视频直播技术（七）：Ijkplayer切换网络时停止播放的问题处理

问题起因：

在进行ijkplayer播放器的测试时，发现ijkplayer播放器在切换网络时出现直播画面停止的问题。

问题分析：

抓取日志发现：tv.danmaku.ijk.media.player.IjkMediaPlayer: Error (-10000,0)

问题解决：

重写OnErrorListener的onError方法，然后判断what = -10000的时候，触发重置播放器的操作

参考内容

ijkplayer_android_def.h ：

// Generic error codes for the media player framework.  Errors are fatal, the
// playback must abort.
//
// Errors are communicated back to the client using the
// MediaPlayerListener::notify method defined below.
// In this situation, 'notify' is invoked with the following:
//   'msg' is set to MEDIA_ERROR.
//   'ext1' should be a value from the enum media_error_type.
//   'ext2' contains an implementation dependant error code to provide
//          more details. Should default to 0 when not used.
//
// The codes are distributed as follow:
//   0xx: Reserved
//   1xx: Android Player errors. Something went wrong inside the MediaPlayer.
//   2xx: Media errors (e.g Codec not supported). There is a problem with the
//        media itself.
//   3xx: Runtime errors. Some extraordinary condition arose making the playback
//        impossible.
//
enum media_error_type {
    // 0xx
    MEDIA_ERROR_UNKNOWN = 1,
    // 1xx
    MEDIA_ERROR_SERVER_DIED = 100,
    // 2xx
    MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK = 200,
    // 3xx

    // -xx
    MEDIA_ERROR_IO          = -1004,
    MEDIA_ERROR_MALFORMED   = -1007,
    MEDIA_ERROR_UNSUPPORTED = -1010,
    MEDIA_ERROR_TIMED_OUT   = -110,

    MEDIA_ERROR_IJK_PLAYER  = -10000,
};