Handler请求数据+PullToRefreshListView
package com.example.kanghuwei20181215.fragment;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.annotation.NonNull;import android.support.annot...
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package com.example.kanghuwei20181215.fragment;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import com.example.kanghuwei20181215.NetUtils;
import com.example.kanghuwei20181215.R;
import com.example.kanghuwei20181215.adapter.MyPullToRefresh;
import com.example.kanghuwei20181215.bean.ListBean;
import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.nostra13.universalimageloader.core.ImageLoader;
import java.util.ArrayList;
import java.util.List;
public class Frag_01 extends Fragment {
private String url = "http://api.tianapi.com/meinv/?key=3304a8bc9414f97e30928b80163cf098&num=10";
private PullToRefreshListView plv;
private ArrayList<ListBean.NewslistBean>list = new ArrayList<>();
private ImageLoader imageLoaderstance;
private MyPullToRefresh ptrfadapter;
private int page;
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
if (msg.what == 1){
String json =(String) msg.obj;
Gson gson = new Gson();
ListBean listBean = gson.fromJson(json, ListBean.class);
List<ListBean.NewslistBean> newslist = listBean.getNewslist();
list.addAll(newslist);
ptrfadapter.notifyDataSetChanged();
plv.onRefreshComplete();
}
}
};
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.frag_01,container,false);
plv = view.findViewById(R.id.plv);
imageLoaderstance = ImageLoader.getInstance();
ininData(page);
ptrfadapter = new MyPullToRefresh(list,getActivity(),imageLoaderstance);
plv.setAdapter(ptrfadapter);
plv.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
@Override
public void onPullDownToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
page = 0;
list.clear();
ininData(page);
}
@Override
public void onPullUpToRefresh(PullToRefreshBase<ListView> pullToRefreshBase) {
page++;
ininData(page);
}
});
plv.setMode(PullToRefreshBase.Mode.BOTH);
return view;
}
private void ininData(final int page){
new Thread(){
@Override
public void run() {
super.run();
String json = NetUtils.getJson(url+page);
Message message = handler.obtainMessage();
message.what = 1;
message.obj = json;
handler.sendMessage(message);
}
}.start();
}
}
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