MediaPlayer setDataSource 失败，状态 = 0x80000000 为 2.3.4 上的文件路径设置的铃声 [英] MediaPlayer setDataSource failed with status=0x80000000 for Ringtone set by filepath on 2.3.4

问题描述

标题说明了大部分内容.

Title says most of it.

我的应用程序一直在播放 uri 指向的铃声，例如 content://media/internal/audio/media/387 或 content://media/external/audio/media/1655(我相信对于 SDcard 上的自定义铃声)同时使用 setDataSource(fileInfo) 和 setDataSource(mContext, Uri.parse(fileInfo)).

My application has been playing ringtones pointed by uri like content://media/internal/audio/media/387 or content://media/external/audio/media/1655 (for custom ringtones on SDcard I believe) using both setDataSource(fileInfo) and setDataSource(mContext, Uri.parse(fileInfo)).

在每种情况下，我都收到了有关 setDataSource failed.: status=0x80000000 异常信息的日志，在使用 Android 4.x(不同版本)的手机上.

In each case I have received logs with information about setDataSource failed.: status=0x80000000 exception on phones using Android 4.x (different versions).

看到错误只发生在由内容 uri 指向的铃声，而不是由路径指向的单个文件，我决定使用铃声的路径以及解决上述手机上的问题(同时仍然使用 setDataSource(mContext, Uri.parse(fileInfo)) )

Seeing that the error happens only to ringtones pointed by content uri, but not to single files pointed by path, I have decided to use paths for ringtones as well which fixed problem on above phones (while still using setDataSource(mContext, Uri.parse(fileInfo)) )

然而，它在使用 Android 2.3.4-2.3.6 的手机上开始出现问题(虽然不是在我的 2.3.3 上):

It has however started problems on phones with Android 2.3.4-2.3.6 (not on mine 2.3.3 though):

• 我收到了一些异常的日志:setDataSource failed.: status=0x80000000 对于路径如 /system/media/audio/ringtones/TwirlAway.ogg

• 我还收到了关于 MediaPlayer.onErrorListener.onError(int what, int extra) 方法调用的日志，带有 what=1 和 extra=-2147483648，据我所知，这表明该文件丢失或已损坏.但是我执行

• I have received few logs with exception: setDataSource failed.: status=0x80000000 for files with paths like /system/media/audio/ringtones/TwirlAway.ogg

• I have also received a log about MediaPlayer.onErrorListener.onError(int what, int extra) method call with what=1 and extra=-2147483648, which, from what I know, suggest either that file is missing or it is corrupted. However I perform

File file = new File(fileInfo);
if (!file.exists())

检查这种情况并返回该文件确实存在 - 那么它是否已损坏?内存中的音乐文件极不可能.

check in such situation and it returned that file does exist - is it corrupted then? Highly unlikely for music file in internal memory.

总结:

• 使用 setDataSource("content://media/internal/audio/media/52")
• 抛出异常:setDataSource failed.: status=0x80000000 for setDataSource(mContext, "/system/media/audio/ringtones/TwirlAway.ogg")

有趣的是，setDataSource(Context context, Uri uri)调用的setDataSource(Context context, Uri uri, Headers headers)方法的前几行是(来自 2.3 的 GrepCode 源代码.4):

Interestingly, first few lines of setDataSource(Context context, Uri uri, Headers headers) method which is called by setDataSource(Context context, Uri uri) are (from GrepCode source for 2.3.4):

 String scheme = uri.getScheme();
     if(scheme == null || scheme.equals("file")) {
         setDataSource(uri.getPath());
         return;
     }

所以，毕竟，它只是针对 setDataSource("/system/media/audio/ringtones/TwirlAway.ogg") 失败了.我已经通过使用从 uris 获取铃声的路径:

So, after all, it just fails for setDataSource("/system/media/audio/ringtones/TwirlAway.ogg"). I have taken paths to ringtones from uris by using:

private static String getRingtonePathFromContentUri(Context context,
        Uri contentUri) {

    String[] proj = { MediaStore.Audio.Media.DATA };
    Cursor ringtoneCursor = context.getContentResolver().query(contentUri,
            proj, null, null, null);
    ringtoneCursor.moveToFirst();
    return ringtoneCursor.getString(ringtoneCursor
            .getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
}

任何想法可能导致错误抛出?也许这些是由于缺乏阅读权限引起的一些问题?我想本机 setDataSource(String path) 函数的源代码会有很大帮助，但我找不到它.

