符合精确比例布局的视景测度

Question

我使用安卓系统中的Mediaplayer在线播放视频，并将其显示在视频视图上。视频视图放在一个固定大小的RelativeLayout中。

问题是视频的大小(视频的宽度和高度)不适合相对输出，所以我需要调整视频的大小，使其与视频的精确比例相匹配，但似乎不适用，我在这里的代码如下：

*创建视频视图的代码：

    ...
        MyVideoView mVideoView = new MyVideoView(mContext);
                mVideoView.requestFocus();

                RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(
                        RelativeLayout.LayoutParams.WRAP_CONTENT,
                        RelativeLayout.LayoutParams.WRAP_CONTENT);
                mVideoView.setLayoutParams(p);

                return mVideoView;
}

*视频开始播放时获取比率的代码

    @Override
        public void onPrepared(MediaPlayer mediaPlayer) {

            mWebview.removeView(mProgressWheel);
            mediaPlayer.start();

    //        int w = mediaPlayer.getVideoWidth();
    //        int h = mediaPlayer.getVideoHeight();
            int w = mVideoView.getWidth();
            int h = mVideoView.getHeight();

            ((MyVideoView) mVideoView).setDimention(w, h);

        }

*我的自定义视频视图类内容不足：

public class MyVideoView extends VideoView{
    ...
 private ElementObject elm;
private int aW;
        private int aH;
        int additional = 0;
        float ratio = 1f;
private void caculateRatio(int w, int h){

            if(w > h) ratio = (float)w/h;
            else if(h > w) ratio = (float)h/w;
        }

    public void setDimention(int w, int h){
                this.aW = w;
                this.aH = h;
                setIsPlaying(true);

                caculateRatio(w, h);
                calculateAdditional(w, h);
            }
     public void calculateAdditional(int w, int h){
                if(w >= elm.frame.getW() && h < elm.frame.getH()) {
                    additional = elm.frame.getH() - h;
                    measure(w + (int) (additional * ratio), elm.frame.getH());
                }else if(w < elm.frame.getW() && h >= elm.frame.getH()) {
                    additional = elm.frame.getW() - w;
                    measure(elm.frame.getW(), h + (int) (additional * ratio));
                }else if(w < elm.frame.getW() && h < elm.frame.getH()){

                    int wR = elm.frame.getW() - w;
                    int hR = elm.frame.getH() - h;

                    if(wR > hR){
                        additional = wR;
                        measure(elm.frame.getW(), h + (int) (additional * ratio));
                    }else {
                        additional = hR;
                        measure(w + (int) (additional * ratio), elm.frame.getH());
                    }
                }
                else
                    measure(w, h);


            }

@Override
        public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
            //super.setMeasuredDimension(1000,1000);
            setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
        }

}

我发现在视频开始播放之前，重写函数onMeasure(int, int)被多次调用，因此我删除了onMeasure(int, int)函数并调用：setMeasuredDimension(int, int) in side function：public void calculateAdditional(int w, int h){...}，而不是使用measure(int, int)，但它也不会影响任何事情。我能做些什么来调整视频的大小，使之与精确的比率完全吻合。

此外，尝试将创建视频视图的布局参数更改为、FILL_PARENT、或，但始终存在错误。

Answer 1

使用FILL_PARENT代替：

RelativeLayout.LayoutParams p = new RelativeLayout.LayoutParams(
                        RelativeLayout.LayoutParams.FILL_PARENT,
                        RelativeLayout.LayoutParams.FILL_PARENT);