title: Not able to compile exoplayer in Android Studio
body: <p>I have imported exoplayer using jcenter but am getting error as :
  Error:(46, 13) Failed to resolve:   com.google.android.exoplayer:exoplayer:r2.3.0
  Following is my code of gradles:</p>
  
  <h2>build.gradle(Project)</h2>
  
  <pre><code>buildscript{
  repositories {
      jcenter()
     /* mavenCentral()*/
  }
  dependencies{
    classpath 'com.android.tools.build:gradle:2.2.3'
    classpath 'com.android.tools.build:gradle:1.0.0-rc1'
   // NOTE: Do not place your application dependencies here; they belong
   // in the individual module build.gradle files
  }}allprojects {
  repositories {
      jcenter()
      mavenCentral()
  }
  }
  task clean(type: Delete)
  {
   delete rootProject.buildDir
  }
  </code></pre>
  
  <h2>build.gradle(Module)</h2>
  
  <pre><code>apply plugin: 'com.android.application'
  android {
  compileSdkVersion 25
  buildToolsVersion "25.0.2"
  defaultConfig {
      applicationId "com.example.pash.dr"
      minSdkVersion 15
      targetSdkVersion 25
      versionCode 1
      versionName "1.0"
      testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  
  }buildTypes {
      release {
          minifyEnabled false
          proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
      }
  }} 
   repositories {
       jcenter()
    mavenCentral()
  }
  dependencies
  {
  compile fileTree(include: ['*.jar'], dir: 'libs')
  androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
      exclude group: 'com.android.support', module: 'support-annotations'
  })
  compile 'com.android.support:appcompat-v7:25.3.0'
  compile 'com.android.support:design:25.3.0'
  compile 'com.android.support:recyclerview-v7:23.3.+'
  compile 'com.android.support:cardview-v7:23.3.+'
  testCompile 'junit:junit:4.12'
  compile 'com.github.bumptech.glide:glide:3.7.0'
  compile 'com.squareup.picasso:picasso:2.5.2'
  /** *************For player ***************/
  compile 'com.android.support:support-v4:21.0.3'
  compile 'com.nineoldandroids:library:2.4.0'
  compile 'com.daimajia.slider:library:1.1.5@aar'
  compile 'com.google.android.exoplayer:exoplayer:r2.3.0'
  }
  </code></pre>
  
  <p>Please guide me. Thank you in advance.</p>