xml格式保存信息到文件
发布时间:2020-12-16 08:58:26 所属栏目:百科 来源:网络整理
导读:package com.example.xml_duanxinbeifen; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.ArrayList; import java.util.List;
package com.example.xml_duanxinbeifen;
import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.ArrayList; import java.util.List; import java.util.Random; import org.xmlpull.v1.XmlSerializer; import android.app.Activity; import android.os.Bundle; import android.util.Xml; import android.view.View; import android.widget.Toast; import com.example.xml_duanxinbeifen.domain.SmsInfo; public class MainActivity extends Activity { private List<SmsInfo> smsinfos; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); smsinfos = new ArrayList<SmsInfo>(); Random random = new Random(); // 创建十条短信 for (int i = 0; i < 10; i++) { smsinfos.add(new SmsInfo(System.currentTimeMillis(),random .nextInt(2) + 1,"你好" + i,Integer.toString(i * 100 + i))); } } public void backMessage(View view) { XmlSerializer serializer = Xml.newSerializer(); // File file = new File(this.getFilesDir(),"sms.xml"); File file = new File("/data/data/com.example.xml_duanxinbeifen/sms.xml"); try { FileOutputStream fos = new FileOutputStream(file); // 初始化序列化器,指定文件和编码 serializer.setOutput(fos,"utf-8"); // true表示独立的文件 serializer.startDocument("utf-8",true); // 开始节点 serializer.startTag(null,"smss"); for(SmsInfo smsInfo:smsinfos) { serializer.startTag(null,"sms"); // 添加标签,以starttag开头,endtag结尾,中间的内容用属性text设置 serializer.startTag(null,"date"); serializer.text(smsInfo.getDate()+ ""); serializer.endTag(null,"date"); serializer.startTag(null,"body"); serializer.text(smsInfo.getBody()); serializer.endTag(null,"body"); serializer.startTag(null,"type"); serializer.text(smsInfo.getType() + ""); serializer.endTag(null,"type"); serializer.startTag(null,"address"); serializer.text(smsInfo.getAddress()); serializer.endTag(null,"address"); serializer.endTag(null,"sms"); } serializer.endTag(null,"smss"); serializer.endDocument(); fos.close(); Toast.makeText(this,"备份成功",Toast.LENGTH_SHORT).show(); } catch (Exception e) { // TODO Auto-generated catch block Toast.makeText(this,"备份失败",Toast.LENGTH_SHORT).show(); e.printStackTrace(); } } } 结果如图所示 将文件导出后,打开文件内容如下 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |