package com.itheima28.neteasedemo; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.xmlpull.v1.XmlPullParser; import com.itheima28.neteasedemo.domain.NewInfo; import com.loopj.android.image.SmartImageView; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.app.Activity; import android.util.Log; import android.util.Xml; import android.view.LayoutInflater; import android.view.Menu; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity { private static final String TAG = "MainActivity"; private final int SUCCESS = 0; private final int FAILED = 1; private ListView lvNews; private List<NewInfo> newInfoList; private Handler handler = new Handler() { /** * 接收消息 */ @Override public void handleMessage(Message msg) { switch (msg.what) { case SUCCESS: // 访问成功, 有数据 // 给Listview列表绑定数据 newInfoList = (List<NewInfo>) msg.obj; MyAdapter adapter = new MyAdapter(); lvNews.setAdapter(adapter); break; case FAILED: // 无数据 Toast.makeText(MainActivity.this, "当前网络崩溃了.", 0).show(); break; default: break; } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); init(); } private void init() { lvNews = (ListView) findViewById(R.id.lv_news); // 抓取新闻数据 new Thread(new Runnable() { @Override public void run() { // 获得新闻集合 List<NewInfo> newInfoList = getNewsFromInternet(); Message msg = new Message(); if(newInfoList != null) { msg.what = SUCCESS; msg.obj = newInfoList; } else { msg.what = FAILED; } handler.sendMessage(msg); } }).start(); } /** * 返回新闻信息 */ private List<NewInfo> getNewsFromInternet() { HttpClient client = null; try { // 定义一个客户端 client = new DefaultHttpClient(); // 定义get方法 HttpGet get = new HttpGet("http://192.168.31.155:8080/NetEaseServer/new.xml"); // 执行请求 HttpResponse response = client.execute(get); int statusCode = response.getStatusLine().getStatusCode(); if(statusCode == 200) { InputStream is = response.getEntity().getContent(); List<NewInfo> newInfoList = getNewListFromInputStream(is); return newInfoList; } else { Log.i(TAG, "访问失败: " + statusCode); } } catch (Exception e) { e.printStackTrace(); } finally { if(client != null) { client.getConnectionManager().shutdown(); // 关闭和释放资源 } } return null; } /** * 从流中解析新闻集合 * @param is * @return */ private List<NewInfo> getNewListFromInputStream(InputStream is) throws Exception { XmlPullParser parser = Xml.newPullParser(); // 创建一个pull解析器 parser.setInput(is, "utf-8"); // 指定解析流, 和编码 int eventType = parser.getEventType(); List<NewInfo> newInfoList = null; NewInfo newInfo = null; while(eventType != XmlPullParser.END_DOCUMENT) { // 如果没有到结尾处, 继续循环 String tagName = parser.getName(); // 节点名称 switch (eventType) { case XmlPullParser.START_TAG: // <news> if("news".equals(tagName)) { newInfoList = new ArrayList<NewInfo>(); } else if("new".equals(tagName)) { newInfo = new NewInfo(); } else if("title".equals(tagName)) { newInfo.setTitle(parser.nextText()); } else if("detail".equals(tagName)) { newInfo.setDetail(parser.nextText()); } else if("comment".equals(tagName)) { newInfo.setComment(Integer.valueOf(parser.nextText())); } else if("image".equals(tagName)) { newInfo.setImageUrl(parser.nextText()); } break; case XmlPullParser.END_TAG: // </news> if("new".equals(tagName)) { newInfoList.add(newInfo); } break; default: break; } eventType = parser.next(); // 取下一个事件类型 } return newInfoList; } class MyAdapter extends BaseAdapter { /** * 返回列表的总长度 */ @Override public int getCount() { return newInfoList.size(); } /** * 返回一个列表的子条目的布局 */ @Override public View getView(int position, View convertView, ViewGroup parent) { View view = null; if(convertView == null) { LayoutInflater inflater = getLayoutInflater(); view = inflater.inflate(R.layout.listview_item, null); } else { view = convertView; } // 重新赋值, 不会产生缓存对象中原有数据保留的现象 SmartImageView sivIcon = (SmartImageView) view.findViewById(R.id.siv_listview_item_icon); TextView tvTitle = (TextView) view.findViewById(R.id.tv_listview_item_title); TextView tvDetail = (TextView) view.findViewById(R.id.tv_listview_item_detail); TextView tvComment = (TextView) view.findViewById(R.id.tv_listview_item_comment); NewInfo newInfo = newInfoList.get(position); System.out.println(newInfo.getImageUrl()); sivIcon.setImageUrl(newInfo.getImageUrl()); // 设置图片 tvTitle.setText(newInfo.getTitle()); tvDetail.setText(newInfo.getDetail()); tvComment.setText(newInfo.getComment() + "跟帖"); return view; } @Override public Object getItem(int position) { // TODO Auto-generated method stub return null; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return 0; } } }