CN105610888A - Method of using socket to push message based on Android and system thereof - Google Patents

Abstract

The invention discloses a method and a system for pushing messages based on an android using a socket. The method includes: A. a server starts and opens a socket; B. an android-based client starts a service and starts a thread therein, and initiates a socket in the thread Connection request; C. The server end and the client end establish a socket long connection for message push between the server end and the client end; D. The client end sends a heartbeat packet to the server end at a pre-frequency for heartbeat detection; the system Including server module, client module, connection module and detection module. By starting the service in the Android-based client and starting a thread in it, establishing a socket connection in the thread, and sending heartbeat detection to the server at a pre-frequency, it is ensured that the client can receive push information from the server at any time .

Description

Android-based method and system for using socket to push messages

technical field

The invention relates to the field of mobile Internet, in particular to an Android-based method and system for pushing messages through sockets.

Background technique

The current mainstream four message push methods based on the Android system are: XMPP (Extensible Message and Presence Protocol), GCM service (Google Cloud Messaging), MQTT protocol and HTTP round robin. Among them, the XMPP protocol is more complex, redundant (based on XML), traffic and electricity cost, and the cost of deploying hardware is high; GCM is a cloud messaging service launched by Google, that is, the second generation of G2DM. Its use is limited by the Android version and must be greater than 2.2 The service is not stable enough in China and requires users to bind a Google account, which is limited by Google; MQTT is a lightweight, agent-based "publish/subscribe" mode message transmission protocol, which is currently not mature enough , The implementation is more complicated, the server component rsmb is not open source, and the cost of deploying hardware is high; the HTTP polling method is to obtain the latest news from the HTTP server interface (WebServiceAPI) at regular intervals, which has poor real-time performance. Now the push function that is widely used is XMPP, as shown in Figure 1, three roles are defined in XMPP, client, server, and gateway. Communication can occur bi-directionally between any two of the three. The server also undertakes the functions of client information recording, connection management and information routing. The gateway is responsible for interconnection and intercommunication with heterogeneous instant messaging systems, which may include SMS (short message), MSN, ICQ and so on. The basic form of networking is a single client connecting to a single server via TCP/IP, and then transferring XML over it.

The Socket protocol is simpler and more stable than the above protocols. It does not depend on a specific company. It is very mature, the deployment cost is not high, and it has the strongest real-time performance, especially in chat software. The English original meaning of Socket is "hole" or "socket". As the process communication mechanism of BSDUNIX, the latter meaning is taken. Usually also called "socket", it is used to describe IP addresses and ports, and is a handle of a communication chain, which can be used to realize communication between different virtual machines or different computers. Hosts on the Internet generally run multiple service software and provide several services at the same time. Each service opens a Socket and binds to a port, and different ports correspond to different services. Socket is just like its English original meaning, like a porous socket. A host is like a room full of various sockets, each socket has a number, some sockets provide 220-volt alternating current, some provide 110-volt alternating current, and some provide cable TV programs. The client software can get different services by inserting the plugs into sockets with different numbers.

To use a socket connection, you must first establish a socket server externally. The mobile phone sends a socket request to the server to establish a long connection. This long connection is stable and real-time. Anytime the server wants to push a message to the client, it can be received immediately. , theoretically the socket will remain connected all the time, but the long connection of the socket in the actual application will encounter two problems: first, due to the instability of the network or the load of the server, the socket may be disconnected, so that it cannot receive Push; second, because the Android system will kill the application when the memory is insufficient, the user sometimes manually closes the application, causing the socket to be disconnected, and the function we want cannot be achieved.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art problems, and provide a method and system based on Android and using socket to push messages.

According to one aspect of the present invention, there is provided a method for using socket push messages based on Android, comprising the following steps:

A: The server starts and opens the socket;

B: The Android-based client starts the service and starts a thread in it, and initiates a socket connection request in the thread;

C: The server and the client establish a long socket connection for message push between the server and the client;

D: The client sends a heartbeat packet to the server at a predetermined frequency for heartbeat detection.

Preferably, the service runs in the background of the Android system.

Preferably, the heartbeat detection includes the steps of:

D1: The client sends a heartbeat packet to the server at intervals and starts a timeout timer at the same time;

D2: If the client receives the response packet from the server, delete the timeout timer;

D3: If the client's timeout timer expires and the response packet is still not received, reconnect.

Preferably, the time interval is set as a periodic time interval.

Preferably, the heartbeat packet is set as a small data packet or an empty packet containing only a packet header.

Preferably, the response packet is set as a small data packet or an empty packet containing only a packet header.

Preferably, the number of clients is greater than 1, the number of services opened on each client is greater than 1, and each service establishes a long socket connection with the server.

According to one aspect of the present invention, a kind of system utilizing socket push message based on Android is provided, comprising:

The server module is configured to start on the server side and open the socket;

The client module is configured to start service on the Android-based client and start a thread therein, and initiate a socket connection request in the thread;

The connection module is configured to establish a long socket connection between the server and the client, so as to push messages between the server and the client;

The detection module is configured to send a heartbeat packet from the client to the server at a pre-frequency for heartbeat detection.

Preferably, the detection module includes:

The sending unit is configured to send a heartbeat packet to the server every time interval at the client;

a receiving unit configured to receive a response packet from the server at the client;

The timing unit is configured to start a timeout timer on the client. If the client receives a response packet from the server, the timeout timer is deleted. If the client’s timeout timer expires and the response packet is still not received, reconnection is performed.

Preferably, the time interval is set as a periodic time interval.

Preferably, the heartbeat packet is set as a small data packet or an empty packet containing only a packet header.

Preferably, the response packet is set as a small data packet or an empty packet containing only a packet header.

The beneficial effects of the present invention are:

Service is a component of the Android system that runs in the background of the Android system. When the Service is enabled in the program, the Service can continue to run even if the program is closed, so the socket connection established in the service will not be disconnected because the program is closed. The socket connection of the client is guaranteed; the heartbeat detection can ensure that even if the socket is disconnected due to the network or firewall, it can be reconnected in time to ensure the connection between the server and the client, so that the client can receive the push message from the server in time.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and example.

Fig. 1 is a schematic structural diagram of using XMPP to push messages based on Android in the prior art.

Fig. 2 is a schematic structural diagram of using socket to push messages based on Android according to the present invention.

Fig. 3 is the flow chart of the method for utilizing socket push messages based on Android according to the first embodiment of the present invention;

FIG. 4 is a block diagram of an Android-based system for pushing messages through sockets according to a third embodiment of the present invention.

detailed description

The present invention provides a method and a system for pushing messages based on Android using sockets, as shown in Figure 2, including a server and a client, and a long connection is established between the server and the client through a socket for mutual messaging push.

According to an embodiment of the present invention, as shown in Figure 3, the socket long connection includes steps:

A: The server starts and opens the socket;

Specifically, the server opens a socket server, the code is as follows:

Among them, the Chinese characters starting with // are the explanation of the code.

ServerSocketserver = newServerSocket(20000);

B: the Android-based client starts service and starts a thread therein, and initiates a socket connection request in this thread;

Specifically, start the service when the client's application is started:

IntentstartIntent = newIntent(Login. this, ClientService. class);

startService(startIntent);

//Service (service) class

publicclassClientService extendsService{

//Rewrite the oncreat method of the service and create a new thread

Override

public voidonCreate(){

//TODO Auto-generated methods stub

super.onCreate();

context = getApplicationContext();

//Create a new thread

ClientConThreadclient = newClientConThread(context);

client.start();//Start a new thread

C: The server end and the client end establish a socket long connection for pushing messages between the server end and the client end;

After the thread starts, it will initiate a socket connection request, the code is as follows:

Wherein, the service runs in the background of the Android system.

In this way, the socket connection is established. Since it is established in the service, even if the program is killed by the system or the user, the socket is still there, which ensures the socket connection of the client.

D: The client sends a heartbeat packet to the server at a predetermined frequency for heartbeat detection.

The heartbeat detection steps are:

D1: The client sends a heartbeat packet to the server at intervals and starts a timeout timer at the same time;

D2: If the client receives the response packet from the server, delete the timeout timer;

D3: If the client's timeout timer expires and the response packet is still not received, reconnect.

The time interval can be set as a periodic time interval according to needs, and there is no special regulation for the heartbeat packet and the response packet, which can be a small data packet, or an empty packet containing only the header.

The heartbeat detection code is as follows:

In this way, the client will regularly send socket requests to detect the connection, and if it is found to be disconnected, it will reconnect. The default sending interval of the heartbeat packet is two hours, and the detection time and times of the heartbeat packet can be set as needed.

Through this operation, it can be ensured that even if the socket is disconnected due to the network or firewall, it can be reconnected in time to ensure the connection between the server and the client, so that the client can receive the push message from the server in time.