Any ideas what can be causing error throwing? Maybe those are some issues caused by lack of reading permissions? I guess source code for native setDataSource(String path) function would help a lot, but I wasn't able to find it.

推荐答案

下面 Lorne 的回答对处理这个问题最有帮助.

Answer by Lorne below was most helpful when dealing with this problem.

对于其他为此苦苦挣扎的人，这是我使用了 6 个月以上的代码，几乎不再报告错误.

For anyone else struggling with it, here is the code that I have been using for over 6 months now with errors almost not reported anymore.

fileinfo 可以是以下两者(示例):

fileinfo can be both of below (examples):

/system/media/audio/alarms/Walk_in_the_forest.ogg

content://media/internal/audio/media/20

public static void setMediaPlayerDataSource(Context context,
        MediaPlayer mp, String fileInfo) throws Exception {

    if (fileInfo.startsWith("content://")) {
        try {
            Uri uri = Uri.parse(fileInfo);
            fileInfo = getRingtonePathFromContentUri(context, uri);
        } catch (Exception e) {
        }
    }

    try {
        if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.HONEYCOMB)
            try {
                setMediaPlayerDataSourcePreHoneyComb(context, mp, fileInfo);
            } catch (Exception e) {
                setMediaPlayerDataSourcePostHoneyComb(context, mp, fileInfo);
            }
        else
            setMediaPlayerDataSourcePostHoneyComb(context, mp, fileInfo);

    } catch (Exception e) {
        try {
            setMediaPlayerDataSourceUsingFileDescriptor(context, mp,
                    fileInfo);
        } catch (Exception ee) {
            String uri = getRingtoneUriFromPath(context, fileInfo);
            mp.reset();
            mp.setDataSource(uri);
        }
    }
}

private static void setMediaPlayerDataSourcePreHoneyComb(Context context,
        MediaPlayer mp, String fileInfo) throws Exception {
    mp.reset();
    mp.setDataSource(fileInfo);
}

private static void setMediaPlayerDataSourcePostHoneyComb(Context context,
        MediaPlayer mp, String fileInfo) throws Exception {
    mp.reset();
    mp.setDataSource(context, Uri.parse(Uri.encode(fileInfo)));
}

private static void setMediaPlayerDataSourceUsingFileDescriptor(
        Context context, MediaPlayer mp, String fileInfo) throws Exception {
    File file = new File(fileInfo);
    FileInputStream inputStream = new FileInputStream(file);
    mp.reset();
    mp.setDataSource(inputStream.getFD());
    inputStream.close();
}

private static String getRingtoneUriFromPath(Context context, String path) {
    Uri ringtonesUri = MediaStore.Audio.Media.getContentUriForPath(path);
    Cursor ringtoneCursor = context.getContentResolver().query(
            ringtonesUri, null,
            MediaStore.Audio.Media.DATA + "='" + path + "'", null, null);
    ringtoneCursor.moveToFirst();

    long id = ringtoneCursor.getLong(ringtoneCursor
            .getColumnIndex(MediaStore.Audio.Media._ID));
    ringtoneCursor.close();

    if (!ringtonesUri.toString().endsWith(String.valueOf(id))) {
        return ringtonesUri + "/" + id;
    }
    return ringtonesUri.toString();
}

public static String getRingtonePathFromContentUri(Context context,
        Uri contentUri) {
    String[] proj = { MediaStore.Audio.Media.DATA };
    Cursor ringtoneCursor = context.getContentResolver().query(contentUri,
            proj, null, null, null);
    ringtoneCursor.moveToFirst();

    String path = ringtoneCursor.getString(ringtoneCursor
            .getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));

    ringtoneCursor.close();
    return path;
}

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