如何使用下載管理器獲取下載的文件路徑

Question

我可以使用下載管理器從服務器下載視頻。 但是，當我使用以下代碼記錄路徑時。

 String path = Environment.getExternalStoragePublicDirectory(directory).getAbsolutePath() + subpath;
 Log.e("PATH", path);

我得到

12-15 13:29:36.787 22807-22807/com.ezyagric.extension.android E/PATH：/storage/sdcard0/EZYAGRIC/Soil Testing.mp4。

現在這與手機上的路徑不同

/storage/sdcard0/Android/data/com.ezyagric.extension.android/files/EZYAGRIC/Crop Insurance.mp4

是什么帶來了這種差異，如何才能獲得手機中的路徑？

Answer 1

用於在默認下載目錄中下載文件的代碼片段。

DownloadManager.Request dmr = new DownloadManager.Request(Uri.parse(url));

// If you know file name
String fileName = "filename.xyz"; 

//Alternative if you don't know filename
String fileName = URLUtil.guessFileName(url, null,MimeTypeMap.getFileExtensionFromUrl(url));

dmr.setTitle(fileName);
dmr.setDescription("Some descrition about file"); //optional
dmr.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
dmr.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
dmr.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
DownloadManager manager = (DownloadManager) mContext.getSystemService(Context.DOWNLOAD_SERVICE);
manager.enqueue(dmr);

注意對於mContext.getSystemService

• 活動= getSystemService();
• 片段= getActivity.getSystemService();
• 適配器= mContext.getSystemService(); //pass context in adapter mContext.getSystemService(); //pass context in adapter

更新

由於 OP 想要檢查文件是否存在

File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), fileName); 
if(file.exists()){//File Exists};

Answer 2

您應該嘗試在下載文件夾中下載

        String url = "url you want to download";
        DownloadManager.Request request = new 
        DownloadManager.Request(Uri.parse(url));
        request.setDescription("Some descrition");
        request.setTitle("Some title");
        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "name-of-the-file.ext");

        // get download service and enqueue file
        DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
        manager.enqueue(request);

Answer 3

當您在設置路徑之前調用 --> downloadManager.enqueue(request)方法時

request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS,"Google.gif");

File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS),"google.gif"); // Set Your File Name
if (file.exists()) {
    Bitmap myBitmap = BitmapFactory.decodeFile(file.getAbsolutePath());
    pro28_imageView.setImageBitmap(myBitmap);
}