Question

我在Android中使用 Mediaplayer 在线播放视频并在 videoview 上显示。视频视图放在具有固定大小的 RelativeLayout 中。

问题是视频的大小（视频的宽度和高度）不适合相对布局，因此我需要调整视频大小以适应内部相对布局，并且视频的比例正好，但它看起来并不像工作，我的代码在这里：

***用于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;
}

***播放视频时获取比率的代码

    @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);

        }

***我的自定义视频观看课程的简称：

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多次调用覆盖函数onMeasure(int, int)，因此我删除了onMeasure(int, int)函数并在旁边函数中调用：setMeasuredDimension(int, int)：{{1}而不是使用public void calculateAdditional(int w, int h){...}，但它也不会影响任何东西。我该怎么做才能调整视频大小，使其与精确的比例完全吻合。

同时尝试更改layoutparams，将视频视图创建为 FILL_PARENT 或 MATCH_PARENT ，但保持错误。

Answer 1

改为使用FILL_PARENT：

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

Videoview测量以精确匹配布局

1 个答案: