set color of triangle on run time

Question

i am drawing a triangle with xml as follows:

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:id="@+id/rightArrow">
        <rotate
            android:fromDegrees="45"
            android:toDegrees="45"
            android:pivotX="-40%"
            android:pivotY="87%" >
            <shape
                android:shape="rectangle"  >
                <stroke android:color="@android:color/transparent" android:width="10dp"/>
                <solid
                    android:color="#000000"  />
            </shape>
        </rotate>
    </item>
</layer-list>  

now i need to set the color of this triangle on run time, so i did

        LayerDrawable layers = (LayerDrawable)  this.getActivity().getResources().getDrawable(R.drwable.customtriangle);  
       GradientDrawable shape = (GradientDrawable)(ldrawable.findDrawableByLayerId(R.id.layerItemRightArrow));

shape.setcolor(mycolor);

but i am facing rotatedrwable can not be casted to gradientdrawble at

GradientDrawable shape = (GradientDrawable)(ldrawable.findDrawableByLayerId(R.id.layerItemRightArrow));

i cant figure out how to procced...
Any help appreciated. Thanx in advance

Answer 1

Call getDrawable() on the RotateDrawable to get at the Drawable that is being rotated.