Introduction to advanced functions and technical principles in the logback Android framework

Logback Android is a log record framework for the Android project. It is an Android version of the Logback log framework.In addition to the basic log record function, Logback Android also provides many senior functions and technical principles. 1. Advanced function introduction: 1. Asynchronous log records: Logback Android uses AsynChronous Loggers to implement asynchronous log records.It allows logs to record in the background thread, so as not to block the execution of the main thread.This can improve the performance and response speed of the application. LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory(); ch.qos.logback.classic.AsyncAppender asyncAppender = new ch.qos.logback.classic.AsyncAppender(); asyncAppender.setContext(loggerContext); asyncAppender.setName("ASYNC_APPENDER_NAME"); asyncAppender.setQueueSize(500); asyncAppender.setDiscardingThreshold(0); asyncAppender.addAppender(appender); Logger logger = (Logger)LoggerFactory.getLogger("logger-name"); logger.addAppender(asyncAppender); 2. Multiple APPENDER: Logback Android allows recording logs to multiple APENDER, so that the log can be exported to multiple destinations such as console and files at the same time. LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory(); Logger logger = (Logger)LoggerFactory.getLogger("logger-name"); ConsoleAppender<ILoggingEvent> consoleAppender = new ConsoleAppender<>(); consoleAppender.setContext(loggerContext); consoleAppender.setName("CONSOLE_APPENDER_NAME"); FileAppender<ILoggingEvent> fileAppender = new FileAppender<>(); fileAppender.setContext(loggerContext); fileAppender.setName("FILE_APPENDER_NAME"); fileAppender.setFile("log.txt"); logger.addAppender(consoleAppender); logger.addAppender(fileAppender); 3. Filter: LOGBACK android provides multiple filters to control the conditions of logging.For example, using the LevelFilter filter can only record the logs of a specific level. Logger logger = (Logger)LoggerFactory.getLogger("logger-name"); LevelFilter levelFilter = new LevelFilter(); levelFilter.setLevel(Level.INFO); levelFilter.setContext(loggerContext); levelFilter.setOnMatch(FilterReply.ACCEPT); levelFilter.setOnMismatch(FilterReply.DENY); logger.addAppender(appender); logger.addFilter(levelFilter); Introduction of technical principles: 1. Use Android's log class: In logback android, the log record is implemented through the Android log class.Logback Android is configured based on the Logback mode selection and filter, and forwards logging operations to Android LOG classes. 2. Use Android's Asynctask: Logback android using Android's Asynctask class to achieve asynchronous log records.The Asynctask class allows asynchronous tasks to perform asynchronous tasks in background threads, thereby avoiding the effects of performing logging operations on the application performance and response speed in the main thread. The above is the introduction of some advanced functions and technical principles in the LogBack Android framework. They make logback android a powerful and flexible configuration logging framework.By using these advanced functions, developers can better manage and control log records of Android applications.