title: Gridview v7 support for older api android.support.v7.widget.Gridlayout failed to instaniate
body: <p>I've been trying to use the v7 support library to use a grid layout in my android project. I've seen that many people have had the same issues that I'm having but all of their fixes don't work for me. I've updated java. I've updated the latest support library. I've added the support package to the build path. I've tried dragging a gridview onto a view and allow eclipse import the package. Non of these work. I continue to get <code>android.support.v7.widget.GridLayout</code> failed to instantiate. I even created a test project and started with the support grid layout and the same error. Anyone have any other ideas? These are some places I've looked for help:</p>
  
  <p><a href="https://stackoverflow.com/questions/10773981/eclipse-giving-an-error-of-android-support-v7-widget-gridlayout-failed-to-instan">Eclipse giving an error of android.support.v7.widget.GridLayout failed to instantiate</a></p>
  
  <p><a href="https://stackoverflow.com/questions/12468606/intellij-and-android-support-v7-widget-gridlayout">IntelliJ and android.support.v7.widget.GridLayout</a></p>
  
  <p><a href="https://stackoverflow.com/questions/15816283/eclipse-and-android-sl-gridlayout-not-working-together-android-support-v7-wid">Eclipse and Android SL GridLayout not working together - &quot;android.support.v7.widget.GridLayout could not be instantiated&quot;</a></p>
  
  <p>among many others....</p>
  
  <p>Here's my activity_main.xml:</p>
  
  <pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.v7.widget.GridLayout 
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent"
      app:alignmentMode="alignBounds"
      app:columnCount="6"
      app:columnOrderPreserved="false"
      app:useDefaultMargins="true" &gt;
  
      &lt;EditText
          android:id="@+id/total"
          app:layout_column="0"
          app:layout_columnSpan="6"
          app:layout_gravity="left"
          app:layout_row="0"
          android:clickable="false"
          android:ems="10"
          android:inputType="none|number"
          android:textAlignment="textEnd"
          android:width="500dp" &gt;
  
          &lt;requestFocus /&gt;
      &lt;/EditText&gt;
  
      &lt;Button
          android:id="@+id/Button8"
          app:layout_column="1"
          app:layout_row="1"
          android:background="@drawable/button_light_grey"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="numberButtonEventHandler"
          android:text="8" /&gt;
  
      &lt;Button
          android:id="@+id/Button9"
          app:layout_column="2"
          app:layout_row="1"
          android:background="@drawable/button_light_grey"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="numberButtonEventHandler"
          android:text="9" /&gt;
  
      &lt;Button
          android:id="@+id/Button4"
          app:layout_column="0"
          app:layout_row="2"
          android:background="@drawable/button_light_grey"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="numberButtonEventHandler"
          android:text="4" /&gt;
  
      &lt;Button
          android:id="@+id/Button5"
          app:layout_column="1"
          app:layout_row="2"
          android:background="@drawable/button_light_grey"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="numberButtonEventHandler"
          android:text="5" /&gt;
  
      &lt;Button
          android:id="@+id/Button6"
          app:layout_column="2"
          app:layout_row="2"
          android:background="@drawable/button_light_grey"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="numberButtonEventHandler"
          android:text="6" /&gt;
  
      &lt;Button
          android:id="@+id/ButtonMultiply"
          app:layout_column="3"
          app:layout_row="2"
          android:background="@drawable/custom_button"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="Multiply"
          android:text="*"
          android:textColor="@color/light_grey" /&gt;
  
      &lt;Button
          android:id="@+id/Button1"
          app:layout_column="0"
          app:layout_row="3"
          android:background="@drawable/button_light_grey"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="numberButtonEventHandler"
          android:text="1" /&gt;
  
      &lt;Button
          android:id="@+id/Button2"
          app:layout_column="1"
          app:layout_row="3"
          android:background="@drawable/button_light_grey"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="numberButtonEventHandler"
          android:text="2" /&gt;
  
      &lt;Button
          android:id="@+id/Button3"
          app:layout_column="2"
          app:layout_row="3"
          android:background="@drawable/button_light_grey"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="numberButtonEventHandler"
          android:text="3" /&gt;
  
      &lt;Button
          android:id="@+id/ButtonMinus"
          app:layout_column="3"
          app:layout_row="3"
  
          android:background="@drawable/custom_button"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="Subtract"
          android:text="-"
          android:textColor="@color/light_grey" /&gt;
  
