/**
* 写xml文件到本地
*/
private void writeXmlToLocal() {
List<Person> personList = getPersonList();
// 获得序列化对象
XmlSerializer serializer = Xml.newSerializer();
try {
File path = new File(Environment.getExternalStorageDirectory(), "persons.xml");
FileOutputStream fos = new FileOutputStream(path);
// 指定序列化对象输出的位置和编码
serializer.setOutput(fos, "utf-8");
serializer.startDocument("utf-8", true); // 写开始 <?xml version='1.0' encoding='utf-8' standalone='yes' ?>
serializer.startTag(null, "persons"); // <persons>
for (Person person : personList) {
// 开始写人
serializer.startTag(null, "person"); // <person>
serializer.attribute(null, "id", String.valueOf(person.getId()));
// 写名字
serializer.startTag(null, "name"); // <name>
serializer.text(person.getName());
serializer.endTag(null, "name"); // </name>
// 写年龄
serializer.startTag(null, "age"); // <age>
serializer.text(String.valueOf(person.getAge()));
serializer.endTag(null, "age"); // </age>
serializer.endTag(null, "person"); // </person>
}
serializer.endTag(null, "persons"); // </persons>
serializer.endDocument(); // 结束
} catch (Exception e) {
e.printStackTrace();
}
}
private List<Person> getPersonList() {
List<Person> personList = new ArrayList<Person>();
for (int i = 0; i < 30; i++) {
personList.add(new Person(i, "wang" + i, 18 + i));
}
return personList;
}
private List<Person> parserXmlFromLocal() {
try {
File path = new File(Environment.getExternalStorageDirectory(), "persons.xml");
FileInputStream fis = new FileInputStream(path);
// 获得pull解析器对象
XmlPullParser parser = Xml.newPullParser();
// 指定解析的文件和编码格式
parser.setInput(fis, "utf-8");
int eventType = parser.getEventType(); // 获得事件类型
List<Person> personList = null;
Person person = null;
String id;
while(eventType != XmlPullParser.END_DOCUMENT) {
String tagName = parser.getName(); // 获得当前节点的名称
switch (eventType) {
case XmlPullParser.START_TAG: // 当前等于开始节点 <person>
if("persons".equals(tagName)) { // <persons>
personList = new ArrayList<Person>();
} else if("person".equals(tagName)) { // <person id="1">
person = new Person();
id = parser.getAttributeValue(null, "id");
person.setId(Integer.valueOf(id));
} else if("name".equals(tagName)) { // <name>
person.setName(parser.nextText());
} else if("age".equals(tagName)) { // <age>
person.setAge(Integer.parseInt(parser.nextText()));
}
break;
case XmlPullParser.END_TAG: // </persons>
if("person".equals(tagName)) {
// 需要把上面设置好值的person对象添加到集合中
personList.add(person);
}
break;
default:
break;
}
eventType = parser.next(); // 获得下一个事件类型
}
return personList;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public class TestCase extends AndroidTestCase {
public void test() {
// writeXmlToLocal();
List<Person> personList = parserXmlFromLocal();
for (Person person : personList) {
Log.i("TestCase", person.toString());
}
}
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://192.168.1.254:8080/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);
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;
}
}
}