android - Adding layout elements from another layout file

Question

I'm trying to get views from another layout modified these and then add them to the current layout. This is what i'm doing.

myLayout looks as follows:

<LinearLayout>
  <RelativeLayout>
    <TextView>

And my code:

LinearLayout layout = (LinearLayout) findViewById(R.id.linear);
ViewGroup info = (ViewGroup) getLayoutInflater().inflate(R.layout.myLayout, layout,false); 
RelativeLayout relative = (RelativeLayout) info.getChildAt(1);
ViewGroup vg = (ViewGroup) hiddenInfo.getChildAt(1);
TextField tv = vg.getChildAt(1);
...modify tv...
layout.addView(relative);
layout.addView(tv);

Though my program always crashes as layout.addView, what am i doing wrong?