PullToRefresh

来源：互联网发布：匿名聊天源码编辑：程序博客网时间：2024/05/17 10:03
<?xml version="1.0" encoding="utf-8"?><RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"    android:layout_height="match_parent" tools:context="com.example.day16_rk.MainActivity"    xmlns:ptr="http://schemas.android.com/apk/res-auto"    >    <com.handmark.pulltorefresh.library.PullToRefreshListView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:id="@+id/prf"        ptr:ptrDrawable="@drawable/default_ptr_flip"        ptr:ptrAnimationStyle="flip"        ptr:ptrHeaderBackground="#383838"        ptr:ptrHeaderTextColor="#FFFFFF" >    </com.handmark.pulltorefresh.library.PullToRefreshListView></RelativeLayout>//////////////////////////////////////////////////////////////////////////////////////////// package com.example.day16_rk;import android.os.Handler;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.widget.ListAdapter;import android.widget.ListView;import com.example.day16_rk.User.MyTask;import com.example.day16_rk.User.ToStrring;import com.example.day16_rk.bean.Bean;import com.google.gson.Gson;import com.handmark.pulltorefresh.library.ILoadingLayout;import com.handmark.pulltorefresh.library.PullToRefreshBase;import com.handmark.pulltorefresh.library.PullToRefreshListView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private PullToRefreshListView pullToRefreshListView;    private Handler myHandler=new Handler();    private MyAdapter adapter;    private List<String> list=new ArrayList<String>();    private List<Bean.NewslistBean> jihe=new ArrayList<Bean.NewslistBean>();    private int index=1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        pullToRefreshListView = (PullToRefreshListView) findViewById(R.id.prf);        init();        newData();    }    //上拉加载    private void addtoTop(){        index++;        MyTask task=new MyTask(new MyTask.Icallbacks() {            @Override            public void updateUiByjson(String jsonstr) {                Gson  gson=new Gson();                Bean bean=gson.fromJson(jsonstr,Bean.class);                jihe.addAll(0,bean.getNewslist());                setAdapter();            }        });        task.execute("https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page="+index);    }    private void addtoBottom(){        index++;        MyTask task=new MyTask(new MyTask.Icallbacks() {            @Override            public void updateUiByjson(String jsonstr) {                Gson  gson=new Gson();                Bean bean=gson.fromJson(jsonstr,Bean.class);                jihe.addAll(bean.getNewslist());                setAdapter();            }        });        task.execute("https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page="+index);    }    private void init() {//设置刷新模式 ，both代表支持上拉和下拉，pull_from_end代表上拉，pull_from_start代表下拉        pullToRefreshListView.setMode(PullToRefreshBase.Mode.BOTH);/*这里通过getLoadingLayoutProxy 方法来指定上拉和下拉时显示的状态的区别，第一个true 代表下来状态 ，第二个true 代表上拉的状态如果想区分上拉和下拉状态的不同，可以分别设置*/        ILoadingLayout startLabels = pullToRefreshListView.getLoadingLayoutProxy(true, false);        startLabels.setPullLabel("下拉刷新");        startLabels.setRefreshingLabel("正在拉");        startLabels.setReleaseLabel("放开刷新");        ILoadingLayout endLabels = pullToRefreshListView.getLoadingLayoutProxy(false, true);        endLabels.setPullLabel("上拉刷新");        endLabels.setRefreshingLabel("正在载入...");        endLabels.setReleaseLabel("放开刷新...");/*如果Mode设置成Mode.BOTH，需要设置刷新Listener为OnRefreshListener2，并实现onPullDownToRefresh()、onPullUpToRefresh()两个方法。  如果Mode设置成Mode.PULL_FROM_START或Mode.PULL_FROM_END，需要设置刷新Listener为OnRefreshListener，同时实现onRefresh()方法。  当然也可以设置为OnRefreshListener2，但是Mode.PULL_FROM_START的时候只调用onPullDownToRefresh()方法，Mode.PULL_FROM_END的时候只调用onPullUpToRefresh()方法.  加载数据完成后 必须 调用下 onRefreshComplete() 完成关闭 header,footer视图*/        pullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {            @Override            public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {//下拉刷新的回调                //下拉刷新的数据，显示在listview列表的最上面                addtoTop();                myHandler.postDelayed(new Runnable() {                    @Override                    public void run() {                        //刷新完成，必须在异步下完成                        pullToRefreshListView.onRefreshComplete();                        //刷新适配器                      setAdapter();                    }                },1000);            }            @Override            public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {//上拉加载的回调                //加载更多的数据，添加到集合列表的最后面               addtoBottom();                myHandler.postDelayed(new Runnable() {                    @Override                    public void run() {                        //刷新完成，必须在异步下完成                        pullToRefreshListView.onRefreshComplete();                        //刷新适配器                       setAdapter();                    }                },1000);            }        });    }    public void newData(){        MyTask task=new MyTask(new MyTask.Icallbacks() {            @Override            public void updateUiByjson(String jsonstr) {                Gson  gson=new Gson();                Bean bean=gson.fromJson(jsonstr,Bean.class);                Log.i("zza","1111111111"+bean.toString());                jihe.addAll(bean.getNewslist());                Log.i("zzb","222222222");             //不在上面调  setAdapter(); 大集合会为空   主线程里面含有子线程  主线程不会等子线程执行完才继续执行   而是直接走   让子线程自己执行              //在MyTask 中直接  调  适配器                setAdapter();            }        });        task.execute("https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10&page=1");        Log.i("zzc",jihe.toString());    }    private void setAdapter() {        if(adapter==null){            adapter=new MyAdapter(this,jihe);            pullToRefreshListView.setAdapter(adapter);        }else{            adapter.notifyDataSetChanged();        }    }}
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