      &lt;Button
          android:id="@+id/ButtonDivide"
          app:layout_column="3"
          app:layout_gravity="right"
          app:layout_row="1"
          app:layout_rowSpan="2"
          android:background="@drawable/custom_button"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="Divide"
          android:text="/"
          android:textColor="@color/light_grey" /&gt;
  
      &lt;Button
          android:id="@+id/button0"
          app:layout_column="0"
          app:layout_columnSpan="2"
          app:layout_row="4"
          android:background="@drawable/button_light_grey"
          android:minHeight="20dp"
          android:minWidth="82dp"
          android:onClick="numberButtonEventHandler"
          android:text="0" /&gt;
  
      &lt;Button
          android:id="@+id/buttonPoint"
          app:layout_column="2"
          app:layout_row="4"
          android:background="@drawable/button_light_grey"
          android:minHeight="20dip"
          android:minWidth="40dp"
          android:onClick="numberButtonEventHandler"
          android:text="."
          android:width="20dip" /&gt;
  
      &lt;Button
          android:id="@+id/ButtonPlus"
          app:layout_column="3"
          app:layout_row="4"
          android:background="@drawable/custom_button"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="Add"
          android:text="+"
          android:textColor="@color/light_grey" /&gt;
  
      &lt;Button
          android:id="@+id/ButtonEqueals"
          app:layout_column="4"
          app:layout_row="3"
          app:layout_rowSpan="2"
          android:background="@drawable/custom_button"
          android:height="40dp"
          android:minHeight="82dp"
          android:minWidth="20dp"
          android:onClick="Equeals"
          android:text="="
          android:textColor="@color/light_grey"
          android:width="40dp" /&gt;
  
      &lt;Button
          android:id="@+id/Button7"
          app:layout_column="0"
          app:layout_row="1"
          android:background="@drawable/button_light_grey"
          android:minHeight="40dip"
          android:minWidth="40dip"
          android:onClick="numberButtonEventHandler"
          android:text="7" /&gt;
  
  
  
  &lt;/android.support.v7.widget.GridLayout&gt;
  </code></pre>
  
  <p>this is a snip of the project tree showing referenced libraries, dependencies, and libs all pointing to v7 gridlayout: New Edit, asked to remove one reference. </p>
  
  <p><img src="https://i.stack.imgur.com/taDjK.png" alt="enter image description here"></p>
  
  <p>This is the exact exception I get:</p>
  
  <pre><code>java.lang.ClassNotFoundException: android.support.v7.gridlayout.R$dimen
      at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
      at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
      at java.security.AccessController.doPrivileged(Native Method)
      at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
      at android.support.v7.widget.GridLayout.&lt;init&gt;(GridLayout.java:255)
      at android.support.v7.widget.GridLayout.&lt;init&gt;(GridLayout.java:274)
      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
      at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
      at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
      at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.instantiateClass(ProjectCallback.java:422)
      at com.android.ide.eclipse.adt.internal.editors.layout.ProjectCallback.loadView(ProjectCallback.java:179)
      at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:207)
      at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:135)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:466)
      at android.view.LayoutInflater.inflate(LayoutInflater.java:372)
      at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:385)
      at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:332)
      at com.android.ide.common.rendering.LayoutLibrary.createSession(LayoutLibrary.java:325)
      at com.android.ide.eclipse.adt.internal.editors.layout.gle2.RenderService.createRenderSession(RenderService.java:440)
      at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.renderWithBridge(GraphicalEditorPart.java:1545)
      at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.recomputeLayout(GraphicalEditorPart.java:1302)
      at com.android.ide.eclipse.adt.internal.editors.layout.gle2.GraphicalEditorPart.activated(GraphicalEditorPart.java:1059)
      at com.android.ide.eclipse.adt.internal.editors.layout.LayoutEditorDelegate.delegatePageChange(LayoutEditorDelegate.java:686)
      at com.android.ide.eclipse.adt.internal.editors.common.CommonXmlEditor.pageChange(CommonXmlEditor.java:360)
      at org.eclipse.ui.part.MultiPageEditorPart$2.widgetSelected(MultiPageEditorPart.java:292)
      at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:248)
      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
      at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:774)
      at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3028)
      at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1749)
      at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:278)
      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
      at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4169)
      at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3758)
      at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1053)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942)
      at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
      at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
      at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
      at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
      at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
      at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
      at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
      at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
      at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
      at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)
      at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
      at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
      at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
  </code></pre>