Compared to building intercom, Internet telephony can be said to have been in our lives for a short time.
Generally speaking, network telephony refers to IP as the network layer protocol of the computer network voice communication system, it uses the technology collectively referred to as VoIP (Voiceover IP), that is, the use of the network to achieve voice transmission. From the technical point of view, I
SOURCE Version: 4.4Skipping UI implementations such as Incallactivity. First look at the service and the bottom.1, a list of the following files will be found below frameworks/opt:./telephony/src/java/com/android/Internal/telephony/cdma/Cdmaservicestatetracker.java. /telephony/src/java/com/android/Internal/telephony/cd
Android Telephony-real-time mobile phone signal change source code analysis process record, androidtelephony
Source code: 4.4
Skip UI implementations such as InCallActivity. First look at the service and the underlying layer.
1. the following file list is found under frameworks/opt:
./telephony/src/java/com/android/internal/telephony/cdma/CdmaServiceStateTracker
What is Skype? Skype is a network of instant voice communication tools. The home of the system offers the latest official download of Skype's internet phone, which features other functions such as video chat, voice conferencing, multiplayer chat, file transfer, text chat, and other features that are required for IM. Today's small series for you to talk about the installation process of Skype.
How does Skype install?
1. Download the latest version of
The framework 1 involved in Android telephony is shown in.
Figure 1 Android telephony Framework Structure
Figure 1 shows some rules of the android telephony framework structure.
Android telephony's business applications span AP and BP. AP and BP communicate with each other, in line with the basic structure of the smartphone hardware described above.
The Andro
1 frameworks/base/telephony/Java/Android/telephony/CDMA provides APIs for using the specific telephone functions of CDMA.1.1) cdmacelllocation is the direct derived class of celllocation, indicating the location of a CDMA mobile phone call.Code Division Multiple Access, also known as code division multiple access, is a technology used in wireless communication. CDMA allows all users to use all the frequenci
Network Telephony Application of network developmentFirst, the original telephone communication introductionWe are familiar with the telephone communication methods, generally there are two kinds. One is a wired landline, the other is a wireless mobile phone (where I see wireless landline phones as a landline). Although the two kinds of telephone communication in different ways, but all in people's communication life plays an important role, and there
Wireless GSM telephony in the emulator
The simulator supports external radio communication, and external radio communication provides wireless communication test capability on the Development workstation. The following process describes how to use external radio communication to implement data and voice communication in the simulator:
1. Connect A Wavecom wmod2b external GSM module to a COM port on the Development workstation by using the instructions
The SPC has a history of nearly a century, now China has many manufacturing types of enterprises are still using the SPC, which is what we want to say the analog voice switch.When customers find us looking for solutions, especially in the manufacturing industry, and they still have traditional switches, they ask us if we can get a new phone system and a traditional analog voice switch. The answer, of course, is yes. Next, we offer a docking scheme for IP tel
What is Skype? Skype is a network of instant voice communication tools. The home of the system offers the latest official download of Skype's internet phone, which features other functions such as video chat, voice conferencing, multiplayer chat, file transfer, text chat, and other features that are required for IM. Today's small series for you to talk about the registration process of Skype.
How does Skype register?
1. First, download Skype network
Android Source code Analysis: Telephony part –gsmphoneRed Wolf BlogPhoneproxy/gsmphone/cdmaphoneIf Rilj provides a tool or pipeline, then the subclass and Phonefactory of the phone interface are packages/app/phone this application process to use RILJ this tool or pipeline to provide great convenience, They are a telephony function that manages the entire phone.Gsmphone and Cdmaphone implement the interfaces
Core Telephony Framework (key communication framework)Overview:This library is prefixed with CT (Core Telephony) and is used primarily to obtain information about the user's communication, which we can use to define an external interface for our own use. Of course we can just use this information to get the information we are currently calling.The CT object can obtain communication information, for example,
Android4.4 Telephony Process Analysis-call record loading process of dial-up applications (Dialer)
The code in this article takes the MTK platform Android 4.4 as the analysis object, which is somewhat different from Google's native AOSP. Please be aware of it.
The call history of the Android system is stored in the CALS table of the contact database contacts2.db. When the call record (calllog) is stored in the database, you can view my previous blog
In the previous article, we learned the Telephony class in android. provider. This article describes the classes in the android. telephony package. These classes are the APIs that android provides for upper-layer calls.
A series of Apis provided to monitor basic phone information. Such as the network type, connection status, and operating phone number tool class.
VcD4KPHA + kernel/kernel + iwODQzaG
This code is based on the MTK platform Android 4.4 As the analysis object, and Google native Aosp a little difference, please read the reader.This article mainly introduces the SIM card data reading process, when the RF state is in the ready state, at this time uicccardapplication should be in the Appstate.appstate_ready state, we follow this signal down. Read the Android4.4 telephony process Analysis--sim the initialization of the radio and SIM card
In the previous article, I learned about the telephony class in Android.provider.This article learns the classes in the Android.telephony package, which are the APIs that Android provides to the upper call.A series of APIs for monitoring basic telephone information. such as network type, connection status. The tool class that operates the phone number.Altogether 25 classes. The following describes each:TelephonymanagerProcessing the
, sim_state_puk_required, sim_state_network_locked, sim_ State_ready 12. publicstringgetsimoperator (): NBSP;MCC+MNC (Mobile Country code + mobile network Code) of the provider of the SIM. 5 or 6 decimal digits 13 . publicstring getsimoperatorname () : service Provider Name (SPN) public string getsimcountryiso () : iso Country code equivalent for The SIM provider ' s country code 15.publicstring getsimserialnumber () : serial number of the
This code is based on the MTK platform Android 5.1 as the analysis object, and Google native Aosp a little difference, please read the reader.This figure is mainly based on the Android source code to dial the phone process to draw, recorded the phone calls the main process:Reference Blog: http://blog.csdn.net/yihongyuelan/article/details/45098339Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Android5.1
/success (actual Sipprovider callback), the Fail/sucess interface of the transactionclient is called Public classTransactionclientextendsTransaction {Transactionclientlistener transaction_listener; Publictransactionclient (Sipprovider sip_provider, Message req, Transactionclientlistener listener) {Super(Sip_provider); Request=NewMessage (req); Init (Listener, Request.gettransactionid ()); //This.transaction_listener = listener;} //The actual Sipprovider callback Public voidOnreceivedmessage (Si
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