android - GLSurfaceView hides UI widget -

i'm placing glsurfaceview on top of output camera , drawing onto it. have regular layout containing surfaceview , textview:

<relativelayout  xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/relativelayout1" android:layout_width="fill_parent" android:layout_height="fill_parent" > <surfaceview     android:id="@+id/camerapreview"     android:layout_width="fill_parent"     android:layout_height="fill_parent" />  <textview     android:id="@+id/nearest_place_label"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparentbottom="true"     android:layout_centerhorizontal="true"     android:textcolor="#000"     android:textsize="30sp"     android:text="@string/empty"  />  </relativelayout> 

then programmatically add glsurfaceview:

public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_bigarrow);             //...     camerapreview = (surfaceview) findviewbyid(r.id.camerapreview);     mglview = new myglsurfaceview(this);     addcontentview(mglview, new layoutparams(layoutparams.match_parent,             layoutparams.match_parent));     previewholder = camerapreview.getholder();     previewholder.addcallback(surfacecallback);     previewholder.settype(surfaceholder.surface_type_push_buffers);      nearestpublabel = (textview) findviewbyid(r.id.nearest_place_label);     nearestpublabel.settext(r.string.bigarrow_searching);     nearestpublabel.setvisibility(view.visible);//clutching @ straws  } 

the glsurfaceview transparent, apart small area of screen, , can see camera preview beneath it. textview isn't visible. when had set regular views, textview visible.

i switched loading glsurfaceview xml rather using addcontentview, , textview visible. doesn't explain wrong previous approach, i'm happy now.