如何使Exoplayer控件始终可见？

<com.google.android.exoplayer2.ui.PlayerView
    android:id="@+id/exo_player_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

PlayerView playerView = new PlayerView(context);
// 设置PlayerView的宽高
playerView.setLayoutParams(new ViewGroup.LayoutParams(
    ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
// 添加PlayerView到布局中
container.addView(playerView);

<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- 其他视图 -->

    <com.google.android.exoplayer2.ui.PlayerView
        android:id="@+id/exo_player_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</FrameLayout>

@Override
protected void onResume() {
    super.onResume();
    exoPlayerView.setVisibility(View.VISIBLE);
}

@Override
protected void onPause() {
    super.onPause();
    exoPlayerView.setVisibility(View.INVISIBLE);
}