title: com.android.ide.common.process.ProcessException: Failed to execute aapt
body: <p>I'm migrated eclipse android project to android studio which has the <code>targetSdkVersion</code> 19. Now, I'm changed<code>targetSdkVersion</code> to 23. Now the problem is Gradle shows error after adding <code>com.android.support:appcompat-v7:23.0.1</code> into dependencies.</p>
  
  <pre><code>Information:Gradle tasks [:app:clean, :app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:mockableAndroidJar, :app:prepareDebugUnitTestDependencies, :app:assembleDebug]
  C:\Users\madhanhere\stories-android\app\build\intermediates\res\merged\debug\values\values.xml
  Error:(190) Attribute "theme" has already been defined
  Error:(190) Attribute "theme" has already been defined
  Error:Execution failed for task ':app:processDebugResources'.
  &gt; com.android.ide.common.process.ProcessException: Failed to execute aapt
  Information:BUILD FAILED
  </code></pre>
  
  <p>My app.gradle file:</p>
  
  <p>apply plugin: 'com.android.application'</p>
  
  <pre><code>android {
      compileSdkVersion 23
      buildToolsVersion "21.0.1"
      useLibrary  'org.apache.http.legacy'
  
      defaultConfig {
          applicationId "com.ebooks.stories"
          minSdkVersion 18
          targetSdkVersion 23
      }
  
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
          }
      }
  }
  
  dependencies {
      compile files('libs/core.jar')
      compile files('libs/logentries-android-2.1.2.jar')
      compile files('libs/picasso-2.2.0.jar')
      compile 'com.google.android.gms:play-services:5.+'
      compile 'com.facebook.android:facebook-android-sdk:3.+'
      compile 'com.android.support:appcompat-v7:23.0.1'
  }
  </code></pre>
  
  <p>values.xml file:</p>
  
  <pre><code>&lt;declare-styleable name="WalletFragmentOptions"&gt;&lt;attr format="enum" name="theme"&gt;
              &lt;enum name="holo_dark" value="0"/&gt;
              &lt;enum name="holo_light" value="1"/&gt;
          &lt;/attr&gt;&lt;attr format="enum" name="environment"&gt;
              &lt;enum name="production" value="1"/&gt;
              &lt;enum name="sandbox" value="0"/&gt;
              &lt;enum name="strict_sandbox" value="2"/&gt;
          &lt;/attr&gt;&lt;attr format="reference" name="fragmentStyle"/&gt;&lt;attr format="enum" name="fragmentMode"&gt;
              &lt;enum name="buyButton" value="1"/&gt;
              &lt;enum name="selectionDetails" value="2"/&gt;
          &lt;/attr&gt;&lt;/declare-styleable&gt;
  </code></pre>
  
  <p>How can I solve this any solution?</p>