title: Android Studio - ProGuard "java.io.IOException ...bin\classes (No such file or directory)"
body: <p>So I am running ProGuard for the first time and I am getting a weird error:</p>
  
  <pre><code>FAILURE: Build failed with an exception.
  
  * What went wrong:
  Execution failed for task ':app:proguardRelease'.
  &gt; java.io.IOException: Can't read [C:\Users\Some\workspace\MyApp\app\bin\classes] (No such file or directory)
  
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  </code></pre>
  
  <p>Here is my gradle:</p>
  
  <pre><code>apply plugin: 'android'
  
  android {
      compileSdkVersion 19
      buildToolsVersion '19.1.0'
  
      defaultConfig {
          minSdkVersion 16
          targetSdkVersion 19
          versionCode 1
          versionName "1.0"
      }
      buildTypes {
          release {
              runProguard true
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
          }
      }
  }
  
  dependencies {
      compile 'com.android.support:support-v4:19.0.+'
      compile 'com.google.android.gms:play-services:4.3.23'
      compile fileTree(dir: 'libs', include: ['*.jar'])
      compile 'com.viewpagerindicator:library:2.4.1@aar'
      compile group:'com.android.support', name:'appcompat-v7', version:'18.0.+'
      compile 'com.squareup.picasso:picasso:2.3+'
      compile 'com.github.castorflex.smoothprogressbar:library:0.4.0'
  }
  
  allprojects {
      gradle.projectsEvaluated {
          tasks.withType(JavaCompile) {
              options.compilerArgs &lt;&lt; "-Xlint:unchecked" &lt;&lt; "-Xlint:deprecation"
          }
      }
  }
  </code></pre>
  
  <p>my proguard-rules.txt:</p>
  
  <pre><code>-injars      bin/classes
  -injars      libs
  -outjars     bin/classes-processed.jar
  -libraryjars /usr/local/java/android-sdk/platforms/android-9/android.jar
  
  -dontpreverify
  -repackageclasses ''
  -allowaccessmodification
  -optimizations !code/simplification/arithmetic
  -keepattributes *Annotation*
  
  -keep public class * extends android.app.Activity
  -keep public class * extends android.app.Application
  -keep public class * extends android.app.Service
  -keep public class * extends android.content.BroadcastReceiver
  -keep public class * extends android.content.ContentProvider
  
  -keep public class * extends android.view.View {
      public &lt;init&gt;(android.content.Context);
      public &lt;init&gt;(android.content.Context, android.util.AttributeSet);
      public &lt;init&gt;(android.content.Context, android.util.AttributeSet, int);
      public void set*(...);
  }
  
  -keepclasseswithmembers class * {
      public &lt;init&gt;(android.content.Context, android.util.AttributeSet);
  }
  
  -keepclasseswithmembers class * {
      public &lt;init&gt;(android.content.Context, android.util.AttributeSet, int);
  }
  
  -keepclassmembers class * extends android.content.Context {
     public void *(android.view.View);
     public void *(android.view.MenuItem);
  }
  
  -keepclassmembers class * implements android.os.Parcelable {
      static ** CREATOR;
  }
  
  -keepclassmembers class **.R$* {
      public static &lt;fields&gt;;
  }
  
  -keepclassmembers class * {
      @android.webkit.JavascriptInterface &lt;methods&gt;;
  }
  </code></pre>