xml文件是非常常用的,在android中json和xml是非常常用的两种封装数据的形式,从服务器中获取数据也经常是这两种形式的,所以学会生成和解析xml和json是非常有用的,json相对来说是比较简单的,咱不做介绍了,这里给大家讲一下xml的序列化生成和解析。不废话了,先上图,看怎么生成图中的xml数据。
首先,我把Person的实体类给大家贴出来,这个非常简单,我就不过多解释了,直接看代码就行了。
Person.java,代码如下:
- package net.loonggg.test;
- public class Person {
- private int id;
- private String age;
- private String name;
- private String sex;
- private String address;
- public int getId() {
- return id;
- }
- public void setId(int id) {
- this.id = id;
- }
- public String getAge() {
- return age;
- }
- public void setAge(String age) {
- this.age = age;
- }
- public String getName() {
- return name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public String getSex() {
- return sex;
- }
- public void setSex(String sex) {
- this.sex = sex;
- }
- public String getAddress() {
- return address;
- }
- public void setAddress(String address) {
- this.address = address;
- }
- @Override
- public String toString() {
- return "Person [id=" + id + ", age=" + age + ", name=" + name
- + ", sex=" + sex + ", address=" + address + "]";
- }
- }
package net.loonggg.test; public class Person {
private int id;
private String age;
private String name;
private String sex;
private String address; public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getAge() {
return age;
} public void setAge(String age) {
this.age = age;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public String getSex() {
return sex;
} public void setSex(String sex) {
this.sex = sex;
} public String getAddress() {
return address;
} public void setAddress(String address) {
this.address = address;
} @Override
public String toString() {
return "Person [id=" + id + ", age=" + age + ", name=" + name
+ ", sex=" + sex + ", address=" + address + "]";
} }
其次:生成xml文件的方法如下:
- /**
- * 生成xml
- */
- private void createXml() {
- XmlSerializer serializer = Xml.newSerializer();// xml文件生成器
- File file = new File(Environment.getExternalStorageDirectory(),
- "person.xml");
- FileOutputStream fos = null;
- try {
- fos = new FileOutputStream(file);
- serializer.setOutput(fos, "utf-8");// 为xml生成器设置输出流和字符编码
- serializer.startDocument("utf-8", true);// 开始文档,参数分别为字符编码和是否保持独立
- serializer.startTag(null, "persons"); // 开始标签,参数分别为:命名空间和标签名
- for (Person person : list) {
- serializer.startTag(null, "person");
- serializer.attribute(null, "id", person.getId() + "");
- serializer.startTag(null, "name");// 开始标签
- serializer.text(person.getName());// 文本内容
- serializer.endTag(null, "name");// 结束标签
- serializer.startTag(null, "sex");
- serializer.text(person.getSex());
- serializer.endTag(null, "sex");
- serializer.startTag(null, "age");
- serializer.text(person.getAge());
- serializer.endTag(null, "age");
- serializer.startTag(null, "address");
- serializer.text(person.getAddress());
- serializer.endTag(null, "address");
- serializer.endTag(null, "person");
- }
- serializer.endTag(null, "persons");// 结束标签
- serializer.endDocument();// 结束xml文档
- Toast.makeText(getApplicationContext(), "生成成功!", Toast.LENGTH_SHORT);
- } catch (Exception e) {
- Toast.makeText(getApplicationContext(), "生成失败!", Toast.LENGTH_SHORT);
- e.printStackTrace();
- } finally {
- try {
- fos.close();
- } catch (IOException e) {
- e.printStackTrace();
- }
- }
- }
/**
* 生成xml
*/
private void createXml() {
XmlSerializer serializer = Xml.newSerializer();// xml文件生成器
File file = new File(Environment.getExternalStorageDirectory(),
"person.xml");
FileOutputStream fos = null;
try {
fos = new FileOutputStream(file);
serializer.setOutput(fos, "utf-8");// 为xml生成器设置输出流和字符编码
serializer.startDocument("utf-8", true);// 开始文档,参数分别为字符编码和是否保持独立
serializer.startTag(null, "persons"); // 开始标签,参数分别为:命名空间和标签名
for (Person person : list) { serializer.startTag(null, "person");
serializer.attribute(null, "id", person.getId() + ""); serializer.startTag(null, "name");// 开始标签
serializer.text(person.getName());// 文本内容
serializer.endTag(null, "name");// 结束标签 serializer.startTag(null, "sex");
serializer.text(person.getSex());
serializer.endTag(null, "sex"); serializer.startTag(null, "age");
serializer.text(person.getAge());
serializer.endTag(null, "age"); serializer.startTag(null, "address");
serializer.text(person.getAddress());
serializer.endTag(null, "address"); serializer.endTag(null, "person"); }
serializer.endTag(null, "persons");// 结束标签
serializer.endDocument();// 结束xml文档
Toast.makeText(getApplicationContext(), "生成成功!", Toast.LENGTH_SHORT);
} catch (Exception e) {
Toast.makeText(getApplicationContext(), "生成失败!", Toast.LENGTH_SHORT);
e.printStackTrace();
} finally {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
} }
然后是解析xml文件的方法:
- /**
- * 解析xml文件
- */
- private List<Person> pullXml() {
- try {
- File file = new File(Environment.getExternalStorageDirectory(),
- "person.xml");
- FileInputStream fis = new FileInputStream(file);
- List<Person> persons = null;
- Person person = null;
- XmlPullParser parser = Xml.newPullParser();// 获取xml解析器
- parser.setInput(fis, "utf-8");// 参数分别为输入流和字符编码
- int type = parser.getEventType();
- while (type != XmlPullParser.END_DOCUMENT) {// 如果事件不等于文档结束事件就继续循环
