打开使用 Retrofit2 下载的通知点击文件

Posted 2023-04-19

【中文标题】打开使用 Retrofit2 下载的通知点击文件

【英文标题】：Open File on Notification click downloaded using Retrofit2

【发布时间】：2019-07-28 03:51:45

【问题描述】：

我正在使用改造网络服务下载 PDF。然后我显示一个自创建的通知以显示文件已下载。但我无法理解单击通知时如何显示或打开文件。

这是我的通知电话：

RestClient.webServices()
        .downloadFile(id)
        .enqueue(new Callback<ResponseBody>() 
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) 

                if (response.isSuccessful()) 

                    boolean writtenToDisk = writeResponseBodyToDisk(response.body());

                    Log.e(TAG, "file download was a success? " + writtenToDisk);

                    if (writtenToDisk) 

                        showToast("Invoice downloaded successfully");
                        showDownloadNotification();

                    
                
            

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) 

            
        );

这是 writeResponseBodyToDisk() 函数：

private boolean writeResponseBodyToDisk(ResponseBody body) 
    try 
        // todo change the file location/name according to your needs
        File futureStudioIconFile = new File(Environment.getExternalStorageDirectory() + File.separator + "/bill.pdf");

        InputStream inputStream = null;
        OutputStream outputStream = null;

        try 
            byte[] fileReader = new byte[4096];

            long fileSize = body.contentLength();
            long fileSizeDownloaded = 0;

            inputStream = body.byteStream();
            outputStream = new FileOutputStream(futureStudioIconFile);

            while (true) 
                int read = inputStream.read(fileReader);

                if (read == -1) 
                    break;
                

                outputStream.write(fileReader, 0, read);

                fileSizeDownloaded += read;

                // Log.d(TAG, "file download: " + fileSizeDownloaded + " of " + fileSize);
            

            outputStream.flush();

            return true;
         catch (IOException e) 
            return false;
         finally 
            if (inputStream != null) 
                inputStream.close();
            

            if (outputStream != null) 
                outputStream.close();
            
        
     catch (IOException e) 
        return false;
    

这里是 showDownloadNotification() 函数：

void showDownloadNotification() 
    try 
        Uri selectedUri = Uri.parse(Environment.getExternalStorageDirectory() + File.separator + "/invoice.pdf");
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(selectedUri, "resource/folder");
        //            startActivity(intent);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);


        NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.ic_logo_winds)
                .setContentTitle("Invoice downloaded")
                .setContentText("")
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .setPriority(NotificationCompat.PRIORITY_DEFAULT);

        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);

        // notificationId is a unique int for each notification that you must define
        notificationManager.notify(1, builder.build());

     catch (Exception e) 
        Log.e(TAG, "Notification " + e.toString());
    

所以当我点击创建的通知时，什么也没有发生，当我取消注释 startActivity (intent);它通过说找不到意图的活动而崩溃。 如何通过单击我为它创建的通知打开我下载的文件？

【问题讨论】：

你检查过developer.android.com/training/notify-user/navigation

@ashazar 是的，我已经看到，无法从我的通知点击中找到我应该在哪里以及如何打开文件/文件夹

【参考方案1】：

您似乎将错误的数据类型传递给意图 showDownloadNotification() 方法。以下是打开 PDF 的方法：

Uri selectedUri = Uri.parse(Environment.getExternalStorageDirectory() + File.separator + "/invoice.pdf");

Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(selectedUri, "application/pdf"); // here we set correct type for PDF
intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);

PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);