ga_prefix":"102515","title":"如今「坏人」已经可以列出 18 种，他们擅长的东西你都不要信"},{"images":["https://pic3.zhimg.com/v2-7b58d1a1a38b6302d76d2698b0a08d8a.jpg"],"type":0,"id":9653576,"ga_prefix":"102514","title":"把树抱住后使劲摇摇摇\u2026\u2026你看人家这摘果子的方法清奇的"},{"images":["https://pic1.zhimg.com/v2-714718adf58cc1a111c422d2514e2354.jpg"],"type":0,"id":9653776,"ga_prefix":"102513","title":"记住这些知识点，去日本迷失在车站里也能会心一笑"},{"images":["https://pic2.zhimg.com/v2-36c115eaf6a006719f71a94cd2993f59.jpg"],"type":0,"id":9653346,"ga_prefix":"102512","title":"大误 · 让地球从内到外冷下来"},{"images":["https://pic3.zhimg.com/v2-c98d605967a61c53abd811e683e62dde.jpg"],"type":0,"id":9653785,"ga_prefix":"102511","title":"歌手是怎么创作歌曲的？"},{"images":["https://pic3.zhimg.com/v2-ed8af5cd65b6bca6c9b4966b05e1b72a.jpg"],"type":0,"id":9653414,"ga_prefix":"102510","title":"虽说「人心狠毒」，为什么很少见到真正有毒的哺乳动物？"},{"images":["https://pic4.zhimg.com/v2-c48d2c752ec7b8b183055667b76596c7.jpg"],"type":0,"id":9653540,"ga_prefix":"102509","title":"没和身边人一起进大律所，可后来，我却学得比他们多"},{"images":["https://pic3.zhimg.com/v2-8d3803d6014153f1aa9835b47ccd7db2.jpg"],"type":0,"id":9653658,"ga_prefix":"102508","title":"没有「爆裂脑花」、细思 bug 极多\u2026\u2026唯一的亮点只剩特工代号"},{"images":["https://pic3.zhimg.com/v2-8569d560d951c65cc1c712b8976c8fba.jpg"],"type":0,"id":9653620,"ga_prefix":"102507","title":"身为杂食性动物的两脚兽，我们要吃蔬菜水果，喵汪星人呢？"},{"images":["https://pic2.zhimg.com/v2-340313b0e29d374f9a7fbe3cb45483e1.jpg"],"type":0,"id":9653718,"ga_prefix":"102507","title":"姚老板的球队能卖多少钱，起决定作用的是他另一个身份"},{"images":["https://pic3.zhimg.com/v2-d839d13157eb525ed60c34e39fee4d1a.jpg"],"type":0,"id":9653251,"ga_prefix":"102507","title":"《天才枪手》式的造富神话：非典型批片、中国采购团和弯道超车梦"},{"images":["https://pic1.zhimg.com/v2-ea05acac99ff29b8d1b60de506dbcfe4.jpg"],"type":0,"id":9653582,"ga_prefix":"102506","title":"瞎扯 · 如何正确地吐槽"}] * top_stories : [{"image":"https://pic3.zhimg.com/v2-20786b64172211a00c6e611b1bfbb2b6.jpg","type":0,"id":9653557,"ga_prefix":"102517","title":"郭襄寻不到杨过出家为尼，为何不回到家人身边抵抗敌人同生共死？"},{"image":"https://pic4.zhimg.com/v2-97d9c4d8c3c673b10772682e5ac0c137.jpg","type":0,"id":9653785,"ga_prefix":"102511","title":"歌手是怎么创作歌曲的？"},{"image":"https://pic2.zhimg.com/v2-e7582788c34b9d40b7b849ea3458d0dd.jpg","type":0,"id":9653718,"ga_prefix":"102507","title":"姚老板的球队能卖多少钱，起决定作用的是他另一个身份"},{"image":"https://pic1.zhimg.com/v2-e5b5e2342378517d1ddeb3f26496367c.jpg","type":0,"id":9653251,"ga_prefix":"102507","title":"《天才枪手》式的造富神话：非典型批片、中国采购团和弯道超车梦"},{"image":"https://pic2.zhimg.com/v2-2f8827e1dd120aecea73713fd27f67d1.jpg","type":0,"id":9653576,"ga_prefix":"102514","title":"把树抱住后使劲摇摇摇\u2026\u2026你看人家这摘果子的方法清奇的"}] */ private String date; private List<StoriesBean> stories; private List<TopStoriesBean> top_stories; public String getDate() { return date; } public void setDate(String date) { this.date = date; } public List<StoriesBean> getStories() { return stories; } public void setStories(List<StoriesBean> stories) { this.stories = stories; } public List<TopStoriesBean> getTop_stories() { return top_stories; } public void setTop_stories(List<TopStoriesBean> top_stories) { this.top_stories = top_stories; } public static class StoriesBean { /** * title : 装修不要电视墙、吊顶、壁纸，咦，怎么好像廉价出租屋？ * ga_prefix : 102519 * images : ["https://pic4.zhimg.com/v2-20e7b66c633a90d49a048b4453a591af.jpg"] * multipic : true * type : 0 * id : 9653932 */ private String title; private String ga_prefix; private boolean multipic; private int type; private int id; private List<String> images; public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getGa_prefix() { return ga_prefix; } public void setGa_prefix(String ga_prefix) { this.ga_prefix = ga_prefix; } public boolean isMultipic() { return multipic; } public void setMultipic(boolean multipic) { this.multipic = multipic; } public int getType() { return type; } public void setType(int type) { this.type = type; } public int getId() { return id; } public void setId(int id) { this.id = id; } public List<String> getImages() { return images; } public void setImages(List<String> images) { this.images = images; } } public static class TopStoriesBean { /** * image : https://pic3.zhimg.com/v2-20786b64172211a00c6e611b1bfbb2b6.jpg * type : 0 * id : 9653557 * ga_prefix : 102517 * title : 郭襄寻不到杨过出家为尼，为何不回到家人身边抵抗敌人同生共死？ */ private String image; private int type; private int id; private String ga_prefix; private String title; public String getImage() { return image; } public void setImage(String image) { this.image = image; } public int getType() { return type; } public void setType(int type) { this.type = type; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getGa_prefix() { return ga_prefix; } public void setGa_prefix(String ga_prefix) { this.ga_prefix = ga_prefix; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } }}
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