looper vst

Turn http://www.iteye.com/problems/69457When the activity starts, clicking on an interface button opens a service (tentatively Padservice), and a thread (tentatively Thread-3) initiates a socket connection in Padservice. Our project uses Mina as the socket communication framework, the comrades who have used Mina should be familiar with, Thread-3 is only responsible for monitoring, the specific message processing is another thread. The problem with handling messages in our Iohandler is that I nee

Recently approached a more challenging project, I found that the use of a large number of message mechanisms, and now this blog I want to specifically analyze: What is the message of Android, what is the message mechanism in the end what good?Actually speaking of Android message mechanism, we may soon think of message/handle/looper these three objects, yes, in Android is through the three objects to implement the message mechanism. So what I want to a

empty message. 6, Final Boolean sendemptymessagedelayed (int what,long delaymills): Specifies how many milliseconds to send empty messages. 7. Final Boolean SendMessage (msg): Send a message now. 8. Final Boolean sendmessagedelayed (Message Msg,long delaymillis): Specifies how many milliseconds to send messages. Using the above methods, the program can easily use the handler class for message delivery. Working principle of Handler, Loop and MessageQueue To better understand how handler wo

Handlerthread is a special thread, that is, looper thread, since there is looper, then we can use this looper toCreate a handler to interact with it, such as you can send a message to it in the UI thread through the handler object associated with it. HandlerthreadIt is generally possible to perform certain background operations, such as reading and writing files

the new message (), but Android recommends that we pass Message.obtain () or handler.obtainmessage () Gets the message object. This is not necessarily a direct creation of a new instance, but rather a message from the pool to see if there are any instances of messages available, and the existence is directly removed and returned to this instance. Conversely, if there is no message instance available in the messages pool, a new one is given based on the parameter. By analyzing the source, the An

If you're deciding whether a thread is the main line in Android? For this question, you might say that according to the thread's name, of course this solves the problem, but is it the most reliable? In case one day, Google will be the thread of the name of the other god horse things. Method revealed The following approach is the most reliable solution. Copy Code code as follows: public static Boolean Isinmainthread () { return Looper.mylooper () = = Looper.getmainlooper ();

I. OverviewHandler, Looper, and messages are all related to the Android asynchronous message processing thread. So what is called an asynchronous message processing thread?After the asynchronous message processing thread starts, it enters an infinite loop body, takes one message out of its internal message queue, and then recalls the corresponding message handler function, and then continues the loop after executing a message. If the message queue is

without blocking the main thread, but only one request can be processed at the same time.After knowing the instructions of Intentservice, we continue to look at the code, first look at the definition of Intentservice member variables, the code is as follows:Provides Message Queuing and private volatile Looper mservicelooper;//processing messages private volatile Servicehandler mservicehandler;// Represents the worker thread's name private String mnam

= =null) {Smainthreadhandler =Thread.gethandler (); } if (false) {Looper.mylooper (). setmessagelogging (New Logprinter (Log.debug, "Activitythread")); }//End of event Activitythreadmain.trace.traceend (Trace.trace_tag_activity_manager); Looper.loop ();throw new RuntimeException ("Main thread loop unexpectedly exited"); }In the above code, the red part of the code before the main use for the environment initialization, androidkeystoreprovider installation, etc., here do not focus on the descrip

Handler1. Why use handlerAfter Android4.0, Google is considering the use of the system and the user experience, if you do some time-consuming operations, do not allow directly in the main thread, but to send a message object by handler method to modify the main thread UI interface2.Handler Principle IntroductionIn all UI interfaces, a dead loop (Looper) is being executed to receive and listen to the instructions from the user, but once the instruction

In the previous article, we talked about the method of calling handler in the SendMessage, and eventually we would go into a way called Sendmessageattime, as follows: public boolean sendmessageattime (Message msg, long Uptimemillis) { MessageQueue queue = mqueue; if (queue = = null) { runtimeexception e = new RuntimeException (this + "sendmessageattime () called with no Mqueue "); LOG.W ("Looper