package com.gs.gg.day8.back; import android.os.Bundle;import android.support.annotation.Nullable;import android.support.v7.app.AppCompatActivity; public abstract class BackActivity extends AppCompatActivity { @Override protected void onCreate(@Nullable Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  init(); }  protected abstract int getLayout(); protected abstract void initViews(); protected abstract void setOnClick(); protected abstract void processLogic(); void init(){  if (getLayout()!=0){   setContentView(getLayout());   initViews();   setOnClick();   processLogic();  }else {   throw new IllegalStateException("請加載布局文件");  } }}

package com.gs.gg.day8.model; import com.gs.gg.day8.callbase.MyCallBase; public interface Model { void getData(String mUrl,String parants,MyCallBase callBase);}

package com.gs.gg.day8.callbase; import com.gs.gg.day8.bean.User; public interface MyCallBase { void setData(User data); void setError(String error);}

package com.gs.gg.day8.model; import android.os.Handler;import android.os.Looper;import android.os.Message; import com.google.gson.Gson;import com.gs.gg.day8.R;import com.gs.gg.day8.bean.User;import com.gs.gg.day8.callbase.MyCallBase;import com.gs.gg.day8.util.HttpUtils; import java.net.URL; public class Modelimpl implements Model { private Handler handler=new Handler(){  @Override  public void handleMessage(Message msg) {   super.handleMessage(msg);   String JsonStr= (String) msg.obj;   Gson gson=new Gson();   User user= gson.fromJson(JsonStr,User.class);   callBase.setData(user);  } }; private MyCallBase callBase; @Override public void getData(final String mUrl, String parants, final MyCallBase callBase) {  this.callBase=callBase;  new Thread(new Runnable() {   @Override   public void run() {    try {     String json = HttpUtils.get(mUrl);     handler.sendMessage(handler.obtainMessage(0,json));    } catch (Exception e) {     Looper.prepare();     callBase.setError("異常");     Looper.loop();    }   }  }).start(); }}

package com.gs.gg.day8.util; import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL; public class HttpUtils { public static String get(String mUrl) throws Exception {  URL url=new URL(mUrl);  HttpURLConnection connection = (HttpURLConnection) url.openConnection();  //設置請求方式  connection.setRequestMethod("GET");  connection.setConnectTimeout(5000);  InputStream stream = connection.getInputStream();  String inputStr = getInputStr(stream);  return inputStr; }  //把流轉成字符串 private static String getInputStr(InputStream stream) throws IOException {  BufferedReader br = new BufferedReader(new InputStreamReader(stream));  StringBuffer sb = new StringBuffer();  String str = null;  while ((str = br.readLine()) != null) {   sb.append(str);  }  return sb.toString(); }}

package com.gs.gg.day8.view; import com.gs.gg.day8.bean.User; public interface IView { void success(User data); void error(String error);}

package com.gs.gg.day8.presenter; public interface Presenter { void startReponse(String url,String parants);}

package com.gs.gg.day8.presenter; import com.gs.gg.day8.bean.User;import com.gs.gg.day8.callbase.MyCallBase;import com.gs.gg.day8.model.Modelimpl;import com.gs.gg.day8.view.IView; public class PresenterImpl implements Presenter { private IView iView; private Modelimpl model;  public PresenterImpl(IView iView) {  this.iView = iView;  model = new Modelimpl(); }  @Override public void startReponse(String mUrl, String parants) {  model.getData(mUrl,parants, new MyCallBase() {   @Override   public void setData(User data) {    iView.success(data);   }    @Override   public void setError(String error) {    iView.error(error);   }  }); } public void onDotch(){  if (iView!=null){   iView=null;  }  if (model!=null){   model=null;  } }}

package com.gs.gg.day8; import android.widget.Toast; import com.gs.gg.day8.adapter.MyAdapter;import com.gs.gg.day8.back.BackActivity;import com.gs.gg.day8.bean.User;import com.gs.gg.day8.presenter.PresenterImpl;import com.gs.gg.day8.view.IView;import com.gs.gg.myxlist.me.maxwin.view.XListView; import java.util.ArrayList; public class MainActivity extends BackActivity implements IView,XListView.IXListViewListener {  private XListView xlist_item; private PresenterImpl presenter; private ArrayList<User.DataBean> mlist=new ArrayList<>(); private String muUrl="http://www.xieast.com/api/news/news.php?page="; private int i=1; private MyAdapter adapter;  @Override protected int getLayout() {  return R.layout.activity_main; }  @Override protected void initViews() {  xlist_item = findViewById(R.id.Xlist_item); }  @Override protected void setOnClick() {  xlist_item.setPullLoadEnable(true);  xlist_item.setXListViewListener(this); }  @Override protected void processLogic() {  presenter = new PresenterImpl(this);  adapter = new MyAdapter(MainActivity.this,mlist);  xlist_item.setAdapter(adapter);  presenter.startReponse(muUrl+i, null); }  @Override public void success(User data) {  mlist.addAll(data.getData());  adapter.notifyDataSetChanged();  stop(); }  @Override public void error(String error) {  Toast.makeText(this, "異常", Toast.LENGTH_SHORT).show(); } private void stop() {  xlist_item.stopRefresh();  xlist_item.stopLoadMore(); }  @Override public void onRefresh() {  i = 1;  mlist.clear();  presenter.startReponse(muUrl + i, null); }  @Override public void onLoadMore() {  i++;  presenter.startReponse(muUrl + i, null); }}

package com.gs.gg.day8.adapter; import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView; import com.gs.gg.day8.R;import com.gs.gg.day8.bean.User;import com.nostra13.universalimageloader.core.ImageLoader; import java.util.ArrayList; public class MyAdapter extends BaseAdapter { public MyAdapter(Context context, ArrayList<User.DataBean> mlist) {  this.context = context;  this.mlist = mlist; }  private Context context; private ArrayList<User.DataBean> mlist;  @Override public int getCount() {  return mlist.size(); }  @Override public Object getItem(int position) {  return mlist.get(position); }  @Override public long getItemId(int position) {  return position; }  @Override public View getView(int position, View convertView, ViewGroup parent) {  HolderView holder=null;  if (convertView==null){   convertView= View.inflate(context, R.layout.item,null);   holder=new HolderView();   holder.textName=convertView.findViewById(R.id.text);   holder.imageName=convertView.findViewById(R.id.image);   convertView.setTag(holder);  }else {   holder= (HolderView) convertView.getTag();  }  User.DataBean bean = mlist.get(position);  holder.textName.setText(bean.getTitle());  ImageLoader.getInstance().displayImage(mlist.get(position).getThumbnail_pic_s(),holder.imageName);  return convertView; } class HolderView{  TextView textName;  ImageView imageName; }}