title: ERROR: Package GooglePlayServicesClient does not exist
body: <p>I have added a login activity to my app with android studio however I am running into these errors:</p>
  
  <pre><code>Error:(11, 37) error: cannot find symbol class GooglePlayServicesClient
  
  Error:(13, 35) error: cannot find symbol class PlusClient
  
  Error:(20, 44) error: package GooglePlayServicesClient does not exist
  
  Error:(21, 33) error: package GooglePlayServicesClient does not exist
  
  Error:(35, 13) error: cannot find symbol class PlusClient
  
  Error:(279, 12) error: cannot find symbol class PlusClient
  
  Error:(78, 31) error: package PlusClient does not exist
  
  Error:(160, 65) error: package PlusClient does not exist
  
  Error:(239, 5) error: method does not override or implement a method from a supertype
  
  Error:(249, 5) error: method does not override or implement a method from a supertype
  
  Error:(262, 5) error: method does not override or implement a method from a supertype
  </code></pre>
  
  <p>I have already installed google play services in my SDK manager so I'm not sure why it's telling me the package doesn't exist.</p>
  
  <p>EDIT:
  Gradle file:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 22
      buildToolsVersion "22.0.1"
  
      defaultConfig {
          applicationId "com.example.tyler.titanaid"
          minSdkVersion 15
          targetSdkVersion 22
          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-v7:22.0.0'
      compile 'com.google.android.gms:play-services:7.0.0'
  }
  </code></pre>