title: IntelliJ and android.support.v7.widget.GridLayout
body: <p>I am running into trouble either setting up the support v7 GridLayout library in my IntelliJ project, or properly referencing it in my code.</p>
  
  <p>I currently use the ActionBarSherlock and Facebook libraries in my project, and have set up the support GridLayout library the same way (not having source in the src folder, I told IntelliJ to use the project dir as a jar folder). Everything looked fine, built and deployed to my test device, but when I tried to inflate the layout, my app crashed.</p>
  
  <pre><code>09-17 17:07:43.916: ERROR/AndroidRuntime(4143): FATAL EXCEPTION: main
      java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example/com.example.MainHostActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class android.support.v7.widget.GridLayout
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2753)
      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2769)
      at android.app.ActivityThread.access$2500(ActivityThread.java:129)
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2117)
      at android.os.Handler.dispatchMessage(Handler.java:99)
      at android.os.Looper.loop(Looper.java:143)
      at android.app.ActivityThread.main(ActivityThread.java:4717)
      at java.lang.reflect.Method.invokeNative(Native Method)
      at java.lang.reflect.Method.invoke(Method.java:521)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
      at dalvik.system.NativeStart.main(Native Method)
      Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class android.support.v7.widget.GridLayout
      at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576)
      at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
      at com.decoderhq.indieshuffle.PlayerFragment.onCreateView(PlayerFragment.java:63)
      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:846)
      at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1061)
      at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1160)
      at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:272)
      at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:558)
      at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
      at com.actionbarsherlock.internal.ActionBarSherlockCompat.setContentView(ActionBarSherlockCompat.java:857)
      at com.actionbarsherlock.app.SherlockFragmentActivity.setContentView(SherlockFragmentActivity.java:251)
      at com.example.MainHostActivity.onCreate(MainHostActivity.java:58)
      at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2717)
      ... 11 more
      Caused by: java.lang.ClassNotFoundException: android.support.v7.widget.GridLayout in loader dalvik.system.PathClassLoader[/data/app/com.example.MyApp.apk]
      at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
      at android.view.LayoutInflater.createView(LayoutInflater.java:466)
      at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565)
      ... 30 more
  </code></pre>
  
  <p>IntelliJ is also telling me that my GridLayout is "not allowed here" in the XML designer, which I unable to find any help on in various search engines. My layout (truncated for length) is as follows:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:grid="http://schemas.android.com/apk/res-auto"
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
  
      &lt;android.support.v7.widget.GridLayout
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"
          grid:columnCount="3"
          grid:rowCount="2"
          android:id="@+id/player_grid"&gt;
  
      &lt;!-- previous artist label button/view --&gt;
      &lt;LinearLayout
              android:id="@+id/prev_artist_label_layout"
              android:background="@drawable/player_prev_artist_bg_full"
              android:padding="10dp"
              grid:layout_column="0"
              grid:layout_row="0"&gt;
  
          &lt;TextView
                  android:id="@+id/prev_artist_label"
                  android:layout_height="wrap_content"
                  android:layout_width="0dp"
                  android:layout_weight="1"
                  android:layout_gravity="center"
                  android:singleLine="true"
                  style="@style/PlayerArtistText"
                  android:ellipsize="end"/&gt;
          &lt;ImageView
                  android:id="@+id/prev_artist_label_arrow"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:padding="5dp"/&gt;
  
      &lt;/LinearLayout&gt;
  
      &lt;!-- more cells in the grid [truncated for length] --&gt;
  
      &lt;/android.support.v7.widget.GridLayout&gt;
  
      &lt;LinearLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_alignBottom="@id/player_grid"&gt;
  
      &lt;TextView
              android:id="@+id/curr_time_label"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_gravity="center_vertical"
              style="@style/PlayerTimeLabels"
              android:text="00:00"
              android:layout_marginLeft="20dp"
              android:layout_marginRight="10dp"/&gt;
      &lt;SeekBar
              android:layout_height="wrap_content"
              android:layout_width="0dp"
              android:layout_weight="1"
              android:id="@+id/seek_bar"/&gt;
      &lt;TextView
              android:id="@+id/duration_time_label"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_gravity="center_vertical"
              style="@style/PlayerTimeLabels"
              android:text="00:00"
              android:layout_marginLeft="10dp"
              android:layout_marginRight="20dp"/&gt;
  
  &lt;/LinearLayout&gt;
  
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>Coles Notes: I have a support GridLayout in a RelativeLayout and a LinearLayout that sits on top, anchored at the bottom of the RelativeLayout. </p>
  
  <p>The log indicates I am missing a class. I am hoping I just didn't set the library up properly, as I can't think of what else it could be. Hopefully someone with some IntelliJ/Android knowledge can point me in the right direction.</p>
  
  <p>Please go easy on me if this question is missing some info - this is my first try at using stackoverflow to ask for help.</p>
  
  <p>Thanks in advance </p>