Who knows the android mediaplayer states by their int value in LogCat?

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I have an implementation that is using the Android MediaPlayer class. I keep on bumping into various bugs, change the code, bump into another bug. Depending on the bug, I get LogCat error messages reporting back from the MediaPlayer:

"xyz called in state x".

I don't want to post a thread for each bug I bump into, I rather get a hang of it all and fix the bugs myself. But I cannot find any document that would tell me which state number maps to which state, as they are described on the MediaPlayer online documentation.

Can someone post a link to such a list, or provide the list right here in this post? I think I would not be the only one that would appreciate that.

These are the states currently declared in mediaplayer.h on the master branch of the AOSP:

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_STARTED            = 1 << 4,
    MEDIA_PLAYER_PAUSED             = 1 << 5,
    MEDIA_PLAYER_STOPPED            = 1 << 6,
    MEDIA_PLAYER_PLAYBACK_COMPLETE  = 1 << 7
};

User Michael, java android tcp httpsurlconnection asked Jan 12 '16 at 16:09. stackoverflow.com Who knows the android mediaplayer states by their int value in LogCat? Note: Tag names greater than 23 characters are truncated in the logcat output. Logcat message format. Every Android log message has a tag and a priority associated with it. The tag of a system log message is a short string indicating the system component from which the message originates (for example, ActivityManager). A user-defined tag can be

Building on Michael's answer, here are the declared states with decimal values added for each of the shifted bits. Yeah, they're trivial to calculate, but this saves the extra step when resolving LogCat messages.

enum media_player_states {
    MEDIA_PLAYER_STATE_ERROR        = 0,        //   0
    MEDIA_PLAYER_IDLE               = 1 << 0,   //   1
    MEDIA_PLAYER_INITIALIZED        = 1 << 1,   //   2
    MEDIA_PLAYER_PREPARING          = 1 << 2,   //   4
    MEDIA_PLAYER_PREPARED           = 1 << 3,   //   8
    MEDIA_PLAYER_STARTED            = 1 << 4,   //  16
    MEDIA_PLAYER_PAUSED             = 1 << 5,   //  32
    MEDIA_PLAYER_STOPPED            = 1 << 6,   //  64
    MEDIA_PLAYER_PLAYBACK_COMPLETE  = 1 << 7    // 128
};

User AudioDroid, programming in Java (applet & android) after work. P.S.: This is the 6 Who knows the android mediaplayer states by their int value in LogCat? 5 Wav File As � 6 Who knows the android mediaplayer states by their int value in LogCat? Mar 13 '15. 6 Callback functions in C++ Dec 14 '10. 5 Wav File As Frequency Image Nov 18 '10.

http://developer.android.com/reference/android/media/MediaPlayer.html

For example

public static final int MEDIA_ERROR_IO

Added in API level 17 File or network related operation errors.

Constant Value: -1004 (0xfffffc14)

stackoverflow, Who knows the android mediaplayer states by their int value in LogCat? 发表于2019-6-12 | | 暂无分类. I have an implementation that is using the Android� android,onclick,media-player,android-mediaplayer,onpause I am a noob programer and I encountered a problem, I have a mediaplayer.start() inside an onClick method, if i call mediaplayer.stop(); mediaplayer.reset(); mediaplayer.release(); it will crash and get the error: Attempt to invoke virtual method 'void android.media.MediaPlayer.stop()' on

MediaPlayer, void setAudioStreamType(int streamtype); void setDataSource(Context context, Uri uri); void prepare(); void The MediaPlayer usage is mainly based on the State diagram: This value is very little useful, when the maximum value for the stream is not known: There is a helper function from MediaPlayer class to do this. Enter floating-point values with large decimal fractions (for example, 1.6753456) Divide a number by zero. Leave one or both of the EditText elements empty, and try any calculation. Click the Logcat tab at the bottom of the Android Studio window to open the Logcat pane (if it is not already open). Examine the stack trace at the point where the

Logging and using Logcat, The default value is 16. It is helpful to filter the logcat output because there are many messages which are not of interest. filters to show messages which are of interest, as well as filter out well-known log lines which can safely be ignored. Used to indicate higher-level information about the state of the application. Add buttonBaby.xml to the drawable directory to define the button states for the new child image. In AnimalSounds2.java, import required new classes such as android.widget.ImageView, android.media.MediaPlayer, and java.util.Random.

Due to smart-cast and the null check, the Kotlin compiler knows that the string value is non-null so it allows you to use the reference directly, without the need for the safe call operator.?: Elvis operator. This operator allows you to state "if the object is non-null, return the object; otherwise, return something else".

Comments
  • Many thanks. How did you find the link? I googled like crazy. If there is a nice search function to browse the actual headers of the framework...it can't get any better than that. :-)
  • "How did you find the link?" I used to work with customizing the Android audio framework for a living a few years ago.
  • Can you see how I'm bowing my head? :-D