title: android.graphics.drawable.ColorDrawable cannot be cast to android.support.v7.widget.RoundRectDrawableWithShadow
body: <p>I tried to use CardView in my Application which worked pretty good within my xml Layout. Since I want to generate them in my code and not via xml I tried to set the radius with CardView.setRadius()-Method as suggested by Android Developers (<a href="https://developer.android.com/preview/material/ui-widgets.html#cardview">https://developer.android.com/preview/material/ui-widgets.html#cardview</a>).</p>
  
  <p>This does not work at all! I hope someone can help me, with my problem or got a nice workaround with xml layouts.</p>
  
  <p>This is my code:</p>
  
  <pre><code>int height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 100, getResources().getDisplayMetrics());
          float radius = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 4, getResources().getDisplayMetrics());
  
          for (String color : colors) {
              CardView card = new CardView(getActivity());
              TextView text = new TextView(getActivity());
              card.setBackgroundColor(Color.parseColor("#"+color));
              card.setLayoutParams(new ViewGroup.LayoutParams(
                      ViewGroup.LayoutParams.MATCH_PARENT, height));
              card.setRadius(radius); //Error!!
              text.setText(args.get(colors.indexOf(color)) + " - #" + color);
              card.addView(text);
              group.addView(card);
          }
  </code></pre>
  
  <p>This is my Log:</p>
  
  <pre><code>java.lang.RuntimeException: Unable to start activity ComponentInfo{com.brobox.materialcolorpalette/com.brobox.materialcolorpalette.MainActivity}: java.lang.ClassCastException: android.graphics.drawable.ColorDrawable cannot be cast to android.support.v7.widget.RoundRectDrawableWithShadow
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2212)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2271)
              at android.app.ActivityThread.access$800(ActivityThread.java:144)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:136)
              at android.app.ActivityThread.main(ActivityThread.java:5146)
              at java.lang.reflect.Method.invokeNative(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:515)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
              at dalvik.system.NativeStart.main(Native Method)
       Caused by: java.lang.ClassCastException: android.graphics.drawable.ColorDrawable cannot be cast to android.support.v7.widget.RoundRectDrawableWithShadow
              at android.support.v7.widget.CardViewEclairMr1.setRadius(CardViewEclairMr1.java:76)
              at android.support.v7.widget.CardView.setRadius(CardView.java:89)
              at com.brobox.materialcolorpalette.ColorFragment.onCreateView(ColorFragment.java:61)
              at android.support.v4.app.Fragment.performCreateView(Fragment.java:1504)
              at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:942)
              at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1121)
              at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
              at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1484)
              at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:571)
              at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1171)
              at android.app.Activity.performStart(Activity.java:5241)
              at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2178)
              at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2271)
              at android.app.ActivityThread.access$800(ActivityThread.java:144)
              at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
              at android.os.Handler.dispatchMessage(Handler.java:102)
              at android.os.Looper.loop(Looper.java:136)
              at android.app.ActivityThread.main(ActivityThread.java:5146)
              at java.lang.reflect.Method.invokeNative(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:515)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
              at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p><strong>UPDATE:</strong>
  I use the new Lollipop SDK now with Appcompat version 21. Now It does not work at all even, when I try it without setRadius().</p>
  
  <p>New Log:</p>
  
  <pre><code>java.lang.ClassCastException: android.graphics.drawable.ColorDrawable cannot be cast to android.support.v7.widget.RoundRectDrawableWithShadow
              at android.support.v7.widget.CardViewEclairMr1.getShadowBackground(CardViewEclairMr1.java:148)
              at android.support.v7.widget.CardViewEclairMr1.getMinWidth(CardViewEclairMr1.java:139)
              at android.support.v7.widget.CardView.onMeasure(CardView.java:181)
              at android.view.View.measure(View.java:16521)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
              at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
              at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
              at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
              at android.view.View.measure(View.java:16521)
              at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1226)
              at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
              at android.widget.ScrollView.onMeasure(ScrollView.java:326)
              at android.view.View.measure(View.java:16521)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
              at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
              at android.view.View.measure(View.java:16521)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
              at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
              at android.view.View.measure(View.java:16521)
              at android.support.v4.widget.DrawerLayout.onMeasure(DrawerLayout.java:848)
              at android.view.View.measure(View.java:16521)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
              at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
              at android.view.View.measure(View.java:16521)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
              at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:453)
              at android.view.View.measure(View.java:16521)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
              at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
              at android.view.View.measure(View.java:16521)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
              at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1404)
              at android.widget.LinearLayout.measureVertical(LinearLayout.java:695)
              at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
              at android.view.View.measure(View.java:16521)
              at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
              at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
              at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2552)
              at android.view.View.measure(View.java:16521)
              at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1915)
              at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1109)
              at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1291)
              at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996)
              at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5603)
              at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
              at android.view.Choreographer.doCallbacks(Choreographer.java:574)
              at android.view.Choreographer.doFrame(Choreographer.java:544)
              at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
              at android.os.Handler.handleCallback(Handler.java:733)
              at android.os.Handler.dispatchMessage(Handler.java:95)
              at android.os.Looper.loop(Looper.java:136)
              at android.app.ActivityThread.main(ActivityThread.java:5146)
              at java.lang.reflect.Method.invokeNative(Native Method)
              at java.lang.reflect.Method.invoke(Method.java:515)
              at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
              at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
              at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p><strong>Update 2:</strong>
  I guess this is a bug by google. So I pointed it out for them: <a href="https://code.google.com/p/android/issues/detail?id=77843">https://code.google.com/p/android/issues/detail?id=77843</a></p>