You need to install bridges to SLF4J from whatever logging implementations are in use by your third-party libraries. See http://www.slf4j.org/legacy.html From: Logback-user [mailto:logback-user-bounces@qos.ch] On Behalf Of Money Dai Sent: Monday, August 24, 2015 7:06 AM To: logback-user@qos.ch Subject: [logback-user] Turn the log of android spring to debug Hi all, I have a Android project which is using logback+slf4j. I am able to get the logs of the my classes, which have slf4j loggers. But is it possible to enable the debug log for the 3-party library. Specifically, I want to turn the log of android spring to debug. I tried the configuration as below but it does not work: <appender name="file" class="ch.qos.logback.core.FileAppender"> <file>/data/data/com.example/files/log/foo.log</file> <encoder> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <logger name="org.springframework" level="DEBUG" additivity="false"> <appender-ref ref="file" /> </logger> Any advice? -- Best regards, Jinge Dai