multimedia message android

Android Message Processing source code Analysis (1)In Android, the code for Message Queuing that is commonly used is under directory \sources\android-22\android\os and involves the following classes of filesHandler.javaLooper.java

(Runnable R) method of the handler object to remove the thread object from the thread queue and cause the thread to stop executing.Handler provides an asynchronous message processing mechanism for Android that returns immediately after a message is sent to the message queue (sendMessage) and blocks when a

Message: messages, which contain message IDs, message processing objects, and processed data, are unified by MessageQueue, and eventually handled by handler. Handler: Processor, responsible for message delivery and processing. When using handler, you need to implement the Handlemessage (

Android development: Message Mechanism Overview A few days ago, I discussed the message mechanism in Android with my colleagues and explored the message sending and receiving processes and the relationship with threads. Although we often use these basic things, our understan

In our common systems, the program usually works in two ways: event-driven and message-driven. In Android systems, Java applications work by message-driven. The message-driven principle is:1. There is a message queue that can deliver messages to this queue;2. There is a

Speaking of handler in Android, let's first talk about the mechanism and principle of handler.1. Handler mechanism Principle Handler:It is mainly used to process sending and receiving messages. It is used to add messages to a specific logoff message queue and distribute and process messages in the queue. You can specify a logoff object when constructing a handler,Through the handler object, we can encapsul

Preparing to write something is a record/Note for yourself to read the source code, and hope to be helpful to people of the same interest. Stick to it, hey. In Android development, we often use the Handler. postXXX method or the View. postXXX method for the next logoff. Execute when it comes. I am such a person, and it is best to know what internal implementation mechanism is, otherwise I may feel uncomfortable when using it, Or it is not natural and

It's a work record ...First of all, the update of the interface in Android must be done in the middle of the main thread, and when we want to update the interface in the sub-thread, we can handle it through the two classes of handler and message. For example, a new thread has been opened for downloading tasks, displaying progress bars through handler, and so on. The approximate process is that you first get

Windows programmers may know that Windows programs are message-driven and have a global message loop system. Android applications are message-driven, and the message loop mechanism should also be provided. Android uses logoff and

Objective:The previous article is about bitmap and memory optimization technology, this article to everyone talk about handler.Handler is an important knowledge of the Android system, which is often asked in Android multithreaded interviews and is often used in real-world projects. Of course, more complex, more knowledge, involved in the class has thread, Looper, Messag