Force Front

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:opencv="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <org.opencv.android.JavaCameraView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@+id/fd_activity_surface_view" 
        opencv:camera_id="front"/>
   <ImageButton
      android:id="@+id/button_capture"
	    android:background="@drawable/camera"
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:layout_gravity="center"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="15dip"
        android:layout_alignParentRight="true"
	    android:onClick="capturePhoto">
	</ImageButton>

</RelativeLayout>