我看了下界面是全屏的，也就是说没有标题栏，也没有系统的状态栏；应为layout的问题，与全屏无关；
楼主看下布局（注意备份哦），先直接去掉图标，再想办法加个ID，代码中加 一个控制，例:
music_imageView= 
 music_imageView.setVisibility(View.VISIBLE);
music_imageView.setVisibility(View.GONE);

谢谢您回答我的问题，我想说一下，我把顶上的android Imageview控件直接删掉，可以全屏，正如你说的layout控件影响他了。我现在不想每次手动的去隐藏，这样如果很多控件，体验不好。所以我现在想的是如何忽略这个图片控件占的位置，就能直接全屏。比如在listview中怎么实现播放视频能全屏

把你的布局粘出来看看，肯定是布局的问题

推荐：https://github.com/wlsh/JieCaoVideoPlayer/

布局如图：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    android:id="@+id/group_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <ImageView
        android:id="@+id/image_test"
        android:src="@mipmap/ic_launcher"
        android:layout_width="match_parent"
        android:layout_height="100dp"/>
    
    <RelativeLayout
        android:layout_below="@id/image_test"
        android:id="@+id/videolayout"
        android:layout_width="match_parent"
        android:layout_height="240dp">

        <com.systems.alva.videoplayerdemo1.CustomSurfaceView
            android:id="@+id/videoplayer"
            android:layout_width="match_parent"
            android:layout_height="240dp"/>
        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_alignParentBottom="true"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true">
            <SeekBar
                android:id="@+id/play_seek"
                android:layout_marginRight="-20dp"
                android:layout_marginLeft="-20dp"
                android:max="100"
                android:progress="20"
                android:indeterminate="false"
                android:layout_width="match_parent"
                android:layout_height="5dp"/>

            <RelativeLayout
                android:gravity="center_vertical"
                android:background="#aa000000"
                android:layout_width="match_parent"
                android:layout_height="match_parent">
                <LinearLayout
                    android:id="@+id/left_layout"
                    android:orientation="horizontal"
                    android:gravity="center_vertical"
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent">
                    <ImageView
                        android:id="@+id/pase_image"
                        android:layout_marginLeft="16dp"
                        android:src="@mipmap/video_start"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"/>
                        <TextView
                            android:layout_marginLeft="32dp"
                            android:textSize="14sp"
                            android:textColor="#ffffff"
                            android:id="@+id/current_text_tv"
                            android:text="00:00:00"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"/>

                    <TextView
                        android:layout_marginLeft="5dp"
                        android:textSize="14sp"
                        android:textColor="#4c4c4c"
                        android:text="/"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"/>

                    <TextView
                        android:id="@+id/time_total_tv"
                        android:layout_marginLeft="5dp"
                        android:textSize="14sp"
                        android:textColor="#4c4c4c"
                        android:text="00:00:00"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"/>
                </LinearLayout>

                <LinearLayout
                    android:id="@+id/controller_layout"
                    android:gravity="center_vertical|right"
                    android:orientation="horizontal"
                    android:layout_toRightOf="@id/left_layout"
                    android:layout_width="10dp"
                    android:layout_alignParentRight="true"
                    android:layout_height="match_parent">

                    <ImageView
                        android:visibility="gone"
                        android:id="@+id/music_imageView"
                        android:layout_width="wrap_content"
                        android:layout_height="match_parent"
                        android:src="@mipmap/video_music"/>

                    <SeekBar
                        android:visibility="gone"
                        android:id="@+id/volume_seek"
                        android:max="100"
                        android:progress="20"
                        android:indeterminate="false"
                        android:layout_width="100dp"
                        android:layout_height="5dp"/>
                    <View
                        android:background="#1E1E1E"
                        android:layout_marginLeft="1dp"
                        android:layout_marginTop="5dp"
                        android:layout_marginBottom="5dp"
                        android:layout_width="1dp"
                        android:layout_height="match_parent"/>
                    <ImageView
                        android:id="@+id/screen"
                        android:layout_marginLeft="16dp"
                        android:layout_marginRight="16dp"
                        android:src="@mipmap/video_fullscreen"
                        android:layout_width="wrap_content"
                        android:layout_height="match_parent"/>
                </LinearLayout>
            </RelativeLayout>
        </LinearLayout>
       <RelativeLayout
           android:visibility="visible"
           android:id="@+id/thumbnail_layout"
           android:background="#000000"
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:layout_alignParentTop="true"
           android:layout_alignParentLeft="true"
           android:layout_alignParentStart="true">
        <ImageView
            android:id="@+id/thumbnail_image"
            android:layout_centerInParent="true"
            android:src="@mipmap/video_start"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>

       </RelativeLayout>
    </RelativeLayout>
    <RelativeLayout
        android:layout_below="@id/videolayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    <ListView
        android:id="@+id/Lv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></ListView>
    </RelativeLayout>
</RelativeLayout>

@qq_30552993 您好，你说的JCPlayer我看过了，感觉它封装的太多了，他用的是TextureView 显示的视频。我想用Surfaceview显示视频。实在不会整啊 求教