自定义控件，覆写父类如下：

import android.content.Context;
import android.util.AttributeSet;
import android.widget.VideoView;
/**
 * The CustomVideoView is to make videoView view length-width based on the parameters you set to decide.
 * @author peter.
 *
 */
public class CustomVideoView extends VideoView {
	private int mVideoWidth;
    private int mVideoHeight;

    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) {
    	/* The following code is to make videoView view length-width 
    	based on the parameters you set to decide. */
    	int width = getDefaultSize(mVideoWidth, widthMeasureSpec);
        int height = getDefaultSize(mVideoHeight, heightMeasureSpec);
        setMeasuredDimension(width, height);
    }
}

videoView让视频的宽高可以手动设置