W/System.err: java.lang.NoSuchMethodError: no non-static method "Ltv/danmaku/ijk/media/player/misc/IAndroidIO;.open(Ljava/lang/String;)I"
W/System.err: at java.lang.Runtime.nativeLoad(Native Method)
at java.lang.Runtime.nativeLoad(Runtime.java:1115)
at java.lang.Runtime.loadLibrary0(Runtime.java:1069)
at java.lang.Runtime.loadLibrary0(Runtime.java:1007)
at java.lang.System.loadLibrary(System.java:1668)
at tv.danmaku.ijk.media.player.IjkMediaPlayer$a.loadLibrary(IjkMediaPlayer.java:178)
W/System.err: at tv.danmaku.ijk.media.player.IjkMediaPlayer.U(IjkMediaPlayer.java:190)
at io.dcloud.media.video.ijkplayer.media.IjkPlayerView._initMediaPlayer(IjkPlayerView.java:353)
at io.dcloud.media.video.ijkplayer.media.IjkPlayerView.init(IjkPlayerView.java:507)
at io.dcloud.media.video.ijkplayer.VideoPlayerView.(VideoPlayerView.java:56)
at io.dcloud.media.video.DHVideoframeItem.(DHVideoframeItem.java:62)
解决办法：
在proguard-rules.pro 中添加
-keep class tv.danmaku.ijk.media.player.** {*;}
混淆问题，注意一定要player.后加两个*，同时看文件中其他的写法，这个问题困扰好久，终于解决了
