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ProgressBar on top of FrameLayout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<FrameLayout
    android:id="@+id/gl_container"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true" >
</FrameLayout>

<SurfaceView
    android:id="@+id/surface"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_centerInParent="true" >
</SurfaceView>

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/controlContainer"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:background="#aa000000"
    android:orientation="vertical"
    android:padding="10dp" >

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal" >

        <ToggleButton
            android:id="@+id/buttonPausePlay"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/selector_play_pause"
            android:textOff=""
            android:textOn="" />

        <ImageButton
            android:id="@+id/buttonStop"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#00000000"
            android:src="@drawable/ic_media_stop" />
    </LinearLayout>

    <ProgressBar
        android:id="@+id/seekbar"
        style="@android:style/Widget.ProgressBar.Horizontal"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:enabled="false"
        android:indeterminate="false" />
</LinearLayout>

<LinearLayout
    android:id="@+id/loadingContainer"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:gravity="center"
    android:orientation="vertical" >

    <ProgressBar
        android:id="@+id/loading"
        style="@android:style/Widget.ProgressBar.Large.Inverse"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:indeterminate="true" />

</LinearLayout>

</RelativeLayout>

@Override
public void onBuffering(int progress_in_percent) {
    Log.d(TAG, "Buffering " + progress_in_percent + " %");
}

@Override
public void onBufferingBegin() {
    Log.d(TAG, "Buffering begin");
     loadingContainer.setVisibility(View.VISIBLE);
}

@Override
public void onBufferingEnd() {
    Log.d(TAG, "Buffering end");
    loadingContainer.setVisibility(View.GONE);
}