android - DownloadManager 双下载

Question

我遇到以下问题:每当我使用 DownloadManager 下载文件时，它都会被下载两次(以“filename.extension”和“filename-1.extension”的形式保存)。这是我的代码:

public void download() {
        Request request = new Request(Uri.parse(_wrapper.getURL()));
        request.setTitle(getFileName(_wrapper.getURL()));
        request.setVisibleInDownloadsUi(false);
        request.setDestinationInExternalFilesDir(_context, null, "/" + getFileName(_wrapper.getURL()));

        _downloadID = _downloadManager.enqueue(request);
    }



    public BroadcastReceiver getDownloadFinishedBroadcastReceiver() {
        BroadcastReceiver receiver = new BroadcastReceiver() {

            @Override
            public void onReceive(Context pContext, Intent pIntent) {
                String action = pIntent.getAction();
                if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
                    Query query = new Query();
                    query.setFilterById(_downloadID);
                    Cursor cursor = _downloadManager.query(query);
                    if (cursor.moveToFirst()) {
                        File file = new File(ScruloidConstants.APPLICATION_DIRECTORY);
                        int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
                        if (status == DownloadManager.STATUS_SUCCESSFUL) {
                            String path = cursor.getString(cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_FILENAME));
                            _wrapper.setFilePath(path);
                            _wrapper.setLastDownloaded(new Date());
                            if (_listener != null) {
                                _listener.onDownloadProjectTaskFinished(new TaskResult<ProjectWrapper>(_wrapper));
                            }
                        }
                        else if (status == DownloadManager.STATUS_FAILED) {
                            int reason = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_REASON));
                            DownloadFailedException ex = new DownloadFailedException(reason);
                            if (_listener != null) {
                                _listener.onDownloadProjectTaskFinished(new TaskResult<ProjectWrapper>(ex));
                            }
                        }
                    }
                }
            }
        };
        return receiver;
    }

ProjectWrapper _wrapper 只是一个保存数据的简单类，那里没有执行任何逻辑。 _listener 只是在回调方法上显示一点 Toast 消息。我调试了我的应用程序以确保 download() 方法仅被调用一次。我希望你能帮我找到错误。

Answer 1

不幸的是，DownloadManager 存在问题并且无法在所有设备上正常工作。您的问题已在此处报告:https://code.google.com/p/android/issues/detail?id=18462