android学习笔记36——使用原始XML文件

XML文件
android中使用XML文件，需要开发者手动创建res/xml文件夹。
实例如下：
100
101
102
103
104
105
106
107
108
109
110
111
book.xml==>
<?xml version="1.0" encoding="utf-8"?>
<books>
    <book publishDate="2016.05.05" price="88.6">android学习笔记</book>
    <book publishDate="2016.06.06" price="88.6">android解密</book>
    <book publishDate="2016.08.08" price="88.6">android深入浅出</book>
</books>
 
布局文件==》
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >
 
    <Button
        android:id="@+id/btnTest"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="Test" >
    </Button>
 
    <EditText
        android:id="@+id/edit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </EditText>
 
</LinearLayout>
 
代码实现==》
package com.example.myxml;
 
import org.xmlpull.v1.XmlPullParserException;
 
import android.R.xml;
import android.os.Bundle;
import android.app.Activity;
import android.content.res.XmlResourceParser;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
 
public class MainActivity extends Activity
{
 
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        Button btnTest = (Button) this.findViewById(R.id.btnTest);
        btnTest.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                XmlResourceParser xrp = getResources().getXml(R.xml.books);
                StringBuilder sb = new StringBuilder();
                try
                {
                    while (xrp.getEventType() != XmlResourceParser.END_DOCUMENT)
                    {
                        if (xrp.getEventType() == XmlResourceParser.START_TAG)// 如果遇到开始标签
                        {
                            // String tagName = xrp.getName();
                            if (xrp.getName().equals("book"))
                            {
                                // 根据名称获取属性值
                                sb.append("price: ");
                                sb.append(xrp.getAttributeValue(null, "price"));
                                sb.append("\n");
 
                                // 根据索引获取属性值
                                sb.append("publishDate: ");
                                sb.append(xrp.getAttributeValue(0));
                                sb.append("\n");
 
                                sb.append("bookName:    ");
                                // 获取XML节点的文本信息
                                sb.append(xrp.nextText());
 
                            }
                            sb.append("\n");
                        }
                        xrp.next();// 获取解析器的下一个事件
                    }
                    EditText edit = (EditText) findViewById(R.id.edit);
                    edit.setText(sb.toString());
                } catch (Exception e)
                {
                    e.printStackTrace();
                }
            }
        });
    }
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
 
}