android Ringtone API,为什么RingtoneManager.setActualDefaultRingtoneUri无法正常工作？ [android API-8]...

好的，我和你有同样的问题。我假设您传入的Uri是您资产中的文件，或者是您存储在首选项文件中的磁盘。在这个假设下工作，问题是你不能将Uri推入RingtoneManager并期望它接受它。文件uri应该来自内容解析器。

我很乐意，如果有人能告诉我为什么会这样，但我不是专家，所以我现在就接受它。话虽这么说，这段代码将让你采取一个Uri并将其设置为默认铃声。

//We get the Uri here fro ma file's absolute path.

Uri ringtoneUri = Uri.parse(file.getAbsolutePath());

//We now create a new content values object to store all the information

//about the ringtone.

ContentValues values = new ContentValues();

values.put(MediaStore.MediaColumns.DATA, chosenFile.getAbsolutePath());

values.put(MediaStore.MediaColumns.TITLE, chosenFile.getName());

values.put(MediaStore.MediaColumns.SIZE, chosenFile.length());

values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mp3");

values.put(AudioColumns.ARTIST, context.getString(R.string.app_name));

values.put(AudioColumns.IS_RINGTONE, true);

values.put(AudioColumns.IS_NOTIFICATION, false);

values.put(AudioColumns.IS_ALARM, false);

values.put(AudioColumns.IS_MUSIC, false);

//Work with the content resolver now

//First get the file we may have added previously and delete it,

//otherwise we will fill up the ringtone manager with a bunch of copies over time.

Uri uri = MediaStore.Audio.Media.getContentUriForPath(chosenFile.getAbsolutePath());

context.getContentResolver().delete(uri, MediaStore.MediaColumns.DATA + "=\"" + chosenFile.getAbsolutePath() + "\"", null);

//Ok now insert it

Uri newUri = context.getContentResolver().insert(uri, values);

//Ok now set the ringtone from the content manager's uri, NOT the file's uri

RingtoneManager.setActualDefaultRingtoneUri(

context,

RingtoneManager.TYPE_RINGTONE,

newUri

);