VideoView视频播放宽高比例自适应

原创于 2022-03-10 16:13:31 发布 · 3.5k 阅读

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#音视频 #videoView #宽高自适应

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该博客介绍了如何使用VideoView在Android中实现视频播放的宽高比例自适应。通过监听OnPreparedListener，在视频准备就绪后计算视频的宽高比，并调整VideoView的宽度以保持原始比例。代码中包含了重新设置VideoView宽度的方法，确保视频在不同尺寸的屏幕上正确显示。

VideoView视频播放宽高比例自适应：

 videoView.setOnPreparedListener(object : MediaPlayer.OnPreparedListener {
     override fun onPrepared(mp: MediaPlayer) {
         // 计算视频的宽高比例来修改videoView的大小
         calculateView(videoView,mp.videoWidth,mp.videoHeight)
         // 准备好自动播放
         videoView.start()
     }
 })

private fun calculateView(videoView:VideoView,videoWidth: Int,videoHeight:Int){
    var videoViewWidth = videoView.width
    var videoViewHeight = videoView.height

    if(videoWidth < videoViewWidth && videoHeight >= videoViewHeight){
        var rate:Float = videoHeight.toFloat()/videoWidth.toFloat()
        var newvideoWidth = videoViewHeight/rate
        reSetVideoViewWidth(videoView,newvideoWidth.toInt())
    }else if(videoWidth > videoViewWidth && videoHeight >= videoViewHeight){
        var rate:Float = videoHeight.toFloat()/videoWidth.toFloat()
        var newvideoWidth = videoViewHeight/rate
        reSetVideoViewWidth(videoView,newvideoWidth.toInt())
    }
}

private fun reSetVideoViewWidth(videoView:VideoView,newWidth:Int){
    var lp = videoView.layoutParams
    lp.width = newWidth;
    videoView.layoutParams = lp
}