Android應用開發--使用XmlPullParser解析XML檔案
阿新 • • 發佈：2019-06-16
使用Android SDK自帶的XmlPullParser類可以很方便的解析XML檔案
參考連線：https://developer.android.google.cn/reference/org/xmlpull/v1/XmlPullParser?hl=en
準備一個XML檔案：
<?xml version="1.0" encoding="utf-8"?>
<Params name="demo">
<Param name="com.sina.weibo"/>
</Params> 新建一個HelloWorld程式，示例程式碼如下：
package com.tprime.demo; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.util.Xml; import android.view.View; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserException; import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private String TAG = "TAG_XML_PULL_PARSER"; private String configPath = "/sdcard/blacklist.xml"; private List<String> filterList = new ArrayList<String>(); private List<String> testNameList = new ArrayList<String>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); testNameList.add("com.sina.weibo"); testNameList.add("com.sina.weibo.MainActivity"); testNameList.add("com.sina"); testNameList.add("com"); testNameList.add(""); testNameList.add("/com.sina"); testNameList.add("com.*sina"); testNameList.add(null); } public void inFilterList(View v){ StringBuffer sb = new StringBuffer(); for(String name: testNameList) { sb.append(name + "\t"); sb.append(filterList.contains(name)); sb.append("\n"); } Log.d(TAG, sb.toString()); } public void parseConfigXml(View v) { Log.d(TAG, "parseConfigXml +++++++++++++++++++++++++++"); FileReader fileReader = null; try { File file = new File(configPath); fileReader = new FileReader(file); // XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); // XmlPullParser xmlParser = factory.newPullParser(); XmlPullParser xmlParser = Xml.newPullParser(); xmlParser.setInput(fileReader); int eventType = xmlParser.getEventType(); while (eventType != XmlPullParser.END_DOCUMENT) { switch (eventType) { case XmlPullParser.START_DOCUMENT: break; case XmlPullParser.START_TAG: Log.d(TAG, "OUTER if Param: " + xmlParser.getAttributeValue(0)); if (xmlParser.getName().equals("Param")) { Log.d(TAG, "INNER if Param: " + xmlParser.getAttributeValue(0)); if (xmlParser.getAttributeName(0).equals("name")) { filterList.add(xmlParser.getAttributeValue(0)); } } break; case XmlPullParser.END_TAG: break; default: break; } eventType = xmlParser.next(); } } catch (XmlPullParserException e) { Log.e(TAG, "ERROR 01: " + e.getStackTrace().toString()); e.printStackTrace(); } catch (FileNotFoundException e) { Log.e(TAG, "ERROR 02: " + e.getStackTrace().toString()); e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if(fileReader != null){ try { fileReader.close(); } catch (IOException e) { e.printStackTrace(); } } } Log.d(TAG, "parseConfigXml ---------------------------"); } }
對應的xml而已很簡單，就兩個按鈕，程式碼如下：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
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:text="開始解析"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="parseConfigXml"/>
<Button
android:text="是否在名單中"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="inFilterList"/>
</android.support.v7.widget.LinearLayoutCompat>