title: Gradle failed to find library
body: <p>Am using android studio. Have the following dependencies. Gradle fails to find the third party libraries volley and square but DOES find appcompat:</p>
  
  <pre><code>compile 'com.android.support:appcompat-v7:21.0.3'
  compile 'com.mcxiaoke.volley:library:1.0.+@aar'
  compile 'com.squareup.phrase:phrase:1.0.3'
  </code></pre>
  
  <p>.</p>
  
  <pre><code>Error:Failed to find: com.mcxiaoke.volley:library:1.0.+
  </code></pre>
  
  <p>I have updated Android SDK Manager tools and Extras including support library but still no luck. I have tried both with jcenter() and mavenCentral(). Can anyone help ?</p>
  
  <p><code>build.gradle</code>:</p>
  
  <pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  buildscript {
      repositories {
          jcenter()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:1.0.0'
  
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          jcenter()
      }
      dependencies{
  
      }
  }
  </code></pre>
  
  <p><code>app/build.gradle</code>:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 21
      buildToolsVersion "21.1.2"
  
      defaultConfig {
          applicationId "com.example.tap"
          minSdkVersion 8
          targetSdkVersion 21
          versionCode 1
          versionName "1.0"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      compile 'com.android.support:appcompat-v7:21.0.3'
      compile 'com.mcxiaoke.volley:library:1.0.+@aar'
      compile 'com.squareup.phrase:phrase:1.0.3'
  }
  </code></pre>
  
  <p><code>settings.gradle</code>:</p>
  
  <pre><code>include ':app'
  </code></pre>