安卓中xml学习笔记
生成xml 的方式
package com.example.writexml;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlSerializer;
import com.xml.sms.domain.SmsInfo;
import android.animation.ArgbEvaluator;
import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.os.Environment;
import android.util.Xml;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
import android.os.Build;
public class MainActivity extends Activity implements OnClickListener {
private List<SmsInfo> smss;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bt1 = (Button) findViewById(R.id.bt1);
Button bt2 = (Button) findViewById(R.id.bt2);
bt1.setOnClickListener(this);
bt2.setOnClickListener(this);
long address = 1300001;
smss = new ArrayList<SmsInfo>();
for (int i = 0; i < 10; i++) {
smss.add(new SmsInfo("短信内容"+i, Long.toString(address+i),1,System.currentTimeMillis(),i));
}
}
public void onClick(View v) {
switch (v.getId())
{
case R.id.bt1:
writeStringXml();
break;
case R.id.bt2:
xmlSerailze();
break;
}
}
public void writeStringXml()
{
System.out.println(Environment.getExternalStorageDirectory());
File file = new File(this.getFilesDir(),"sringXml.xml");
try {
FileOutputStream fo = new FileOutputStream(file);
String str = "<?xml version=\"1.0\" encoding=\"utf-8\"?>";
str+="<Smss>";
for (SmsInfo info : smss) {
str+="<sms>";
str+="<body>";
str+=info.getBody();
str+="</body>";
str+="<address>";
str+=info.getAddress();
str+="</address>";
str+="<type>";
str+=info.getType();
str+="</type>";
str+="<time>";
str+=info.getTime();
str+="</time>";
str+="</sms>";
}
str+="</Smss>";
fo.write(str.getBytes());
fo.close();
Toast.makeText(this, "保存xml成功", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Toast.makeText(this, "保存失败", Toast.LENGTH_SHORT).show();
}
}
public void xmlSerailze ()
{
File file = new File(this.getFilesDir(), "stringXml2.xml");
FileOutputStream fo;
try {
fo = new FileOutputStream(file);
XmlSerializer xml = Xml.newSerializer();
xml.setOutput(fo, "utf-8");
xml.startDocument(null,true);
xml.startTag(null, "smss");
for (SmsInfo info : smss) {
xml.startTag(null, "sms");
xml.attribute(null, "id", info.getId()+"");
xml.startTag(null, "body");
xml.text(info.getBody());
xml.endTag(null,"body");
xml.startTag(null, "address");
xml.text(info.getAddress());
xml.endTag(null,"address");
xml.startTag(null, "time");
xml.text(Long.toString(info.getTime()));
xml.endTag(null,"time");
xml.startTag(null, "type");
xml.text(info.getType()+"");
xml.endTag(null,"type");
xml.endTag(null, "sms");
}
xml.endTag(null, "smss");
xml.endDocument();
fo.close();
Toast.makeText(this, "保存xml成功", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(this, "保存失败", Toast.LENGTH_SHORT).show();
}
}
}
2,利用xmlPull解析xml文件
watherInfo.java
package com.xml.domain;
public class watherInfo {
private String name;
private String temp;
private String pm;
private String date;
private int id;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getTemp() {
return temp;
}
public void setTemp(String temp) {
this.temp = temp;
}
public String getPm() {
return pm;
}
public void setPm(String pm) {
this.pm = pm;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
@Override
public String toString() {
return "天气预报: [天气=" + name + ", 温度=" + temp + ", pm=" + pm
+ ", 日期=" + date + "]";
}
}
package com.xml.service;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import android.util.Log;
import android.util.Xml;
import com.xml.domain.watherInfo;
public class watherService {
/**
*
* @param is
* @return
* @throws Exception
*/
static public List<watherInfo> getWatherInfos(InputStream is) throws Exception
{
XmlPullParser parser = Xml.newPullParser();
parser.setInput(is, "utf-8");
int type = parser.getEventType();
List<watherInfo> watherInfos = null;
watherInfo watherInfo = null;
while (type != XmlPullParser.END_DOCUMENT) {
switch (type) {
case XmlPullParser.START_TAG:
if ("weather".equals(parser.getName())) {
watherInfos = new ArrayList<watherInfo>();
} else if ("city".equals(parser.getName())) {
watherInfo = new watherInfo();
String id = parser.getAttributeValue(0);
watherInfo.setId(Integer.parseInt(id));
} else if ("name".equals(parser.getName())) {
String name = parser.nextText();
watherInfo.setName(name);
}else if ("temp".equals(parser.getName())) {
String temp =parser.nextText();
watherInfo.setTemp(temp);
}else if ("pm".equals(parser.getName())) {
String pm = parser.nextText();
watherInfo.setPm(pm);;
}else if ("date".equals(parser.getName())) {
String date = parser.nextText();
watherInfo.setDate(date);
}
break;
case XmlPullParser.END_TAG:
if ("city".equals(parser.getName())) {
Log.i("test", watherInfo.toString());
watherInfos.add(watherInfo);
watherInfo = null;
}
break;
}
is.close();
type = parser.next();
}
return watherInfos;
}
}
<?xml version="1.0" encoding="utf-8"?> <weather> <city id="1"> <name>北京</name> <temp>25度</temp> <pm>2.8</pm> <date>2015-05-20</date> </city> <city id="2"> <name>北京</name> <temp>25度</temp> <pm>2.8</pm> <date>2015-05-20</date> </city> <city id="3"> <name>北京</name> <temp>25度</temp> <pm>2.8</pm> <date>2015-05-20</date> </city> </weather>
package com.example.xmlparse;
import java.io.InputStream;
import java.util.List;
import com.xml.domain.watherInfo;
import com.xml.service.watherService;
import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import android.widget.Toast;
import android.os.Build;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView tv = (TextView) findViewById(R.id.tv);
StringBuilder sb = new StringBuilder();
InputStream is = MainActivity.class.getClassLoader().getResourceAsStream("sringXml.xml");
try {
List<watherInfo> watherInfos = watherService.getWatherInfos(is);
for (watherInfo info : watherInfos) {
String str = info.toString();
sb.append(str);
sb.append("\r\n");
}
tv.setText(sb.toString());
Log.i("test", sb.toString());
Toast.makeText(this, "解析成功", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(this, "解析失败", Toast.LENGTH_SHORT).show();
}
}
}