title: How to solve this : occurred evaluating project :app
body: <p>when I use vlc-android-demo-master on the Android Studio,This problem happened:</p>
  
  <pre><code>Error:(16, 1) A problem occurred evaluating project ':app'.
  </code></pre>
  
  <blockquote>
    <p>Could not find method runProguard() for arguments [false] on BuildType_Decorated{name=release, debuggable=false, testCoverageEnabled=false, jniDebuggable=false, pseudoLocalesEnabled=false, renderscriptDebuggable=false, renderscriptOptimLevel=3, minifyEnabled=false, zipAlignEnabled=true, signingConfig=null, embedMicroApp=true, mBuildConfigFields={}, mResValues={}, mProguardFiles=[], mConsumerProguardFiles=[], mManifestPlaceholders={}} of type com.android.build.gradle.internal.dsl.BuildType.</p>
  </blockquote>
  
  <p>But I don't know how it is produced, and how to solve.But I think this may be related to gradle.this is my build.gradle code.</p>
  
  <pre><code>apply plugin: 'android'
  
  android {
  compileSdkVersion 19
  buildToolsVersion "19.1.0"
  
  defaultConfig {
      applicationId "com.nmbb.vlc"
      minSdkVersion 9
      targetSdkVersion 19
      versionCode 1
      versionName "1.0"
  }
  buildTypes {
      release {
          runProguard false
          proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
      }
  }
  
  
  }
  
  
  dependencies {
  compile fileTree(dir: 'libs', include: ['*.jar'])
  compile 'com.android.support:appcompat-v7:19.1.0'
  }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/Im95W.png" rel="nofollow noreferrer">demo</a></p>
  
  <p><a href="https://i.stack.imgur.com/29GCM.png" rel="nofollow noreferrer">error</a></p>