Change shape solid color at runtime inside Drawable xml used as background

Question

I've a Drawable xml file (background.xml):

<?xml version="1.0" encoding="UTF-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android" >     <item>         <shape>          ...........         </shape>     </item>      <item android:id="@+id/shape_id">         <shape android:shape="rectangle">             <solid android:color="#ffefefef" />          </shape>     </item>  </layer-list> 

used by a LinearLayout:

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:background="@drawable/background"     android:id="@+id/layout_id"     > 

Now i need to change the shape shape_id solid color at runtime based on some conditions. How to do this?

Answer 1

Found by me:

    View v = findViewById(R.id.layout_id);      LayerDrawable bgDrawable = (LayerDrawable)v.getBackground();     final GradientDrawable shape = (GradientDrawable)   bgDrawable.findDrawableByLayerId(R.id.shape_id);     shape.setColor(----);