Through the combination of the above methods, it is ensured that the client socket is not disconnected and the connection to the server is maintained. This enables the client to receive messages from the server at any time.

According to the second embodiment of the present invention, with reference to Fig. 2, it is basically the same as the first embodiment, the difference is that the number of clients is greater than 1, and the number of services opened on each client is greater than 1, which are respectively connected to the server Establish a persistent socket connection.

According to the third embodiment of the present invention, a kind of Android-based system utilizing socket to push messages is provided, including:

The server module is configured to start on the server side and open the socket;

The client module is configured to start service on the Android-based client and start a thread therein, and initiate a socket connection request in the thread;

The connection module is configured to establish a long socket connection between the server and the client, so as to push messages between the server and the client;

The detection module is configured to send a heartbeat packet from the client to the server at a pre-frequency for heartbeat detection.

The detection module includes:

The sending unit is configured to send a heartbeat packet to the server every time interval at the client;

a receiving unit configured to receive a response packet from the server at the client;

The timing unit is configured to start a timeout timer on the client. If the client receives a response packet from the server, the timeout timer is deleted. If the client’s timeout timer expires and the response packet is still not received, reconnection is performed.

The detailed embodiments of the above modules are similar to the first embodiment, and will not be described in detail here.

The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent deformations or replacements without violating the spirit of the present invention. These equivalent modifications or replacements are all within the scope defined by the claims of the present application.

Unless a required step requires input generated by a preceding step, the specific order of steps described herein is for illustration only, and not limitation.

Claims (11)

1. the method for utilizing socket PUSH message based on Android, is characterized in that, comprises step:

A: server end starts and opens socket;

B: the client based on Android is opened service and starts therein a thread initiates socket and connects in this threadRequest;

C: server end is set up socket length with client and is connected, and pushes away for carrying out message between server end and clientSend;

D: client sends heartbeat packet by a pre-frequency to server end, to carry out heartbeat detection.

2. the method for utilizing socket PUSH message based on Android according to claim 1, is characterized in that the described heartJump to detect and comprise the steps:

D1: client sends a heartbeat packet to server end every a time interval, and starts an overtime timing simultaneouslyDevice;

D2: if client is received the response packet of server, delete overtime timer;

D3: if the overtime timer of client is overtime, still do not receive response packet, reconnect.

3. the method for utilizing socket PUSH message based on Android according to claim 2, is characterized in that, when describedBetween be set to the periodically time interval.

4. the method for utilizing socket PUSH message based on Android according to claim 2, is characterized in that the described heartJump the sky bag that bag is set to small data packets or only comprises packet header.

5. the method for utilizing socket PUSH message based on Android according to claim 2, is characterized in that, described answeringAnswer the sky bag that bag is set to small data packets or only comprises packet header.

6. the method for utilizing socket PUSH message based on Android according to claim 1, is characterized in that described visitorFamily terminal number amount is greater than 1, and the service quantity of opening in each client is greater than 1, each service respectively with described serviceDevice end is set up the long connection of socket.

7. the system of utilizing socket PUSH message based on Android, is characterized in that, comprising:

Server module, is configured to start and open socket at server end;

Client modules, is configured to open service and start therein a thread in the client based on Android, at this threadMiddle initiation socket connection request;

Link block, is configured to set up socket length in server end and client and is connected, for server end and clientBetween carry out message push;

Detecting module, is configured to send heartbeat packet by a pre-frequency to server end in client, to carry out heartbeat detection.

8. the system of utilizing socket PUSH message based on Android according to claim 7, is characterized in that described inspectionSurvey module comprises:

Transmitting element, is configured to send a heartbeat packet to server end in client every a time interval;

Receiving element, is configured to the response packet at client server;

Timing unit, is configured at overtime timer of client terminal start-up, if client is received the response packet of server,Delete overtime timer, if the overtime timer of client is overtime, still do not receive response packet, reconnect.

9. the system of utilizing socket PUSH message based on Android according to claim 8, is characterized in that, when describedBetween be set to the periodically time interval.

10. the system of utilizing socket PUSH message based on Android according to claim 8, is characterized in that, described inHeartbeat packet is set to small data packets or only comprises the sky bag in packet header.

11. systems of utilizing socket PUSH message based on Android according to claim 8, is characterized in that, described inResponse packet is set to small data packets or only comprises the sky bag in packet header.