looper book

Calls in the thread containing the creation of the handler method, will be an error, prompt:"Need call Looper.prepare ()"--before creating, invoke the Looper.prepare () method to create a LooperHowever, the method that contains the create handler may be called in the main thread or in a child thread.When called in the main thread, you add the Looper.prepare () method to it, it may error, prompt:"Only one Looper can be created per thread"--within each

ThreadLocalBefore looking down, you need to know about Java's threadlocal class, you can refer to the blog:Decryption threadlocalLooper, Handler and MessageQueueLet's analyze the previous code and see what the relationship between Handle, Looper, and MessageQueue is in the handler mechanism. Packagecn.lixyz.handlertest;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.os.Handler;ImportAndroid.os.Looper;ImportAndroid.os.Message;ImportAnd

) {TODO auto-generated Method StubMworkhandler.sendemptymessage (Download_start);}});}private void Createworkhandler () {TODO auto-generated Method StubNew Thread () {public void Run () {Looper.prepare ();//Create Looper objects and MessageQueue in worker threadsMworkhandler = new Handler () {public void Handlemessage (Message msg) {if (Msg.what==download_start) {for (int i=0;iSystemclock.sleep (2000);Pbdownload.setprogress (i);Message MSG1 = new Mess

This class of users runs the message loop in a thread. The thread does not have a message loop by default, and you can call prepare () to create a run loop in the threads, and then call Loop () to process the message until the loop endsMost of the message loop interactions are through the handler class;Class Looperthread extends thread{Public Handler handler;//Create Handler object in threadpublic void Run () {Looper.prepare ();//The thread must be created atHandler=new handler () {public void H

Direct Sticker CodeMsgthread.javaPackage Bb.aa.looperdemo;import Android.os.handler;import android.os.looper;import android.os.message;import Android.util.Log; Public classMsgthread extends thread{ Public StaticFinal String TAG ="Msgthread"; PublicHandler _handler =NULL; @Override Public voidrun () {LOG.D (TAG,"Enter the thread's run"); Looper.prepare ();//_handler = new Handler (Looper.getmainlooper ()) {_handler =NewHandler (Looper.mylooper ()) {@Override Public voidhandlemessage (Message msg

Book inventory plays an important key business data for warehouse management operations in books. Development at any age now promotes blood circulation in books, book types and update speed are just as fast rising.In order to ensure a foothold in the book industry, to ensure the correct purchase and inventory control and delivery. In order to avoid the backlog of

IOS Address Book programming, listening for system address book changes, and ios address book Listen for address book changes The client code must be implemented as follows: /* Remove the registration function */-(void) dealloc {ABAddressBookUnregisterExternalChangeCallback (_ addressBook, ContactsChangeCallback, nil)

My previous question stopped for a long time because-I went to write a book.ObjectiveI started working in March 2012 and now I'm six years away. For the past six years, I have never known anything about SQL Server, only the simplest C # programmers have started, stepping back from a nameless outsourcing company to the middle of a larger financial institution, with wages rising to nearly four times times the size of a new job. In the process of struggle, I also go a lot of detours, once very depr

Write in frontThanks to all the friends who came in to see. Yes, I'm currently going to write a book about unity shader.The purpose of the book is to have the following several: Summarize my experience with unity Shader and give others a reference. I am very aware of the difficulties of learning shader, and I have seen many questions raised by people in the group. I think learning shader is still a

Gitbook set up local book 1, do not login, click Do this later2, click New book–> Enter book name –>confirm3, the path of the book4. Book Display5, Release6, import others book error and introduction7, related documents ———————————————————————- 1, do not login, click Do thi

Write in frontThanks to all the friends who came in to see. Yes, I'm currently going to write a book about unity shader.The purpose of the book is to have the following several: Summarize my experience with unity Shader and give others a reference. I am very aware of the difficulties of learning shader, and I have seen many questions raised by people in the group. I think learning shader is still a

Address: http://calibre-ebook.com/user_manual/conversion.html#convert-microsoft-word-documents The calibre conversion system is designed to be very easy to use. Generally, you only need to add a book to calibre and click convert. calibre will generate output as close as possible to the input. However, calibre accepts many input formats, but not all of them are suitable for conversion to other formats of e-books. In this case, for these input formats

First put a picture, this is the end of the road book display effect 1, demand--2, solutions--3, implementation Method--4, subsequent expansion 1. Demand Demand is probably like, to achieve the progress of the book play, you can forward back, pause, when the mouse hover trolley display location information (callout) Subsequent (playback speed modification) 2, solve the idea The original idea: I threw a bu

The interface for accessing the address book and a single contact data is a C-language function that transmits references to various objects in the address book as parameters. The base class object for managing entries in the address book is abrecord. An abrecord can represent a person or a group of abgroups. Whenever you select a record on the interface or use t