Android Hands-on tutorial nineth text message efficient backup

Android Hands-on tutorial nineth text message efficient backup _android

Last Update:2017-01-19 Source: Internet

Author: User

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Android SMS efficiently backs up this article and takes on an article. Use efficient ways to back up SMS--xml serializers.

Store text messages and store them in an object way. First create JavaBean:

Package com.itydl.createxml.domain; 
 
public class Message { 
 
 private String body; 
 private String date; 
 Private String address; 
 Private String type; 
 Public String GetBody () {return body 
  ; 
 } 
 public void Setbody (String body) { 
  this.body = body; 
 } 
 Public String GetDate () {return 
  date; 
 } 
 public void setdate (String date) { 
  this.date = date; 
 } 
 Public String getaddress () {return address 
  ; 
 } 
 public void setaddress (String address) { 
  this.address = address; 
 } 
 Public String GetType () {return 
  type; 
 } 
 public void SetType (String type) { 
  this.type = type; 
 } 
 Public message (string body, string date, string address, String type) { 
  super (); 
  This.body = body; 
  This.date = date; 
  this.address = address; 
  This.type = type; 
 }

The

then diamante in Mainactivity is as follows:

Package Com.itydl.xmlserializer; 
Import Java.io.File; 
Import Java.io.FileOutputStream; 
Import java.io.IOException; 
Import java.util.ArrayList; 
 
Import java.util.List; 
 
Import Org.xmlpull.v1.XmlSerializer; 
 
Import Com.itheima.createxml.domain.Message; 
Import Android.os.Bundle; 
Import android.app.Activity; 
Import android.util.Xml; 
Import Android.view.Menu; 
Import Android.view.View; 
 
 To better preserve the different and responsible data, use the XML serializer public class Mainactivity the extends activity {list<message> smslist; 
  @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); 
  Setcontentview (R.layout.activity_main); 
  Virtual 10 Message Smslist = new arraylist<message> ();  for (int i = 0; i < i++) {Message SMS = new Message ("Small zhi good" + I, System.currenttimemillis () + "", "138" + 
   i + I, "1"); 
  Smslist.add (SMS); } public void Click (View v) {//XML file is generated using the XML serializer. The serializer filters out the//1 by filtering out the clutter (the tag attribute in the SMS). Get the Serializer object xmlserializeR xs = Xml.newserializer (); 
  2. Initialization. Because the XML file is involved, initialization also contains the filename and path file = new file ("Sdcard/sms2.xml"); 
   try {fileoutputstream fos = new FileOutputStream (file); 
    
   Enconding: Specifies what encoding is used to generate the XML file Xs.setoutput (FOS, "Utf-8"),//setoutput (OutputStream OS, String encoding), encoding by default U8  3. Start generating XML file//enconding: Specifies the value of the Enconding property in the header node xs.startdocument ("Utf-8", true);//Generation header node (highest row), Startdocument (String  Encoding, Boolean Standalone) Xs.starttag (null, "message");//Generate a root node, start tag node for (message sms:smslist) 
     
    {Xs.starttag (NULL, "SMS"); Xs.starttag (NULL, "body");//start and end a pair of write. There are also four sub nodes Xs.text (sms.getbody () + "<body>");//This will not be an error. 
     
    But the <body> as the content of the Xs.endtag (null, "body"); 
    Xs.starttag (NULL, "date"); 
    Xs.text (Sms.getdate ()); 
     
    Xs.endtag (NULL, "date"); 
    Xs.starttag (NULL, "type"); 
    Xs.text (Sms.gettype ()); 
     
    Xs.endtag (NULL, "type"); 
    Xs.starttag (NULL, "address"); Xs.text (sms.geTaddress ()); 
     
    Xs.endtag (NULL, "address"); 
   Xs.endtag (NULL, "SMS"); 
    
   } Xs.endtag (NULL, "message"); 
  Tells the serializer that the file was generated xs.enddocument (); 
  catch (Exception e) {//TODO auto-generated catch block E.printstacktrace ();  } 
 } 
 
}

Finally, remember to add the right:

Copy Code code as follows:

<uses-permission android:name= "Android.permission.WRITE_EXTERNAL_STORAGE"/>

See this way to solve the problems encountered before, but also a lot of efficiency.

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.

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