title: Android Studio "cannot resolve symbol String"
body: <p>I have a small project that was started in Eclipse. I then exported it to a gradle file, and imported it to AS (0.5.7).</p>
  
  <p>At first, not much seemed to work as it should, but after a "build => make project", I didn't seem to get any highlighted errors or so.</p>
  
  <p>So I tried to run the app to an emulated device. Well, the device never launched, and now I get red squiggly lines under mentions of "String", "ArrayList" etc, saying it "cannot resolve the symbol".</p>
  
  <p>What the f?</p>
  
  <p>I have tried cleaning and rebuilding, as well as "sync project with gradle files".</p>
  
  <p>Where do I go from here? I want to get going with developing in AS so bad!</p>
  
  <p>edit: Screenshot of project setup: <a href="http://i.imgur.com/ycNyPaT.png" rel="noreferrer">http://i.imgur.com/ycNyPaT.png</a></p>
  
  <p>Contents of build.gradle:</p>
  
  <pre><code>buildscript {
      repositories {
          mavenCentral()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:0.9.+'
      }
  }
  apply plugin: 'android'
  
  dependencies {
      compile fileTree(dir: 'libs', include: '*.jar')
  }
  
  android {
      compileSdkVersion 19
      buildToolsVersion "19.0.1"
  
      sourceSets {
          main {
              manifest.srcFile 'AndroidManifest.xml'
              java.srcDirs = ['src']
              resources.srcDirs = ['src']
              aidl.srcDirs = ['src']
              renderscript.srcDirs = ['src']
              res.srcDirs = ['res']
              assets.srcDirs = ['assets']
          }
  
          // Move the tests to tests/java, tests/res, etc...
          instrumentTest.setRoot('tests')
  
          // Move the build types to build-types/&lt;type&gt;
          // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
          // This moves them out of them default location under src/&lt;type&gt;/... which would
          // conflict with src/ being used by the main source set.
          // Adding new build types or product flavors should be accompanied
          // by a similar customization.
          debug.setRoot('build-types/debug')
          release.setRoot('build-types/release')
      }
  }
  </code></pre>