title: CoordinatorLayout cannot be cast to android.support.v4.widget.DrawerLayout
body: <p>The app initialized with a splash and that shows and works well.
  Then when you try to access the menu bar the app crashes.</p>
  
  <p>This is my Main_Activity.j</p>
  
  <pre><code>import android.content.res.Configuration;
  import android.os.Bundle;
  import android.support.v4.app.ActionBarDrawerToggle;
  import android.support.v4.app.FragmentManager;
  import android.support.v4.view.GravityCompat;
  import android.support.v4.widget.DrawerLayout;
  import android.support.v7.app.AppCompatActivity;
  import android.support.v7.widget.Toolbar;
  import android.view.Menu;
  import android.view.MenuInflater;
  import android.view.MenuItem;
  import android.view.View;
  import android.widget.AdapterView;
  import android.widget.ListView;
  
  import java.util.ArrayList;
  
  public class MainActivity extends AppCompatActivity {
      /*
           DECLARACIONES
           */
      private DrawerLayout drawerLayout;
      private ListView drawerList;
      private ActionBarDrawerToggle drawerToggle;
  
      private CharSequence activityTitle;
      private CharSequence itemTitle;
      private String[] tagTitles;
  
      public class MainActivity extends AppCompatActivity {
          /*
               DECLARACIONES
               */
          private DrawerLayout drawerLayout;
          private ListView drawerList;
          private ActionBarDrawerToggle drawerToggle;
          private CharSequence activityTitle;
          private CharSequence itemTitle;
          private String[] tagTitles;
  
          @Override
          protected void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              setContentView(R.layout.activity_main);
              Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
              setSupportActionBar(toolbar);
              itemTitle = activityTitle = getTitle();
              tagTitles = getResources().getStringArray(R.array.Tags);
              drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
              drawerList = (ListView) findViewById(R.id.left_drawer);
              // Setear una sombra sobre el contenido principal cuando el drawer se despliegue
              drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
  
          //Crear elementos de la lista
          ArrayList&lt;DrawerItem&gt; items = new ArrayList&lt;DrawerItem&gt;();
          items.add(new DrawerItem(tagTitles[0], R.drawable.ic_html));
          items.add(new DrawerItem(tagTitles[1], R.drawable.ic_css));
          items.add(new DrawerItem(tagTitles[2], R.drawable.ic_javascript));
          items.add(new DrawerItem(tagTitles[3], R.drawable.ic_angular));
          items.add(new DrawerItem(tagTitles[4], R.drawable.ic_python));
          items.add(new DrawerItem(tagTitles[5], R.drawable.ic_ruby));
  
          // Relacionar el adaptador y la escucha de la lista del drawer
          drawerList.setAdapter(new DrawerListAdapter(this, items));
          drawerList.setOnItemClickListener(new DrawerItemClickListener());
  
          // Habilitar el icono de la app por si hay algún estilo que lo deshabilitó
          getSupportActionBar().setDisplayHomeAsUpEnabled(true);
          getSupportActionBar().setHomeButtonEnabled(true);
  
          // Crear ActionBarDrawerToggle para la apertura y cierre
          drawerToggle = new ActionBarDrawerToggle(
                  this,
                  drawerLayout,
                  R.drawable.ic_drawer,
                  R.string.drawer_open,
                  R.string.drawer_close
          ) {
              public void onDrawerClosed(View view) {
                  getSupportActionBar().setTitle(itemTitle);
  
                  /*Usa este método si vas a modificar la action bar
                  con cada fragmento
                   */
                  //invalidateOptionsMenu();
              }
  
              public void onDrawerOpened(View drawerView) {
                  getSupportActionBar().setTitle(activityTitle);
  
                  /*Usa este método si vas a modificar la action bar
                  con cada fragmento
                   */
                  //invalidateOptionsMenu();
              }
          };
          //Seteamos la escucha
          drawerLayout.setDrawerListener(drawerToggle);
          if (savedInstanceState == null) {
              selectItem(0);
          }
      }
  
      @Override
      public boolean onCreateOptionsMenu(Menu menu) {
          MenuInflater inflater = getMenuInflater();
          inflater.inflate(R.menu.menu_main, menu);
          return super.onCreateOptionsMenu(menu);
      }
  
      @Override
      public boolean onOptionsItemSelected(MenuItem item) {
          if (drawerToggle.onOptionsItemSelected(item)) {
              // Toma los eventos de selección del toggle aquí
              return true;
          }
          return super.onOptionsItemSelected(item);
      }
  
      /* La escucha del ListView en el Drawer */
      private class DrawerItemClickListener implements ListView.OnItemClickListener {
          @Override
          public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) {
              selectItem(position);
              drawerLayout.closeDrawer(drawerList);
          }
      }
  
      private void selectItem(int position) {
          // Reemplazar el contenido del layout principal por un fragmento
          ArticleFragment fragment = new ArticleFragment();
          Bundle args = new Bundle();
          args.putInt(ArticleFragment.ARG_ARTICLES_NUMBER, position);
          fragment.setArguments(args);
  
          FragmentManager fragmentManager = getSupportFragmentManager();
          fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();
  
          // Se actualiza el item seleccionado y el título, después de cerrar el drawer
          drawerList.setItemChecked(position, true);
          setTitle(tagTitles[position]);
          drawerLayout.closeDrawer(drawerList);
      }
  
      /* Método auxiliar para setear el titulo de la action bar */
      @Override
      public void setTitle(CharSequence title) {
          itemTitle = title;
          getSupportActionBar().setTitle(itemTitle);
      }
  
      @Override
      protected void onPostCreate(Bundle savedInstanceState) {
          super.onPostCreate(savedInstanceState);
          // Sincronizar el estado del drawer
          drawerToggle.syncState();
      }
  
      @Override
      public void onConfigurationChanged(Configuration newConfig) {
          super.onConfigurationChanged(newConfig);
          // Cambiar las configuraciones del drawer si hubo modificaciones
          drawerToggle.onConfigurationChanged(newConfig);
      }
  }
  </code></pre>
  
  <p>This is my content_main.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/drawer_layout"
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
  
      &lt;RelativeLayout
          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="240dp"
          android:layout_height="match_parent"
          android:layout_gravity="start"
          android:background="#111"
          android:choiceMode="singleChoice"
          android:divider="@android:color/transparent"
          android:dividerHeight="0dp" /&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>This is my activity_main.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.design.widget.CoordinatorLayout
      android:id="@+id/drawer_layout"
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
      android:layout_height="match_parent" android:fitsSystemWindows="true"
      tools:context=".MainActivity"&gt;
      &lt;android.support.design.widget.AppBarLayout android:layout_height="wrap_content"
          android:layout_width="match_parent" android:theme="@style/AppTheme.AppBarOverlay"&gt;
          &lt;android.support.v7.widget.Toolbar android:id="@+id/toolbar"
              android:layout_width="match_parent" android:layout_height="?attr/actionBarSize"
              android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" /&gt;
      &lt;/android.support.design.widget.AppBarLayout&gt;
      &lt;include layout="@layout/content_main" /&gt;
      &lt;android.support.design.widget.FloatingActionButton android:id="@+id/fab"
          android:layout_width="wrap_content" android:layout_height="wrap_content"
          android:layout_gravity="bottom|end" android:layout_margin="@dimen/fab_margin"
          android:src="@android:drawable/ic_dialog_email" /&gt;
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>errors</p>
  
  <pre><code>    10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime: FATAL EXCEPTION: main`enter code here
      10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime: Process: com.example.german.pedorreta, PID: 22911
      10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.german.pedorreta/com.example.german.pedorreta.MainActivity}: java.lang.ClassCastException:
  android.support.design.widget.CoordinatorLayout cannot be cast to
  android.support.v4.widget.DrawerLayout
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta
  E/AndroidRuntime:
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2198)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at
  android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2257)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at
  android.app.ActivityThread.access$800(ActivityThread.java:139)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at
  android.app.ActivityThread$H.handleMessage(ActivityThread.java:1210)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.os.Handler.dispatchMessage(Handler.java:102)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.os.Looper.loop(Looper.java:136)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.app.ActivityThread.main(ActivityThread.java:5086)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:     at java.lang.reflect.Method.invokeNative(Native Method)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:     at java.lang.reflect.Method.invoke(Method.java:515)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at dalvik.system.NativeStart.main(Native Method)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:Caused by: java.lang.ClassCastException: android.support.design.widget.CoordinatorLayout cannot be cast to android.support.v4.widget.DrawerLayout
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at com.example.german.pedorreta.MainActivity.onCreate(MainActivity.java:44)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.app.Activity.performCreate(Activity.java:5248)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1110)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2162)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2257) 
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.app.ActivityThread.access$800(ActivityThread.java:139) 
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1210) 
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.os.Handler.dispatchMessage(Handler.java:102) 
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.os.Looper.loop(Looper.java:136) 
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at android.app.ActivityThread.main(ActivityThread.java:5086) 
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at java.lang.reflect.Method.invokeNative(Native Method) 
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at java.lang.reflect.Method.invoke(Method.java:515) 
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime:at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
  10-24 03:58:12.195 22911-22911/com.example.german.pedorreta E/AndroidRuntime: at dalvik.system.NativeStart.main(Native Method)
  </code></pre>