LOGBACK Android technical principles and working principles detailed explanation

LOGBACK is a functional and flexible log framework that is widely used in Android development.It is efficient, easy to configure, and provides a series of powerful log processing functions.This article will introduce the technical principles and working principles of logback android. 1. Technical principle: LOGBACK Android is a transplant version based on LOGBACK Classic. It mainly uses the underlying mechanism of Android to implement log records.Logback Android is basically the same as the ordinary Java version of Logback, but it is different in implementation. The bottom layer of logback android uses Android's system log API.The Android platform provides a LOG class that can be used to record log messages.LOGBACK Android provides a more powerful and flexible log record function using the API.By using LogBack Android, developers can use the basic concepts and classes of logback in applications, such as logger, APPENDER, and Layout. 2. Working principle: The working principle of logback android can be explained through the following steps: Step 1: Logger configuration In the application, the logger is first configured to specify the log level and log output target (such as files, consoles, etc.) to be recorded.This configuration can be performed in the initialization stage of the application. Logger logger = (Logger)LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME); logger.setLevel(Level.DEBUG); Step 2: Appender configuration APPENDER is a component of specified log output targets. Logback Android provides multiple types of APENDER, such as ConsoleAppEnder, FileAPPENDER, and LOGCATAPENDER. ConsoleAppender consoleAppender = new ConsoleAppender(); consoleAppender.setContext(logger.getLoggerContext()); consoleAppender.setName("console"); PatternLayoutEncoder encoder = new PatternLayoutEncoder(); encoder.setPattern("%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n"); encoder.setContext(logger.getLoggerContext()); encoder.start(); consoleAppender.setEncoder(encoder); consoleAppender.start(); logger.addAppender(consoleAppender); Step 3: Logging Wherever the application, you can use the Logger object to record the log message.By specifying the log level, the log filtering and control can be achieved. logger.debug("This is a debug level log message"); logger.info("This is an info level log message"); logger.warn("This is a warning level log message"); logger.error("This is an error level log message"); Step 4: log output LOGBACK Android will output log messages into the corresponding goals based on the configuration APPENDER.By default, logback android will output logs into logcats. Developers can select different APPENDER to achieve specific log output. In summary, the working principle of LogBack Android mainly includes the steps of Logger's configuration, APENDER configuration, log records, and log output.Developers can be flexibly configured and used according to the needs of the project. Summarize: LOGBACK Android is a widely used log frame in Android development. It uses Android underlying mechanism to implement log records.The working principle of Logback Android includes the steps of Logger, the configuration of APENDER, the record of the log, and the output of the log.Through reasonable configuration, developers can achieve efficient, flexible and powerful log records and management.