Question

我刚刚开发一款快速Android应用程序。

小问题。什么是州4？

我正在使用MediaPlayer，每次运行应用程序时都会收到错误消息，指出Media Player“start（）”首先在状态0中调用，然后调用状态4.

有谁知道状态4是什么？

如果我知道状态1和2 ......

等状态，我可以找出问题

谢谢，

Answer 1

这是来自Android来源的MediaPlayer.h：

enum media_player_states {
  MEDIA_PLAYER_STATE_ERROR        = 0,
  MEDIA_PLAYER_IDLE               = 1 << 0,
  MEDIA_PLAYER_INITIALIZED        = 1 << 1,
  MEDIA_PLAYER_PREPARING          = 1 << 2,
  MEDIA_PLAYER_PREPARED           = 1 << 3,
  MEDIA_PLAYER_DECODED            = 1 << 4,
  MEDIA_PLAYER_STARTED            = 1 << 5,
  MEDIA_PLAYER_PAUSED             = 1 << 6,
  MEDIA_PLAYER_STOPPED            = 1 << 7,
  MEDIA_PLAYER_PLAYBACK_COMPLETE  = 1 << 8
};

因此0将是MEDIA_PLAYER_STATE_ERROR，4将是MEDIA_PLAYER_PREPARING。你在调用start（）之前调用了prepare（）还是prepareAsync（）？

这些是MediaRecorder声明：

enum media_recorder_states {
  MEDIA_RECORDER_ERROR                 =      0,
  MEDIA_RECORDER_IDLE                  = 1 << 0,
  MEDIA_RECORDER_INITIALIZED           = 1 << 1,
  MEDIA_RECORDER_DATASOURCE_CONFIGURED = 1 << 2,
  MEDIA_RECORDER_PREPARED              = 1 << 3,
  MEDIA_RECORDER_RECORDING             = 1 << 4,
};

因此，对于录制，状态4为MEDIA_RECORDER_DATASOURCE_CONFIGURED。

Android SDK媒体录制器。州4

1 个答案: