我从url下载了一些铃声，我正在尝试设置为铃声。
下载方法

public void downloadRingtones(Uri uri, String title) {
    request = new DownloadManager.Request(uri);
    //String title = URLUtil.guessFileName(String.valueOf(uri), null, null);
    request.setTitle(title);
    request.setDescription("Downloading  File please wait...");
    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
    request.setDestinationInExternalPublicDir(Environment.DIRECTORY_RINGTONES, title);

    downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
    id = downloadManager.enqueue(request);
    //String s = downloadManager.getMimeTypeForDownloadedFile(id);
    Toast.makeText(this, "Downloading...", Toast.LENGTH_SHORT).show();
}

试验方法和类型测定方法

public int setType(String type, ContentValues values) {
    if (type.equals("ringtone")) {
        values.put(MediaStore.Audio.Media.IS_RINGTONE, true);
        return RingtoneManager.TYPE_RINGTONE;
    } else if (type.equals("alarm")) {
        values.put(MediaStore.Audio.Media.IS_ALARM, true);
        return RingtoneManager.TYPE_ALARM;
    } else if (type.equals("notif")) {
        values.put(MediaStore.Audio.Media.IS_NOTIFICATION, true);
        return RingtoneManager.TYPE_NOTIFICATION;
    } else if (type.equals("person")) {
        setPersonalRingtone(downloaded_uri);
    }
    return -1;
}

设置方法（如果由于broadcastreceiver下载完成，则启动方法）

public void setRingtone(Uri mUri, String title, String type) {
    downloadRingtones(mUri, title);
    broadcastReceiver.setDownloadCompletedListener(uri -> {

        ContentValues values = new ContentValues();
        File file = new File(uri.getPath());
        downloaded_uri = uri;
        String uri_id = downloaded_uri.getLastPathSegment();
        int set_type = setType(type, values);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
            if (!Settings.System.canWrite(this)) {
                Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
                startActivity(intent);
            } else {
                values.put(MediaStore.Audio.Media._ID, uri_id);
                values.put(MediaStore.Audio.Media.DISPLAY_NAME, title);
                values.put(MediaStore.Audio.Media.MIME_TYPE, "audio/mpeg");
                Uri tempUri = MediaStore.Audio.Media.getContentUri(MediaStore.VOLUME_EXTERNAL);
                Uri newUri = getBaseContext().getContentResolver()
                        .insert(tempUri, values);
                RingtoneManager.setActualDefaultRingtoneUri(this, set_type, newUri);
                Toast.makeText(this, "Ringtone Set", Toast.LENGTH_SHORT).show();
            }
        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            if (!Settings.System.canWrite(this)) {
                Intent intent = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
                startActivity(intent);
            } else {
                values.put(MediaStore.MediaColumns.DATA, file.getAbsolutePath());
                values.put(MediaStore.MediaColumns.TITLE, title);
                values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mpeg");
                Uri tempUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
                IslamicRingtonesMainActivity.this.getContentResolver()
                        .delete(tempUri, MediaStore.MediaColumns.DATA + "=\"" + file.getAbsolutePath() + "\"", null);
                Uri newUri = IslamicRingtonesMainActivity.this.getContentResolver()
                        .insert(tempUri, values);
                RingtoneManager.setActualDefaultRingtoneUri(this, set_type, newUri);
                Toast.makeText(this, "Ringtone Set", Toast.LENGTH_SHORT).show();
            }
        } else {
            values.put(MediaStore.MediaColumns.DATA, file.getAbsolutePath());
            values.put(MediaStore.MediaColumns.TITLE, title);
            values.put(MediaStore.MediaColumns.MIME_TYPE, "audio/mpeg");
            Uri tempUri = MediaStore.Audio.Media.getContentUriForPath(file.getAbsolutePath());
            IslamicRingtonesMainActivity.this.getContentResolver()
                    .delete(tempUri, MediaStore.MediaColumns.DATA + "=\"" + file.getAbsolutePath() + "\"", null);
            Uri newUri = IslamicRingtonesMainActivity.this.getContentResolver()
                    .insert(tempUri, values);
            RingtoneManager.setActualDefaultRingtoneUri(this, set_type, newUri);
            Toast.makeText(this, "Ringtone Set", Toast.LENGTH_SHORT).show();
        }
    }, request, downloadManager, id);
}

我的广播接收机

public class DownloadBroadcastReceiver extends BroadcastReceiver {
private downloadCompletedListener completedListener;
DownloadManager downloadManager;
DownloadManager.Request request;
long id;

@Override
public void onReceive(Context context, Intent intent) {
    if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(intent.getAction())) {
        if(id > 0){
            completedListener.onDownloaded(downloadManager.getUriForDownloadedFile(id));
        }
    }
}

public interface downloadCompletedListener {
    void onDownloaded(Uri uri);
}

public void setDownloadCompletedListener(downloadCompletedListener listener, DownloadManager.Request request, DownloadManager downloadManager, long id) {
    this.completedListener = listener;
    this.request = request;
    this.downloadManager = downloadManager;
    this.id = id;
}

当我进入铃声设置（手机设置）时，我会看到我设置为铃声的歌曲名称，但当有人打电话给我时，它不会播放任何内容。提前感谢你的帮助。