菜鸟新闻1--自定义VideoView实现欢迎页

public class CustomVideoView extends VideoView {
    public CustomVideoView(Context context) {
        super(context);
    }
    public CustomVideoView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public CustomVideoView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        //重点。
        int width = getDefaultSize(0, widthMeasureSpec);
        int height = getDefaultSize(0, heightMeasureSpec);
        setMeasuredDimension(width, height);
    }
    @Override
    public void setOnPreparedListener(MediaPlayer.OnPreparedListener l) {
        super.setOnPreparedListener(l);
    }
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        return super.onKeyDown(keyCode, event);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <com.cniao5.app36kr_cnk.widget.CustomVideoView
        android:id="@+id/welcome_videoview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:clickable="false"
        android:focusable="false"
        android:focusableInTouchMode="false"
        />
     <Button
         android:id="@+id/welcome_button"
         android:layout_marginBottom="30dp"
         android:layout_centerHorizontal="true"
         android:layout_alignParentBottom="true"
         android:text="进入菜鸟新闻1.0"
         android:textSize="16sp"
         android:textColor="@color/color_white"
         android:layout_width="150dp"
         android:layout_height="40dp"
         android:background="@drawable/head_bt_bg"/>
</RelativeLayout>

welcome_videoview = (CustomVideoView) this.findViewById(R.id.welcome_videoview);
welcome_videoview.setVideoURI(Uri.parse("android.resource://"+this.getPackageName()+"/"+R.raw.kr36));
welcome_videoview.start();
welcome_videoview.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
    @Override
    public void onCompletion(MediaPlayer mp) {
        welcome_videoview.start();

    }
});