Android – the layout differs between the graphical layout and the actual device

I have the following XML layout code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:weightSum="10" >

    <VideoView
        android:id="@+id/videoView_player"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="8.5" />

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1.5"
        android:gravity="center"
        android:orientation="vertical" >

        <ImageView
            android:id="@+id/imageView_indicator"
            android:layout_width="50dp"
            android:layout_height="50dp" />

        <ImageButton
            android:id="@+id/imageButton_play"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:src="@android:drawable/ic_media_pause" />
    </LinearLayout>

</LinearLayout>

It appears in my graphic layout as shown below

But on my device, it seems as follows

The area occupied on the right side of the actual equipment is greater than the specified weight. I tried a lot but failed. What's the problem with my code???

resolvent:

It may be adjusted according to the aspect ratio of the video. Place the videoview in another view with the correct weight

Try this Code:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:weightSum="10" >

    <FrameLayout 
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="8.5">

        <VideoView
            android:id="@+id/videoView_player"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

    </FrameLayout>