title: What version of support library is installed in my Android Studio
body: <p>I tried to add a <code>CardView</code> in my app so I added the following dependency in my gradle</p>
  
  <p><code>compile 'com.android.support:cardview-v7:22.2.1'</code></p>
  
  <p>I realised that an error is caused because I have given the wrong version number. After taking a look at the official google docs I came to know that <code>Android Support Repository</code> is used to hold <code>appcompat</code> libraries.
  <a href="https://i.stack.imgur.com/msRn3.png" rel="noreferrer"><img src="https://i.stack.imgur.com/msRn3.png" alt="enter image description here"></a></p>
  
  <p>As you can see the Support repository that I have installed is version 33. But if I change my gradle to version 33 it is still showing error.</p>
  
  <p>How can I check what version of AppCompatLibrary I have in android studio?</p>
  
  <p>EDIT:</p>
  
  <p><code>build.gradle</code> file</p>
  
  <pre><code>apply plugin: 'com.android.application'
  apply plugin: 'com.google.gms.google-services'
  android {
      compileSdkVersion 22
      buildToolsVersion "23.0.3"
  
      defaultConfig {
          applicationId "com.spintum.preexam"
          minSdkVersion 19
          targetSdkVersion 22
          versionCode 1
          versionName "1.0"
          multiDexEnabled true
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
  }
  repositories {
      mavenCentral()
  }
  dependencies {
      //    compile fileTree (dir:'libs',include:'achartengine-*.jar')
      //compile fileTree('libs/achartengine-1.1.0.jar')
      compile fileTree(include: ['*.jar'], dir: 'libs')
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:percent:22.2.0'
      compile 'com.android.support:design:22.2.1'
      compile 'com.android.support:appcompat-v7:22.2.1'
      compile 'com.android.support:support-v4:22.2.0'
      compile 'com.android.support:cardview-v7:+'
      //compile 'com.android.support:recyclerview-v7:22.2.+'
      compile 'com.google.code.gson:gson:2.3.1'
      compile 'com.google.android.gms:play-services:8.3.0'
      compile 'com.google.android.gms:play-services-auth:8.3.0'
      compile 'com.google.android.gms:play-services-identity:8.3.0'
      compile 'com.google.android.gms:play-services-plus:8.3.0'
      compile 'com.google.android.gms:play-services-location:8.3.0'
      compile 'com.android.support:multidex:1.0.0'
      compile 'com.github.markushi:circlebutton:1.1'
      compile 'com.facebook.android:facebook-android-sdk:4.0.0'
      compile 'de.hdodenhof:circleimageview:2.1.0'
      compile 'com.ToxicBakery.viewpager.transforms:view-pager-transforms:1.2.32@aar'
  }
  </code></pre>