先看下mediaplayer.h對error型別的定義：

// 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
};
 

常見錯誤型別

1. -2147483648 未知錯誤

例如log輸出：

MediaPlayer: error (1, -2147483648)

error的第一個引數1表示未知錯誤。

錯誤碼-2147483648是十進位制表示的，對應16進位制的0x80000000。

它定義在檔案：/frameworks/native/include/utils/Errors.h

UNKNOWN_ERROR       = 0x80000000,

此錯誤一般是在framework的libmediaplayerservice，libstagefright目錄中丟擲的。

在執行某個動作時被取消或者中斷，就會丟擲此錯誤。

也是一個通用錯誤，在不知道錯誤原因時，也可以丟擲此錯誤。

2. -107 網路連結錯誤

例如log輸出：

MediaPlayer: error (1, -107)