Android 全屏显示片段内定义的videoview

我有一个活动，它有两个框架布局，被两个片段替换。一个装有视频播放器（使用videoView），另一个装有视频列表。如下

video\u player\u activity.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/normal_margin"
android:paddingTop="@dimen/normal_margin"

tools:context="com.example.project.android.VideoPlayerActivity">

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="200dp"
    android:id="@+id/rl_video_player_relativi_layout"
    android:orientation="vertical">

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="top"
        android:id="@+id/fl_player_activity_video_surfrace_container"
        >
    </FrameLayout>


</RelativeLayout>

<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/rl_video_player_relativi_layout"
    android:layout_marginTop="10dp"
    android:id="@+id/fl_player_activity_video_list_container"
    ></FrameLayout>

我能够使用fragmentTransaction将这两个片段带到活动中。问题是当我尝试使用控件的全屏按钮全屏显示视频表面时，或者当它没有全屏显示时下面是我在VideoPlayerFragment.java中使用的代码使视图全屏显示

   displayMetrics = new DisplayMetrics();
  getActivity().getWindowManager().getDefaultDisplay().
  getMetrics(displayMetrics);
   fullScreenWidth=displayMetrics.widthPixels;
   fullScreenHeight=displayMetrics.heightPixels;

  @Override
     public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
        Log.d("config changed  to ","landscapte");
        videoSurface.setDimensions(fullScreenHeight,fullScreenWidth);
        isOrientationPortrat=false;
        isFullScreen = true;


    } else {
        Log.d("config changed to ","portrait");
        isOrientationPortrat=true;

    }
}

有人能帮忙吗。。。！提前谢谢

   displayMetrics = new DisplayMetrics();
  getActivity().getWindowManager().getDefaultDisplay().
  getMetrics(displayMetrics);
   fullScreenWidth=displayMetrics.widthPixels;
   fullScreenHeight=displayMetrics.heightPixels;

  @Override
     public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
        Log.d("config changed  to ","landscapte");
        videoSurface.setDimensions(fullScreenHeight,fullScreenWidth);
        isOrientationPortrat=false;
        isFullScreen = true;


    } else {
        Log.d("config changed to ","portrait");
        isOrientationPortrat=true;

    }
}