title: Class Not Found Android Support Design Widget NavigationView
body: <p>Good day, can you help me out. I got this error when compiling/running my code on an emulator. This is the sample tutorial I used to make. I used min Target API - 15 and compile the latest gradle 
  <code>'com.android.support:design:23.0.0'</code></p>
  
  <p><a href="http://www.android4devs.com/2015/06/navigation-view-material-design-support.html" rel="noreferrer">http://www.android4devs.com/2015/06/navigation-view-material-design-support.html</a></p>
  
  <p>Code Error: </p>
  
  <p><em>AndroidRuntime: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.eccp.projects.ecosavers.ecosavers/com.eccp.projects.ecosavers.ecosavers.activities.MainActivity}: android.view.InflateException: Binary XML file line #29: <strong>Binary XML file line #29: Error inflating class android.support.design.widget.NavigationView</strong>
  12-29 06:43:39.409 3448-3448/com.eccp.projects.ecosavers.ecosavers E/AndroidRuntime:     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)</em> </p>
  
  <p>E/AndroidRuntime:  <strong>Caused by: android.view.InflateException: Binary XML file line #29: Binary XML file line #29: Error inflating class android.support.design.widget.NavigationView</strong></p>
  
  <p>Here are my codes: <code>MainActivity.java</code></p>
  
  <pre><code>@Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
  
      //SET my own toolbar
      toolbar = (Toolbar) findViewById(R.id.tool_bar);
      setSupportActionBar(toolbar);
      getSupportActionBar().setDisplayShowHomeEnabled(true);
      getSupportActionBar().setHomeButtonEnabled(true);
  
      mNavigationView = (NavigationView) findViewById(R.id.navigation_view);
  
      mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
  
          @Override
          public boolean onNavigationItemSelected(MenuItem menuItem) {
              if (menuItem.isChecked()) menuItem.setChecked(false);
              else menuItem.setChecked(true);
  
              //Closing drawer on item click
              mDrawerlayout.closeDrawers();
  
              //Check to see which item was being clicked and perform appropriate action
              switch (menuItem.getItemId()) {
  
  
                  //Replacing the main content with ContentFragment Which is our Inbox View;
                  case R.id.events:
                      Toast.makeText(getApplicationContext(), "Inbox Selected", Toast.LENGTH_SHORT).show();
                      Eco_events fragment = new Eco_events();
                      android.support.v4.app.FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
                      fragmentTransaction.replace(R.id.frame, fragment);
                      fragmentTransaction.commit();
                      return true;
  
                  //  show a toast on click
  
                  case R.id.activities:
                      Toast.makeText(getApplicationContext(), "Send Selected", Toast.LENGTH_SHORT).show();
                      return true;
                  case R.id.spam:
                      Toast.makeText(getApplicationContext(), "Spam Selected", Toast.LENGTH_SHORT).show();
                      return true;
                  default:
                      Toast.makeText(getApplicationContext(), "Somethings Wrong", Toast.LENGTH_SHORT).show();
                      return true;
  
              }
          }
      });
  
      // Initializing Drawer Layout and ActionBarToggle
      mDrawerlayout = (DrawerLayout) findViewById(R.id.drawer);
      mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerlayout, toolbar, R.string.drawerOpened, R.string.drawerOpened) {
  
          @Override
          public void onDrawerClosed(View drawerView) {
              // Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
              super.onDrawerClosed(drawerView);
          }
  
          @Override
          public void onDrawerOpened(View drawerView) {
              // Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank
              super.onDrawerOpened(drawerView);
          }
      };
  
      //Setting the actionbarToggle to drawer layout
      mDrawerlayout.setDrawerListener(mDrawerToggle);
  
      //calling sync state is
      mDrawerToggle.syncState();
  
  
  }
  
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
      return super.onOptionsItemSelected(item);
  }
  </code></pre>
  
  <p>XML:<code>activity_main.xml</code></p>
  
  <pre><code>&lt;android.support.v4.widget.DrawerLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:id="@+id/drawer"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:fitsSystemWindows="true"
  tools:context=".MainActivity"&gt;
  
  &lt;LinearLayout
      android:layout_height="match_parent"
      android:layout_width="match_parent"
      android:orientation="vertical"
      &gt;
      &lt;include
          android:id="@+id/tool_bar"
          layout="@layout/toolbar"
          /&gt;
      &lt;FrameLayout
          android:id="@+id/frame"
          android:layout_width="match_parent"
          android:layout_height="match_parent"&gt;
  
      &lt;/FrameLayout&gt;
  &lt;/LinearLayout&gt;
  &lt;android.support.design.widget.NavigationView
      android:id="@+id/navigation_view"
      android:layout_height="match_parent"
      android:layout_width="wrap_content"
      android:layout_gravity="start"
      app:headerLayout="@layout/header"
      app:menu="@menu/drawer"
      /&gt; &lt;/android.support.v4.widget.DrawerLayout&gt;
  </code></pre>