Question

下面的代码运行正常。它从firebase存储中下载pdf文件并将其保存在设备内部存储中。这里似乎遇到的麻烦是我在Android设备监视器中找不到下载的文件。

btnDownload.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    final String magazineUrl= magazineUri[0];

                    new Thread(new Runnable(){
                        @Override
                        public void run() {
                            try {

                                FirebaseStorage storage = FirebaseStorage.getInstance();
                                // Creating a reference to the link
                                StorageReference httpsReference = storage.getReferenceFromUrl(magazineUrl);

                                File file;
                                file=new File(mContext.getFilesDir(),"DownloadedMagazines.pdf");

                                httpsReference.getFile(file).addOnSuccessListener(new OnSuccessListener<FileDownloadTask.TaskSnapshot>() {
                                    @Override
                                    public void onSuccess(FileDownloadTask.TaskSnapshot taskSnapshot) {

                                        System.out.println("It has been downloaded");
                                        // Local temp file has been created
                                    }
                                }).addOnFailureListener(new OnFailureListener() {
                                    @Override
                                    public void onFailure(@NonNull Exception exception) {
                                        // Handle any errors
                                        System.out.println("It has failed to download");

                                    }
                                });
                            }catch (final Exception e) {
                                System.out.println("Error : Please check your internet connection " + e);
                            }
                        }
                    }).start();


                }
            });

我的问题是，文件存储在哪里？有没有办法检索下载文件的路径？

Answer 1

您的文件存储在应用程序的私人目录中。如果要将文件保存在公共目录中，请使用：

File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES); // For example
File file = new File(path, "DownloadedMagazines.pdf");

您可以使用Environment.DIRECTORY_DOWNLOADS或Environment.DIRECTORY_DOCUMENTS以及其他人......

注意，您需要WRITE_EXTERNAL_STORAGE权限，并且从KITKAT开始，读取权限需要READ_EXTERNAL_STORAGE

我找不到从firebase下载到内部存储的文件

1 个答案: