Text message sent by Android listening

Text message sent by Android listening
Run: prerequisites:

To listen for changes to the data of the specified ContentProvider, you must register the CotentObserver listener with the specified Uri through ContentResolver. ContentResolver provides the following methods:Register the listener:

Publicfinal void registerContentObserver (Uriuri, boolean policyfordescendents, ContentObserver observer)

Parameter: uri: The Uri of the ContentProvider monitored by the listener.

Policyfordescendents: false indicates exact match, that is, only the Uri is matched. true indicates that the derived Uri can be matched at the same time.

Observer: Listener instance derived from ContentObserver.

Cancel listener registration:

Public finalvoid unregisterContentObserver (ContentObserver observer)

Function: Disable the observation of a specified Uri.

Parameter: an instance of the observer ContentObserver derived class.

ContentObserver-content observer, which is used to observe (capture) Changes in the database caused by a specific Uri and then perform corresponding processing. It is similar to a Trigger in database technology ), when the Uri observed by ContentObserver changes, it is triggered. Triggers are divided into Table triggers and row triggers. Correspondingly, ContentObserver is also divided into "table" ContentObserver "and" row "ContentObserver. Of course, this is consistent with the Uri MIME Type it listens.

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ContentObserver class introduction:

Receives callback changes. It must be implemented by being added to a ContentObservable object.

Constructor:

Public Constructors

ContentObserver (Handler handler) OnChange () will happen on the provider Handler.

Note: This ContentObserver construction method must be called for all ContentObserver Derived classes.

Parameter: handler Handler object. It can be the main thread Handler (you can update the UI at this time) or any Handler object.

Common Methods:

Public Methods
Boolean	DeliverSelfNotifications () Returns true if this observer is interested in configurations for changes made through the cursor the observer is registered.
Final void	DispatchChange (boolean selfChange)
Void	OnChange (boolean selfChange) This method is called when a change occurs to the cursor that is being observed.

Note:

Void onChange (booleanselfChange)

Function: calls back this method when the observed Uri changes. All ContentObserver Derived classes must reload this method to process the logic.

Parameter: After selfChange callback, its value is generally false. this parameter is of little significance (I do not understand it, and it is the most important to understand the method ).

Follow these steps to observe a specific Uri:

1. To create a specific ContentObserver derived class, you must reload the parent class constructor and the onChange () method must be reloaded to implement the callback function.

2. Use context. getContentResolover () to obtain the ContentResolove object, and then call registerContentObserver () to register the content observer.

For example: // for content: // sms, the registration listener getContentResolver (). registerContentObserver (Uri.Parse

("Content: // sms "),True,NewSmsObserver (NewHandler ()));

3. Because the life cycle of ContentObserver is not synchronized with Activity and Service, you need to manually call unregisterContentObserver () to cancel registration when you do not need it.

SMS related permissions:

Related Protocols: Content: // sms/inbox Inbox
Content: // sms/sent Sent
Content: // sms/draft Draft
Content: // sms/outbox Sender
Content: // sms/failed Failed to send
Content: // sms/queued List to be sent

Sms-related fields and descriptions in the database:

Field	Description
_ Id	SMS number, such as 100
Thread_id	The conversation serial number, such as 100, is the same as the serial number of the text message sent by the same mobile phone number.
Address	Sender address, that is, the mobile phone number, such as + 86138138000
Person	Sender. If the sender is a specific name in the address book, the stranger is null.
Date	Date, long type, such as 1346988516, you can set the date display format
Protocol	Protocol 0SMS_RPOTO SMS, 1MMS_PROTO MMS
Read	Whether to read 0 unread, 1 read
Status	SMS status-1 received, 0 complete, 64 pending, 128 failed
Type	SMS type 1 is received, and 2 is sent
Body	SMS content
Service_center	Number of the SMS service center, for example, + 8613800755500

Application instance:

Package com. jph. monitorsms; import java. text. simpleDateFormat; import java. util. date; import android.net. uri; import android. OS. bundle; import android. OS. handler; import android. widget. textView; import android. widget. toast; import android. app. activity; import android. database. contentObserver; import android. database. cursor;/*** Describe:
* Get the text message that the user is sending * This instance obtains the message that the mobile phone is sending by changing the registration listener for the content: // sms data. * @ Author JPH * Date: 2014.07.20 **/public class MonitorSms extends Activity {TextView txtView; @ Overrideprotected void onCreate (Bundle savedInstanceState) Comment View); // content: // sms Data Change register listener getContentResolver (). registerContentObserver (Uri. parse ("content: // sms"), true, new SmsObserver (new Handler ()));} // a listener class SmsObserver extends ContentObserver {public SmsObserver (Handler handler) {super (handler) inherited from ContentObserver ); // TODO Auto-generated constructor stub} @ Overridepublic void onChange (boolean selfChange) {// TODO Auto-generated method stub // query the text message Cursor cursor = getContentResolver () sent to the box (). query (Uri. parse ("content: // sms/outbox"), null, null); // retrieve the text message while (cursor. moveToNext () {StringBuffer sb = new StringBuffer (); // obtain the SMS Sending address sb. append ("Sending address:" + cursor. getString (cursor. getColumnIndex ("address"); // obtain the title sb of the SMS. append ("\ n title:" + cursor. getString (cursor. getColumnIndex ("subject"); // obtain the sb. append ("\ n content:" + cursor. getString (cursor. getColumnIndex ("body"); // obtain the SMS sending time Date date = new Date (cursor. getLong (cursor. getColumnIndex ("date"); // format the date in seconds. SimpleDateFormat sdf = new SimpleDateFormat ("MM dd, yyyy, hh, mm, ss "); sb. append ("\ n time:" + sdf. format (date); System. out. println ("the queried text message is being sent:" + sb. toString (); Toast. makeText (MonitorSms. this, sb. toString (), Toast. LENGTH_LONG ). show (); txtView. setText (sb. toString ();} super. onChange (selfChange );}}}