title: Cannot resolve symbol 'Theme' in styles.xml (Android Studio)
body: <p><a href="https://i.stack.imgur.com/dMjYm.png"><img src="https://i.stack.imgur.com/dMjYm.png" alt="Screenshot"></a></p>
  
  <p>Since today, Android Studio can't find the AppCompat themes in styles.xml, but for example AppCompatActivity in code does get recognized. My Android Studio version is 2.2.2, Build #AI-145.3360264</p>
  
  <p>I already tried upgrading to the latest build tools, compile sdk (25) version etc. but it didn't fix the problem.</p>
  
  <p>At the moment I have installed the following (from sdk manager):</p>
  
  <ul>
  <li>android api: 19 and 23</li>
  <li>sdk platform tools: 25.0.1</li>
  <li>sdk tools: 25.2.3</li>
  <li>build-tools: 23.0.2 and 25.0.1</li>
  <li>support repository: 40</li>
  <li>google repository: 39</li>
  </ul>
  
  <p>and a few others, that shouldn't be necessary to list here.</p>
  
  <p>build.gradle of app:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 23
      buildToolsVersion '25.0.1'
      defaultConfig {
          applicationId "xxx.xxxxxxxx.xxxxxxxxx" //not the real applicationId
          minSdkVersion 14
          targetSdkVersion 19
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
          release {
              minifyEnabled true
              shrinkResources true
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
          debug {
  
          }
      }
  }
  
  dependencies {
      compile fileTree(include: ['*.jar'], dir: 'libs')
      compile files('libs/RootTools.jar')
      compile 'com.android.support:support-v4:23.+'
      compile 'com.android.support:support-v13:23.+'
      compile 'com.android.support:appcompat-v7:23.+'
      compile 'com.android.support:design:23.+'
      compile 'com.android.support:cardview-v7:23.+'
      compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'
      compile 'de.hdodenhof:circleimageview:2.1.0'
  }
  </code></pre>