SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”

pop.xml

<dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
       <version>1.7.5</version>
 </dependency>
 <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-log4j12</artifactId>
       <version>1.7.5</version>
 </dependency>

android-studio build.gradle

compile 'org.slf4j:slf4j-api:1.7.20'
compile 'org.slf4j:slf4j-log4j12:1.7.5'

如果出現：No appenders could be found for logger(log4j)

在主方法最前面加上下面一行代碼：

BasicConfigurator.configure();