title: Program type already present: org.slf4j.impl.StaticMDCBinder
body: <p>I am new developing Android Apps, I'm trying to run an application but I receive this error</p>
  
  <pre><code>E/AndroidRuntime: FATAL EXCEPTION: main
          java.lang.ExceptionInInitializerError
              at app.unityudx.io.new_app.process.UnityApplication.onCreate(UnityApplication.java:59)
              at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:999)
              at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4151)
              at android.app.ActivityThread.access$1300(ActivityThread.java:130)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1255)
              at android.os.Handler.dispatchMessage(Handler.java:99)
              at android.os.Looper.loop(Looper.java:137)
              at android.app.ActivityThread.main(ActivityThread.java:4745)
              at java.lang.reflect.Method.invokeNative(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:511)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
              at dalvik.system.NativeStart.main(Native Method)
           Caused by: java.lang.NoClassDefFoundError: org.slf4j.helpers.SubstituteLoggerFactory
              at org.slf4j.LoggerFactory.&lt;clinit&gt;(LoggerFactory.java:86)
              at app.unityudx.io.new_app.process.UnityApplication.onCreate(UnityApplication.java:59) 
              at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:999) 
              at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4151) 
              at android.app.ActivityThread.access$1300(ActivityThread.java:130) 
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1255) 
              at android.os.Handler.dispatchMessage(Handler.java:99) 
              at android.os.Looper.loop(Looper.java:137) 
              at android.app.ActivityThread.main(ActivityThread.java:4745) 
              at java.lang.reflect.Method.invokeNative(Native Method) 
              at java.lang.reflect.Method.invoke(Method.java:511) 
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
              at dalvik.system.NativeStart.main(Native Method) 
  </code></pre>
  
  <p>I researched, and people in internet say that the class is not in Classpath, but when I add <code>implementation 'org.slf4j:slf4j-android:1.7.25'</code> in graddle this error present</p>
  
  <pre><code>Program type already present: org.slf4j.impl.StaticMDCBinder
  </code></pre>
  
  <p>Android Studio is 3.1.2</p>