I can haz layout params?

LayoutParams.java

		LinearLayout roundedCell = new LinearLayout(this);
		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
		int drawableId = -1;
		if(rounded.equals("top")) {
			drawableId = R.drawable.list_view_heading_list;
			layoutParams.setMargins(0, 0, 0, 1);
		} else if(rounded.equals("bot")) {
			drawableId = R.drawable.list_view_footer_list;
			layoutParams.setMargins(1, 0, 0, 0);
		}
		Drawable d = getResources().getDrawable(drawableId);
		roundedCell.setLayoutParams(layoutParams);
		roundedCell.setBackgroundDrawable(d);
		
		return roundedCell;

logcat.log

E/AndroidRuntime( 2378): java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams
E/AndroidRuntime( 2378): 	at android.widget.ListView.measureScrapChild(ListView.java:1135)
E/AndroidRuntime( 2378): 	at android.widget.ListView.measureHeightOfChildren(ListView.java:1218)
E/AndroidRuntime( 2378): 	at android.widget.ListView.onMeasure(ListView.java:1127)
E/AndroidRuntime( 2378): 	at android.view.View.measure(View.java:8313)
E/AndroidRuntime( 2378): 	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
E/AndroidRuntime( 2378): 	at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017)
E/AndroidRuntime( 2378): 	at android.widget.LinearLayout.measureVertical(LinearLayout.java:386)
E/AndroidRuntime( 2378): 	at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
E/AndroidRuntime( 2378): 	at android.view.View.measure(View.java:8313)
E/AndroidRuntime( 2378): 	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
E/AndroidRuntime( 2378): 	at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
E/AndroidRuntime( 2378): 	at android.view.View.measure(View.java:8313)
E/AndroidRuntime( 2378): 	at android.widget.LinearLayout.measureVertical(LinearLayout.java:531)
E/AndroidRuntime( 2378): 	at android.widget.LinearLayout.onMeasure(LinearLayout.java:309)
E/AndroidRuntime( 2378): 	at android.view.View.measure(View.java:8313)
E/AndroidRuntime( 2378): 	at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138)
E/AndroidRuntime( 2378): 	at android.widget.FrameLayout.onMeasure(FrameLayout.java:250)
E/AndroidRuntime( 2378): 	at android.view.View.measure(View.java:8313)
E/AndroidRuntime( 2378): 	at android.view.ViewRoot.performTraversals(ViewRoot.java:839)
E/AndroidRuntime( 2378): 	at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
E/AndroidRuntime( 2378): 	at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 2378): 	at android.os.Looper.loop(Looper.java:130)
E/AndroidRuntime( 2378): 	at android.app.ActivityThread.main(ActivityThread.java:3683)
E/AndroidRuntime( 2378): 	at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 2378): 	at java.lang.reflect.Method.invoke(Method.java:507)
E/AndroidRuntime( 2378): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
E/AndroidRuntime( 2378): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
E/AndroidRuntime( 2378): 	at dalvik.system.NativeStart.main(Native Method)