Android解析XML(PULL)展示到ListView

下面是详细讲解“Android解析XML(PULL)展示到ListView”的完整攻略：

一、PULL解析XML

PULL是一种常用的解析XML文件的方式，它的优点是速度快，内存占用少，应用广泛，下面是使用PULL解析XML文件的步骤：

1. 获取XmlPullParser对象

   XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
   XmlPullParser parser = factory.newPullParser();

2. 设置输入流和编码方式

   parser.setInput(inputstream, "UTF-8");

3. 获取节点事件类型并循环解析

java
//定义一个List用来保存xml数据
List<SomeModel> dataList = new ArrayList<SomeModel>();
SomeModel data;
int eventType = parser.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
String nodeName = parser.getName();
switch (eventType) {
case XmlPullParser.START_TAG:
//解析节点，每个节点的解析方式不同，需要根据具体情况处理
if ("node_name".equals(nodeName)) {
data = new SomeModel();
data.setId(Integer.parseInt(parser.getAttributeValue(null, "id")));
data.setName(parser.getAttributeValue(null, "name"));
dataList.add(data);
}
break;
case XmlPullParser.END_TAG:
break;
default:
break;
}
eventType = parser.next();
}
//解析完成，返回数据
return dataList;

二、把解析好的数据展示到ListView上

实现把解析好的数据展示到ListView上，需要分别实现ListView的Adapter和Item布局文件，具体步骤如下：

1. 实现Item布局文件

   xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="@+id/tv_id"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"/>
<TextView
android:id="@+id/tv_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"/>
</LinearLayout>

2. 实现ListView的Adapter

   ```java
   public class MyAdapter extends BaseAdapter {
   private List mDataList;
   private Context mContext;

   public MyAdapter(List<SomeModel> dataList, Context context) {
       this.mDataList = dataList;
       this.mContext = context;
   }
   
   @Override
   public int getCount() {
       return mDataList.size();
   }
   
   @Override
   public Object getItem(int position) {
       return mDataList.get(position);
   }
   
   @Override
   public long getItemId(int position) {
       return position;
   }
   
   @Override
   public View getView(int position, View convertView, ViewGroup parent) {
       ViewHolder holder;
       if (convertView == null) {
           convertView = LayoutInflater.from(mContext).inflate(R.layout.item_layout, parent, false);
           holder = new ViewHolder();
           holder.tv_id = convertView.findViewById(R.id.tv_id);
           holder.tv_name = convertView.findViewById(R.id.tv_name);
           convertView.setTag(holder);
       } else {
           holder = (ViewHolder) convertView.getTag();
       }
       SomeModel data = mDataList.get(position);
       holder.tv_id.setText(String.valueOf(data.getId()));
       holder.tv_name.setText(data.getName());
       return convertView;
   }
   
   static class ViewHolder {
       TextView tv_id;
       TextView tv_name;
   }
   

   }
   ```

3. 在Activity中使用Adapter展示ListView

   首先，我们需要在Activity中获取解析好的List数据，这里就不演示具体获取数据的方法了。

   java
ListView listView = findViewById(R.id.listview);
MyAdapter adapter = new MyAdapter(dataList, this);
listView.setAdapter(adapter);

4. 带有搜索功能的ListView展示

   ```java
   ListView listView = findViewById(R.id.listview);
   MyAdapter adapter = new MyAdapter(dataList, this);
   listView.setAdapter(adapter);

   EditText et_search = findViewById(R.id.et_search);
   et_search.addTextChangedListener(new TextWatcher() {
   @Override
   public void beforeTextChanged(CharSequence s, int start, int count, int after) {
   }

   @Override
   public void onTextChanged(CharSequence s, int start, int before, int count) {
   }
   
   @Override
   public void afterTextChanged(Editable s) {
       String searchText = s.toString();
       List<SomeModel> searchList = new ArrayList<>();
   
       if (TextUtils.isEmpty(searchText)) {
           searchList.addAll(dataList);
       } else {
           for (SomeModel data : dataList) {
               if (data.getName().contains(searchText)) {
                   searchList.add(data);
               }
           }
       }
   
       adapter.setData(searchList);
       adapter.notifyDataSetChanged();
   }
   

   });
   ```

至此，整个“Android解析XML(PULL)展示到ListView”的完整攻略已结束，希望能对您有所帮助。