java.lang.RuntimeException: Binary XML file line #23: You must supply a layout_depth attribute.
	at android.content.res.TypedArray.getLayoutDimension(TypedArray.java:492)
	at com.amazon.euclid.app.ZRoot$LayoutParams.<init>(ZRoot.java:683)
	at com.amazon.euclid.view.ZViewHost$LayoutParams.<init>(ZViewHost.java:532)
	at com.amazon.euclid.widget.ZContainer.generateLayoutParams(ZContainer.java:427)
	at com.amazon.euclid.widget.ZContainer.generateLayoutParams(ZContainer.java:67)
	at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)
	at android.view.LayoutInflater.rInflate(LayoutInflater.java:762)
	at android.view.LayoutInflater.rInflate(LayoutInflater.java:762)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:496)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:398)
	at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
	at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:301)
	at android.app.Activity.setContentView(Activity.java:1949)
	at com.example.amazon.dpc.ZButtonDepthActivity.onCreate(ZButtonDepthActivity.java:35)
	at android.app.Activity.performCreate(Activity.java:5277)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2213)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2325)
	at android.app.ActivityThread.access$800(ActivityThread.java:145)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1216)
	at android.os.Handler.dispatchMessage(Handler.java:102)
	at android.os.Looper.loop(Looper.java:145)
	at android.app.ActivityThread.main(ActivityThread.java:5266)
	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:826)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:642)
	at dalvik.system.NativeStart.main(Native Method)