title: setContentView can't be resolved in Android
body: <p>I know it is a known issue, but my <code>ide</code>(android studio) is saying that <code>setContentView</code> can't be resolved. In fact, it was working perfect well but I tried to import some android plugin but then I deleted all the plugin files I added. Then I noticed that <code>setContentView</code> wasn't recognized anymore.</p>
  
  <p>I tried everything I found on <code>SO</code> (cleaning, rebuilding....). I read it is mainly related to the <code>xml</code> <code>view</code> files, but I have no error in these files. How can I do ? </p>
  
  <p>Update : </p>
  
  <p>when running gradle build, I get some success build. Then when I want to run the project, I get in my console</p>
  
  <pre><code>org.gradle.execution.TaskSelectionException: Task 'compileDebug' is ambiguous in root project 'NewsFeeder'. Candidates are: 'compileDebugAidl', 'compileDebugJava', 'compileDebugNdk', 'compileDebugRenderscript', 'compileDebugTestAidl', 'compileDebugTestJava', 'compileDebugTestNdk', 'compileDebugTestRenderscript
  </code></pre>
  
  <p>Edit 2 : here's my layout</p>
  
  <pre><code>&lt;android.support.v4.widget.DrawerLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/drawer_layout"
      android:layout_width="400px"
      android:layout_height="800px"&gt;
  
      &lt;FrameLayout
          android:id="@+id/content_frame"
          android:layout_width="match_parent"
          android:layout_height="match_parent" /&gt;
  
  
      &lt;ListView
          android:id="@+id/left_drawer"
          android:layout_width="280dp"
          android:layout_height="match_parent"
          android:layout_gravity="start"
          android:choiceMode="singleChoice"
          android:background="@color/white"
          android:headerDividersEnabled="false"
          /&gt;
      &lt;ListView
          android:id="@+id/right_drawer"
          android:layout_width="280dp"
          android:layout_height="match_parent"
          android:layout_gravity="end"
          android:choiceMode="singleChoice"
          android:background="@color/white"
          android:headerDividersEnabled="false"
  
          /&gt;
  &lt;/android.support.v4.widget.DrawerLayout&gt;
  </code></pre>
  
  <p>Edit 3: I restart the <code>ide</code>, and now I get in the <code>activity_main</code> file </p>
  
  <pre><code>Failed to find style 'listViewStyle' in current theme (8 similar errors not shown) "?android:attr/listPreferredItemHeight" in attribute "minHeight" is not a valid format. (Edit) (3 similar errors not shown)
  </code></pre>