Question

听起来很傻吧？我有一个带有物品卡的RecyclerView。这些卡具有一个按钮，该按钮在另一个RecyclerView中显示PopupWindow列出“附件”。这些附件卡有一个按钮，您可以在其中下载它们，并且应该在进度栏中显示下载进度。

现在，当执行并行asynctask下载时，我不知道刷新进度条的正确方法。

基本上，我有一个带有进度侦听器的asyncTask，用于更新AttachmentData对象（与附件卡关联的数据）中的进度字段。持有人应该阅读AttachmentData进度并更新进度栏...

...在回收者视图中该项目的弹出窗口中。

我的问题是，每当我在其他AsyncTask之上启动一个新的asyncTask时，最新的asyncTask就会拦截前一个的所有进度，而不是三个附件显示其各自的进度，而是有两个附件显示其冻结的进度（直到单击了第三个附件为止），第三个附件显示了三个附件的进度，每当其中一个附件更新其进度时都会刷新。

这很令人困惑。

问题是，我有理由怀疑它与RecyclerView无关，因为我发送的通知的行为完全像这样。

在ViewHolder中绑定数据时，一切都会发生

  public <T extends DownloadableData> void bindData(T data, ItemProgressListener ipl) {
    this.data = data;
    this.ipl = ipl;

//....
    button.setOnClickListener(v->openDoc());

//....
}


public void openDoc(){
                data.pdfStatus = PDF_DOWNLOADING;


                NotificationCompat.Builder builder = new NotificationCompat.Builder(parentFragment.getActivity(), CHANNEL_ID)
                        .setSmallIcon(R.drawable.logo_white)
                        .setContentTitle("Downloading " + data.title)
                        .setContentText("Current Progress: " + data.progress + " %")
                        .setPriority(NotificationCompat.PRIORITY_DEFAULT)
                        .setStyle(new NotificationCompat.BigTextStyle()
                                .bigText("Current Progress: " + data.progress + " %"))
                        .setAutoCancel(false);

                int PROGRESS_MAX = 100;
                builder.setProgress(PROGRESS_MAX, 0, false);


                int notificationId = Integer.parseInt(data.uuid);
                // notificationId is a unique int for each notification that you must define
                notificationManager.notify(notificationId, builder.build());

                CloudManager.PaperDownloader pd = new CloudManager.PaperDownloader() {
                    @Override
                    public String getFilePath() {
                        return data.filepath;
                    }

                    @Override
                    public void progressUpdate(Integer... values) {

                        data.pdfStatus = PDF_DOWNLOADING;
                        data.setProgress(values[0]);

                        if ((values[0] % 5 == 1 || values[0] == 100) && data.previousProgress < data.progress) {
                            if (ipl != null)
                                ipl.onItemProgressChanged(position, data);

                            builder.setContentText("Current Progress: " + values[0] + " %")
                                    .setStyle(new NotificationCompat.BigTextStyle()
                                            .bigText("Current Progress: " + values[0] + " %"))
                                    .setProgress(PROGRESS_MAX, values[0], false);
                            notificationManager.notify(notificationId, builder.build());
                        }

                    }

                    @Override
                    public void downloadSuccess(Integer... positions) {
                        data.pdfStatus = PDF_DOWNLOADED;
                        data.setProgress(100);
                        if (ipl != null)
                            ipl.onItemProgressChanged(position, data);

                        builder.setStyle(new NotificationCompat.BigTextStyle()
                                .bigText("Current Progress: 100 %"))
                                .setProgress(0, 0, false);

                        notificationManager.notify(notificationId, builder.build());
                        notificationManager.cancel(notificationId);


                    }

                    @Override
                    public void downloadCancelled(String errorMessage) {
                        data.pdfStatus = PDF_DOWNLOAD_CANCELLED;
                        data.setProgress(-1);
                        if (ipl != null)
                            ipl.onItemProgressChanged(position, data);

                        builder.setStyle(new NotificationCompat.BigTextStyle()
                                .bigText("Operation has been cancelled!:\n" + errorMessage))
                                .setProgress(0, 0, false);

                        notificationManager.notify(notificationId, builder.build());


                    }

                    @Override
                    public void downloadFailed(String errorMessage) {
                        data.pdfStatus = PDF_DOWNLOAD_FAILED;
                        data.setProgress(-1);
                        if (ipl != null)
                            ipl.onItemProgressChanged(position, data);

                        builder.setStyle(new NotificationCompat.BigTextStyle()
                                .bigText("Operation has been cancelled!:\n" + errorMessage))
                                .setProgress(0, 0, false);

                        notificationManager.notify(notificationId, builder.build());


                    }
                };


                try {
                    String finalPath = cloudManager.getRemoteFilePath(data.filepath, true);

                    cloudManager.getArticlePdfDownloader(pd)
                          .executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, finalPath);


                } catch (NullPointerException npe) {
                    npe.printStackTrace();
                    parentFragment.alert(context.getString(R.string.alert_cloud_not_set));
                }

}

为了清楚起见，“ ipl”是适配器传递给Holder的另一个接口，试图让我在下载进行时更新尽可能少的卡。定义ipl的最懒/最愚蠢的方式是：

 adapter.setOnItemProgressListener((position, data)->adapter.notifyDataSetChanged());

最后，bindData由适配器调用

@Override
public void onBindViewHolder(@NonNull AbstractDownloadableHolder holder, int position) {
    DownloadableData currentPaper = this.dataList.get(position);

    holder.bindData(currentPaper, ipl);
}

PopupWindow的RecyclerView中的项目的ProgressBar作为RecyclerView的项目的下拉列表

0 个答案: