【Android开发】XML文件解析
最近在做一个项目，涉及到XML文件的解析，废话不多说，如下：
读取
1 private ArrayList<Data> readXMLLocked() { 2 File file = new File(mDirPath, mFileName); 3 if (!file.exists()) { 4 return null; 5 } 6 ArrayList list = new ArrayList<Data>(); 7 InputStream in = null; 8 try { 9 in = new FileInputStream(file); 10 XmlPullParser pullParser = Xml.newPullParser(); 11 pullParser.setInput(in, "UTF-8"); 12 int event = pullParser.getEventType(); 13 while (event != XmlPullParser.END_DOCUMENT) { 14 switch (event) { 15 case XmlPullParser.START_DOCUMENT: 16 break; 17 case XmlPullParser.START_TAG: 18 String name = pullParser.getName(); 19 ILog.d(TAG, "xmlname:" + name); 20 if (TAG_ITEM.equals(name)) { 21 int count = pullParser.getAttributeCount(); 22 Data data = new Data(); 23 for (int i = 0; i < count; i++) { 24 String attName = pullParser.getAttributeName(i); 25 if (ATT_DATA.equals(attName)) { 26 data.setmWeight(Float.valueOf(pullParser.getAttributeValue(i))); 27 } else if (ATT_TIME.equals(attName)) { 28 data.setTime(Long.valueOf(pullParser.getAttributeValue(i))); 29 } 30 } 31 list.add(data); 32 } else if (TAG_VERSION.equals(name)) { 33 34 } 35 break; 36 case XmlPullParser.END_TAG: 37 break; 38 } 39 event = pullParser.next(); 40 } 41 } catch (Exception e) { 42 e.printStackTrace(); 43 return null; 44 } finally { 45 try { 46 in.close(); 47 } catch (Exception e) { 48 e.printStackTrace(); 49 } 50 } 51 return list; 52 }
保存：
1 private synchronized boolean saveXMLLocked(ArrayList<Data> list, OutputStream outStream) { 2 try { 3 XmlSerializer serializer = Xml.newSerializer(); 4 serializer.setOutput(outStream, "UTF-8"); 5 serializer.startDocument("UTF-8", true); 6 serializer.startTag(null, TAG_IWEIHT); 7 serializer.startTag(null, TAG_VERSION); 8 serializer.text(String.valueOf(DBHelper.VERSION)); 9 serializer.endTag(null, TAG_VERSION); 10 for (Data data : list) { 11 serializer.startTag(null, TAG_ITEM); 12 serializer.attribute(null, ATT_DATA, String.valueOf(data.getWeight())); 13 serializer.attribute(null, ATT_TIME, String.valueOf(data.getTime())); 14 serializer.endTag(null, TAG_ITEM); 15 } 16 serializer.endTag(null, TAG_IWEIHT); 17 serializer.endDocument(); 18 } catch (Exception e) { 19 e.printStackTrace(); 20 return false; 21 } finally { 22 try { 23 outStream.flush(); 24 outStream.close(); 25 } catch (Exception e) { 26 e.printStackTrace(); 27 } 28 } 29 return true; 30 }
对应的XML文件的格式如下：
1 <?xml version='1.0' encoding='UTF-8' standalone='yes' ?> 2 <iweight> 3 <version>1</version> 4 <item data="25.0" time="1482927231388" /> 5 <item data="75.0" time="1482927234989" /> 6 <item data="48.0" time="1482927238008" /> 7 </iweight>