- switch (type) {
- case XmlPullParser.START_TAG:
- if ("persons".equals(parser.getName())) {
- persons = new ArrayList<Person>();
- } else if ("person".equals(parser.getName())) {
- person = new Person();
- String id = parser.getAttributeValue(0);
- person.setId(Integer.parseInt(id));
- } else if ("name".equals(parser.getName())) {
- person.setName(parser.nextText());
- } else if ("sex".equals(parser.getName())) {
- person.setSex(parser.nextText());
- } else if ("address".equals(parser.getName())) {
- person.setAddress(parser.nextText());
- } else if ("age".equals(parser.getName())) {
- person.setAge(parser.nextText());
- }
- break;
- case XmlPullParser.END_TAG:
- if ("person".equals(parser.getName())) {
- persons.add(person);
- person = null;
- }
- break;
- }
- type = parser.next();// 继续下一个事件
- }
- return persons;
- } catch (NumberFormatException e) {
- e.printStackTrace();
- } catch (FileNotFoundException e) {
- e.printStackTrace();
- } catch (XmlPullParserException e) {
- e.printStackTrace();
- } catch (IOException e) {
- e.printStackTrace();
- }
- return null;
- }
/**
* 解析xml文件
*/
private List<Person> pullXml() {
try {
File file = new File(Environment.getExternalStorageDirectory(),
"person.xml");
FileInputStream fis = new FileInputStream(file);
List<Person> persons = null;
Person person = null;
XmlPullParser parser = Xml.newPullParser();// 获取xml解析器
parser.setInput(fis, "utf-8");// 参数分别为输入流和字符编码
int type = parser.getEventType();
while (type != XmlPullParser.END_DOCUMENT) {// 如果事件不等于文档结束事件就继续循环
switch (type) {
case XmlPullParser.START_TAG:
if ("persons".equals(parser.getName())) {
persons = new ArrayList<Person>();
} else if ("person".equals(parser.getName())) {
person = new Person();
String id = parser.getAttributeValue(0);
person.setId(Integer.parseInt(id));
} else if ("name".equals(parser.getName())) {
person.setName(parser.nextText());
} else if ("sex".equals(parser.getName())) {
person.setSex(parser.nextText());
} else if ("address".equals(parser.getName())) {
person.setAddress(parser.nextText());
} else if ("age".equals(parser.getName())) {
person.setAge(parser.nextText());
}
break;
case XmlPullParser.END_TAG:
if ("person".equals(parser.getName())) {
persons.add(person);
person = null;
}
break;
}
type = parser.next();// 继续下一个事件
}
return persons;
} catch (NumberFormatException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
再次是MainActivity里调用的部分代码:
- public class MainActivity extends Activity {
- private Button btn_create = null;
- private Button btn_pull = null;
- private TextView tv_show;
- private List<Person> list = null;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- btn_create = (Button) findViewById(R.id.createXml);
- btn_pull = (Button) findViewById(R.id.pullXml);
- tv_show = (TextView) findViewById(R.id.tvShow);
- list = new ArrayList<Person>();
- for (int i = 0; i < 5; i++) {
- Person person = new Person();
- person.setAge(i + 20 + "");
- person.setId(i);
- person.setName("loonggg" + i);
- person.setSex("男");
- person.setAddress("*" + i + 1 + "大街");
- list.add(person);
- }
- btn_create.setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View v) {
- createXml();
- }
- });
- btn_pull.setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View v) {
- tv_show.setText(pullXml().toString());
- }
- });
- }
- }
public class MainActivity extends Activity {
private Button btn_create = null;
private Button btn_pull = null;
private TextView tv_show;
private List<Person> list = null; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_create = (Button) findViewById(R.id.createXml);
btn_pull = (Button) findViewById(R.id.pullXml);
tv_show = (TextView) findViewById(R.id.tvShow);
list = new ArrayList<Person>();
for (int i = 0; i < 5; i++) {
Person person = new Person();
person.setAge(i + 20 + "");
person.setId(i);
person.setName("loonggg" + i);
person.setSex("男");
person.setAddress("*" + i + 1 + "大街");
list.add(person);
}
btn_create.setOnClickListener(new View.OnClickListener() { @Override
public void onClick(View v) {
createXml();
}
}); btn_pull.setOnClickListener(new View.OnClickListener() { @Override
public void onClick(View v) {
tv_show.setText(pullXml().toString());
}
});
}
}
最后是布局文件,代码如下;
- <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" >
- <Button
- android:id="@+id/createXml"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="生成xml" />
- <Button
- android:id="@+id/pullXml"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="解析xml" />
- <TextView
- android:id="@+id/tvShow"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content" />
- </LinearLayout>
<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" > <Button
android:id="@+id/createXml"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="生成xml" /> <Button
android:id="@+id/pullXml"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="解析xml" /> <TextView
android:id="@+id/tvShow"
android:layout_width="fill_parent"
android:layout_height="wrap_content" /> </LinearLayout>
到这里就完了,很简单吧!
代码下载地址:
http://download.csdn.net/detail/loongggdroid/6725669
版权声明:本文为博主原创文章,未经博主允许不得转载。