title: Error:(2) Attribute "barLength" has already been defined
body: <p>In android getting <code>Error:(2) Attribute "barLength" has already been defined</code> Error.</p>
  
  <p><strong>this is Error code:</strong></p>
  
  <pre><code>abc:processDebugResources  
  /home/abc/piyush/project/plutochat/20-10-15/abc_ANDROID   
  STUDIO/abc/src/main/res/values/colors.xml
  
  Error:(2) Attribute "barLength" has already been defined
  
  /home/abc/piyush/project/abc/20-10-15/abc_ANDROID STUDIO/abc/build/intermediates/exploded-aar/com.android.support/appcompat-v7/23.0.0/res/values-v23/values-v23.xml
  
  Error:(2) Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.Button.Inverse'.
  Error:(2) Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.Button.Colored'.
  
  Error:Execution failed for task ':abc:processDebugResources'.
   com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/home/abcAndroid/Sdk/build-tools/21.1.2/aapt'' finished with non-zero exit value 1
  Information:BUILD FAILED
  Information:Total time: 4.675 secs
  </code></pre>
  
  <p><strong>manifest.xml file code :</strong></p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 21
      buildToolsVersion "21.1.2"
  
      defaultConfig {
          multiDexEnabled true
          applicationId "com.abcd.beta"
          minSdkVersion 15
          targetSdkVersion 21
  
      }
  
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
          }
      }
  
      packagingOptions {
          exclude 'META-INF/DEPENDENCIES'
          exclude 'META-INF/NOTICE'
          exclude 'META-INF/LICENSE'
          exclude 'META-INF/LICENSE.txt'
          exclude 'META-INF/NOTICE.txt'
  
      }
  
  }
  
  dependencies {
      //compile fileTree(include: ['*.jar'], dir: 'libs')
      compile project(':facebookSDK')
      compile project(':lib')
      compile 'com.android.support:support-v4:21.0.3'
      compile 'it.neokree:MaterialNavigationDrawer:1.3.2'
      compile 'com.google.android.gms:play-services:+'
      compile 'com.android.support:appcompat-v7:21.0.3'
      compile 'com.paypal.sdk:paypal-android-sdk:2.13.1'
      compile files('libs/Shutterbug-1.0.0.jar')
      compile files('libs/httpclient-4.3.6.jar')
      compile files('libs/httpcore-4.3.3.jar')
      compile files('libs/httpmime-4.3.6.jar')
      compile files('libs/universal-image-loader-1.9.3.jar')
      compile files('libs/sinch-android-rtc-3.7.1.jar')
  }
  </code></pre>