Content Viewer (a simple phone SMS bug)

I. Content Observer
* Notify content provider of changes
GetContext (). Getcontentresolver (). Notifychanges (Uri,null); Null indicates that there are no fixed receivers
* Write an observer in other applications and register an instance
Getcontentresolver (). Registercontentobserver (Uri,true,observer); The host data observed by the URI, true means that as long as the host matches, observer represents the specific observer
Example: SMS Bug

1. First write a myobserver inheritance contentobserver, overriding the OnChange method:public class myobserver extends  Contentobserver {    private context context;    public  myobserver (Context context, handler handler)  {         super (handler);        this.context = context;     }     @Override     public void  OnChange (Boolean selfchange, uri uri)  {         Super.onchange (Selfchange, uri);        //  fields in the SMS table read  : The  1 representative has read, 0 represents the field in the Unread         //  SMS table type :  2 represents the information that the monitored machine sends out, 1 represents the information received by the monitored device         //  gets the content parser          contentresOlver recolver = context.getcontentresolver ();         / /  query detection of the machine's system SMS         Cursor cursor =  Recolver.query (uri, new string[] {  "address",  "body",  "type",  "date"  } ,                null,  null,  "Date desc");         cursor.movetofirst ()  ;         //Get SMS Message         String  Address = cursor.getstring (0)  ;        string body  = cursor.getstring (1)  ;        int type =  cursor.getint (2)  ;        long date =  Cursor.getlong (3)  ; &NBSp;              if (TYPE == 2) {            string d = new  SimpleDateFormat ("yyyy mm month DD Day  HH:MM:SS"). Format (New date (Date))  ;             SYSTEM.OUT.PRINTLN ("The detected machine sent the message:  address:"  + address +   "  content:"  + body +  "Time  :"  + d );             toast.maketext (context,  "detected the machine sent the message:  address:"  +  address +  "  content:"  + body +  "Time  :"  + d, 0). Show ()  ;         }                 if (type == 1) {            &nBsp String d = new simpledateformat ("yyyy mm month DD Day  HH:MM:SS"). Format (New date (Date))  ;            SYSTEM.OUT.PRINTLN ("The detected machine receives information:   Address: " + address + "   content: " + body + " Time  : " + d  );             toast.maketext (context,  " The detected machine received the information:  address: " + address + "   content: " + body + " Time  : "  + d, 0). Show ()  ;        }           }}

2. write an observer in other applications and register an instance

Uri uri = uri.parse ("content://sms");//Monitored host
Getcontentresolver (). Registercontentobserver (URI, True, new Myobserver (This, new Handler ()));

This article is from the "Android Notes" blog, so be sure to keep this source http://2585211.blog.51cto.com/10044233/1665225

Content Viewer (a simple phone SMS bug)