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我正在开发一个允许用户导入视频并对其进行编辑的应用程序。这些应用程序允许用户导入本地视频，或从 Google 相册或云端硬盘导入视频。以下代码正在运行

Intent i = new Intent();
i.setType("video/mp4");
i.setAction(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(i, REQUEST_CODE);

然后，在 onActivityResult 方法上，我从照片或云端硬盘复制到文件

if (resultCode == RESULT_OK) {
    Uri uri = data.getData();

    try {
       File storage = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES);
       File app_directory = new File(storage, APP_NAME);
       if (!app_directory.exists())
           app_directory.mkdirs();

       String timestamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date());
       String filename = String.format("VID_%s.mp4", timestamp);

       File file = new File(app_directory, filename);

       InputStream is = getContentResolver().openInputStream(uri);

       OutputStream output = new FileOutputStream(file);

       byte[] buffer = new byte[4096];
       int read;

       while ((read = is.read(buffer)) != -1)
            output.write(buffer, 0, read);

       output.flush();
       output.close();
    } catch (FileNotFoundException e) {
       Toast.makeText(this, "File Not Found", Toast.LENGTH_LONG).show();
       Log.e(TAG, "File Not Found", e);
    } catch (IOException e) {
       Toast.makeText(this, "Could not save the file", Toast.LENGTH_LONG).show();
       Log.e(TAG, "IOException", e);
    }
}

然而，自从谷歌照片应用程序的最新更新以来，我只得到了一个非常小的文件，我无法用任何应用程序打开，有时对于最旧的视频，我得到一个 FileNotFoundException

我尝试了几种解决方案，例如更改请求这样的文件的意图

Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.setType("video/mp4");
startActivityForResult(i, REQUEST_CODE);

或通过 FileDescriptor 获取 InputStream

ParcelFileDescriptor parcelFileDescriptor = getContentResolver().openFileDescriptor(uri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();

InputStream is = new FileInputStream(fileDescriptor);

结果相同

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