title: android - proguard error in android studio
body: <p>I want to use proguard for my application ,I enabled it but when I want to generate apk file ,it gives me this error:</p>
  
  <pre><code>    Information:Gradle tasks [:app:assembleRelease]
  :app:preBuild UP-TO-DATE
  :app:preReleaseBuild UP-TO-DATE
  :app:checkReleaseManifest
  :app:preDebugBuild UP-TO-DATE
  :app:prepareComAndroidSupportAppcompatV72300Library UP-TO-DATE
  :app:prepareComAndroidSupportCardviewV72300Library UP-TO-DATE
  :app:prepareComAndroidSupportDesign2300Library UP-TO-DATE
  :app:prepareComAndroidSupportRecyclerviewV72300Library UP-TO-DATE
  :app:prepareComAndroidSupportSupportV42300Library UP-TO-DATE
  :app:prepareJpWasabeefRecyclerviewAnimators122Library UP-TO-DATE
  :app:prepareReleaseDependencies
  :app:compileReleaseAidl UP-TO-DATE
  :app:compileReleaseRenderscript UP-TO-DATE
  :app:generateReleaseBuildConfig UP-TO-DATE
  :app:generateReleaseAssets UP-TO-DATE
  :app:mergeReleaseAssets UP-TO-DATE
  :app:generateReleaseResValues UP-TO-DATE
  :app:generateReleaseResources UP-TO-DATE
  :app:mergeReleaseResources UP-TO-DATE
  :app:processReleaseManifest UP-TO-DATE
  :app:processReleaseResources UP-TO-DATE
  :app:generateReleaseSources UP-TO-DATE
  :app:processReleaseJavaRes UP-TO-DATE
  :app:compileReleaseJava UP-TO-DATE
  :app:compileReleaseNdk UP-TO-DATE
  :app:compileReleaseSources UP-TO-DATE
  :app:lintVitalRelease
  :app:proguardRelease
  Note: there were 7 duplicate class definitions.
        (http://proguard.sourceforge.net/manual/troubleshooting.html#duplicateclass)
  Warning:library class org.apache.http.conn.scheme.LayeredSocketFactory extends or implements program class org.apache.http.conn.scheme.SocketFactory
  Warning:org.acra.ErrorReporter: can't find referenced method 'void setLatestEventInfo(android.content.Context,java.lang.CharSequence,java.lang.CharSequence,android.app.PendingIntent)' in library class android.app.Notification
  Warning:library class android.webkit.WebView depends on program class android.net.http.SslCertificate
  Warning:library class org.apache.http.conn.ssl.SSLSocketFactory depends on program class org.apache.http.conn.scheme.HostNameResolver
  Warning:library class org.apache.http.conn.ssl.SSLSocketFactory depends on program class org.apache.http.params.HttpParams
  Warning:library class org.apache.http.params.HttpConnectionParams depends on program class org.apache.http.params.HttpParams
  Warning:there were 17 instances of library classes depending on program classes.
           You must avoid such dependencies, since the program classes will
           be processed, while the library classes will remain unchanged.
           (http://proguard.sourceforge.net/manual/troubleshooting.html#dependency)
  Warning:there were 1 unresolved references to library class members.
           You probably need to update the library versions.
           (http://proguard.sourceforge.net/manual/troubleshooting.html#unresolvedlibraryclassmember)
  :app:proguardRelease FAILED
  Error:Execution failed for task ':app:proguardRelease'.
  &gt; java.io.IOException: Please correct the above warnings first.
  </code></pre>
  
  <p>I'm using the latest version of sdk 23 , this is my gradle file :</p>
  
  <pre><code>    apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 23
      buildToolsVersion '23.0.0'
  
      defaultConfig {
          applicationId "com.x.x"
          minSdkVersion 11
          targetSdkVersion 23
      }
  
      buildTypes {
          release {
              minifyEnabled true
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
          }
      }
  }
  
  
  
  dependencies {
      compile 'com.android.support:appcompat-v7:23.0.0'
      compile 'com.android.support:recyclerview-v7:23.0.0'
      compile files('libs/acra-4.5.0.jar')
      compile files('libs/universal-image-loader-1.8.4-with-sources.jar')
      compile files('libs/org.apache.http.legacy.jar')
      compile 'com.android.support:cardview-v7:23.0.0'
      compile 'jp.wasabeef:recyclerview-animators:1.2.2'
      compile 'com.android.support:design:23.0.0'
  }
  </code></pre>
  
  <p>What is wrong ? where I do wrong in this code?</p>
  
  <p>thanks </p>