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How to summarize the function of Android Service, I believe that many inexperienced people are at a loss about it. Therefore, this article summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

Here to introduce Android Service, many people may not understand the various features of Android Service services, it does not matter, after reading this article you must have a lot of gains, mastering the Android Service service will make our programming work easier and easier.

A common example: media player plays music from a playlist, and the player has some activities to ask the user to select a song and start playing. However, playback itself does not require activity processing, because the user wants the song to continue to play after activity is turned off.

So media player's activity starts a service. When the user leaves the form, the system can also keep the song playing. You can communicate with a running service or start a service. Communication with service depends on the interface exposed by service. For example, for music playback, the interface may allow users to pause, start, stop, and resume playlists.

Like activities and other components, Android Service runs on the main thread of the application. So they don't block other components or user interfaces. You can enable another thread in the service to do time-consuming work, such as music playback. See Processes and Threads.

Broadcast receivers

Android Service is a component that receives and processes broadcast notifications (broadcast announcements). Most broadcasts are system-initiated. Such as geographical changes, insufficient battery power, picture acquisition, language conversion. Programs can also initialize a broadcast, such as letting other programs know that some of the data they need has been downloaded. (note: notification broadcast is an event)

A program can have any number of broadcast receivers corresponding to notifications it feels important. All receivers inherits from the BroadcastReceiver class. Broadcast receivers will not display the user interface, but they may launch an activity to respond to the notification received.

Or use NotificationManager to notify the user. Users can be notified in a variety of ways-turning on background lights, vibrating devices, playing sound, and so on. The most typical is to display an icon in the status bar so that the user can click it to open the notification content.

Content providers

Android Service creates datasets used by other programs. The data can be stored in the system's SQLite database or elsewhere. Content provider inherits from the ContentProvider class.

Implement a set of standard methods to enable other programs to access data. However, instead of calling these methods directly, the program uses the ContentResolver object to call them. The role of ContentResolve is to manage the multi-process interaction between provider and programs.

As long as there is a need to call a specific component, Android needs to ensure that the component's program process is running, and if the component's thread is not started, start the required process. If the required component is not initialized, Android initializes it as well.

Content providers is activated when ContentResolver initiates a request. The other three components-activities, services, and broadcast receivers-are activated by asynchronous messages called intents. Intent is an Intent object that holds the message information. For activities and services, it transmits the requested data and a specific URI.

For example, it might convey a request called activity to render a picture or ask the user to edit a piece of text. The act of sending a notification for a broadcast receivers,Internt object. For example, it may notify the camera that the button is pressed.

After reading the above, have you mastered how to summarize the function of Android Service? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!

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