When you first started learning service, you thought it was a thread encapsulation, and you could perform time-consuming operations. In fact, service is run in the main thread. Direct execution of time-consuming operations can block the main thread. A long time straight ANR.
We know that service can perform some background tasks, is the background task is not a
Since my version has a minimum of 2.2, so only the source down to change their own, if you think too much can be compiled into a jar reference, I am not very familiar with Java, if this version of the error also please point out, this figure shows the Android 2.2 and 4.0 version.
Chat_hub Code:
Chathub.java Code:
Package com.loan.zhironghuimobile;
Import Org.json.JSONArray;
Import com.zsoft.SignalA.Hubs.HubConnection;
Import
One of the four components of service-android. Personal "backend service" means that its own operation does not depend on the user's visual UI interfaceIn practical development, we often need the service and activity to pass data to each other to maintain the program's operation.Get to know the
Native service is actually a Linux daemon, providing some services, but since the Android interprocess communication uses the binder mechanism, then we need to follow the Android rules to implement our Native service.The client uses a proxy class with the same interface when requesting service services. Native
9.3 Basic usage of the serviceAfter understanding the technology of Android multithreaded programming, let's go to the topic of this chapter and start learning about the content of the service. As one of the four components of Android, the service also has a lot of very important points of knowledge, we naturally have
In the previous series, we analyzed the implementation framework of the Android application window from an individual perspective. In fact, if we look at the overall point of view, the implementation of the Android application window is more complex, because they are of different types and roles, and they affect each other. In an Android system, managing all wind
purpose of inheriting the binder class is to return the object of this type in the Onbind method * * Implementation of Ireceptionist interface is required to expose the method */private class ServiceB Inder extends Binder implements Ireceptionist{public void Callextendsionnumber () {putextendsion ();} private void Othermethod () {}}}Operating effect:Notice that when we press the Back button, the activity is destroyed and the service initiated by it i
Reprint Please indicate this article from Big Corn's blog (http://blog.csdn.net/a396901990 ), thank you for your support! Opening nonsense:This project is prepared in four parts:One: Create rotatable "3D ball ":3D Voice Weather ball (source sharing)-- Create rotatable 3D ball second: Through the weather Service, from the network to obtain real weather information and dynamic generation "3D Ball ": 3D Voice Weather ball (source sharing)--create 3D ba
Android plug-in development-run the Service and androidapk that are not installed in the apkIf you do not know what plug-in development is, you should first read this blog: Android plug-in development.
The previous blog mainly analyzed several difficulties in Android plug-in development from the overall perspective and
Service is one of the four major components provided by the Android system. Its position is parallel with that of activity, but it is not frequently used by activity. As the name suggests, a service is a kind of service program running in the background. Generally, it rarely interacts with users. The biggest feature is
1 Service essential structure
We are still fromServiceStarting with the analysis of the fundamental significance of the service, the essence of the service is to respond to client requests. To provide services, you must establish a framework for receiving requests, processing requests, and responding to customer service
Android uses Messenger for Service IPC communication analysis, androidipc
If you want to perform IPC communication, write an AIDL interface and a Service subclass. Then, implement the AIDL interface and return it to the Activity interface layer as an IBinder.
If you do not want to write the AIDL interface file, but want to communicate with the
1. DescriptionAndroid background running in a lot of service, they are systemserver on when the system starts, support the normal operation of the system, such as Mountservice Monitoring for SD card installation and removal, Clipboardservice provides the Clipboard function, Packagemanagerservice provides installation removal and viewing of packages, and so on, applications can access the data provided by the servi
Abstraction Layer (HAL) module on Ubuntu to access the Linux kernel driver article and prepare the Hardware Abstraction Layer module to ensure that the Android system image file System.img already contains the Hello.default module.Two. Go to the Frameworks/base/services/jni directory and create a new Com_android_server_helloservice.cpp file:[email protected]:~/android$ cd Frameworks/base/services/jni[Email
Service of four Android Components
Among the four Android components, Service and Activity are similar. The difference is that Activity is used for the foreground, and Service is used for the background.
When your program does not need to use components to render the interfa
. The Android service component is not running in a separate process or thread, and it is running in the main thread of the application as well as other components, and if the service component performs a more time-consuming operation, it causes the main thread to block or feign death, thus unable to respond to the user's actions.② from the point of use:Service n
enables the client to communicate with the service. Public class myservicetest extends Activity { IBinder object for//serviceMyservice.mybinder Binder;//Define a Serviceconnection object PrivateServiceconnection conn =NewServiceconnection () {//callback when the activity and service connection is successful @Override Public void onserviceconnected(componentname name, IBinder
Android ServiceLearn about service-related knowledge points:android serviceBasic knowledge, life cycle, service classification, run location (local service, remote service), run type (foreground service, background
/cn.codingblock.androidadvancestudy I/myservice: I'm a time-consuming task, execution remaining time: 012-07 17:53:20.924 29898-30563/ Cn.codingblock.androidadvancestudy I/myintentservice: I'm a time-consuming task, execution remaining time: 012-07 17:53:21.830 29898-29898/ Cn.codingblock.androidadvancestudy i/servicetestactivity: I'm a time-consuming task, execution remaining time: 0From the log, the time-consuming tasks of starting a child thread in the normal
Service Discovery IntroductionIn Android Wifidirect Learning (a), a simple description of how to use Wifidirect for search-connect-transfer.The problem with this is that you will be searching all the nearby network devices that are in the Wifidirect search state, and these devices are not necessarily the one you want to connect to.The Android Wifidirect API provi
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