Convert android Uri to java File Android Studio

Question

I have an Intent of ACTION_GET_CONTENT in my app and I need to put the picked file ( there will be different files, ppt, doc...) in a java.io File.

I'm able to get the data and put it into a android.net Uri. Is there a way I ca create a java File from this Uri?

I need it to be a file in order to upload it do google drive using the google drive API

This is the code to upload to the drive, I need to convert the uri to a temporary file in order to pass it as the javaFile of this method

 public Task<File> uploadFileWithMetadata(java.io.File javaFile, boolean isSlide,  @Nullable final String folderId, PostFileHolder postFileHolder) {
        return Tasks.call(mExecutor, () -> {

            Log.i("upload file", "chegou" );

            String convertTo; // string to convert to gworkspace
            if(isSlide){
                convertTo = TYPE_GOOGLE_SLIDES;
            }
            else{
                convertTo = TYPE_GOOGLE_DOCS;
            }

            List<String> folder;
            if (folderId == null) {
                folder = Collections.singletonList("root");
            } else {
                folder = Collections.singletonList(folderId);
            }

            File metadata = new File()
            .setParents(Collections.singletonList(folderId))
            .setName(postFileHolder.getDisplayName())
            .setMimeType(convertTo);

            Log.i("convert to: ", convertTo );

            // the convert to is the mimeType of the file, withg gworkspace it is a gdoc or gslide, with others is the regular mimetype
            FileContent mediaContent = new FileContent(postFileHolder.getConvertTo(), javaFile);

            Log.i("media content", "chegou" );
            // até aqui com gworkspace chega
            File uploadedFile = mDriveService.files().create(metadata, mediaContent)
                    .setFields("id")
                    .execute();

            Log.i("File ID: " , uploadedFile.getId());

            return uploadedFile;
        });
}

This is my code to get the Uri

 case REQUEST_CODE_FILE_PICKER:

                    // get uri from file picked
                    Uri url = data.getData();
                    break;
}

Answer 1

Solved it!

Here's how I did it:

        // my uri
        Uri fileUri = Uri.parse(postFileHolder.getFileUri());
        
        // create a null InputSream
        InputStream iStream = null;
        try {
            // create a temporary file
            File fileToUpload = File.createTempFile("fileToUpload", null, this.getCacheDir());
          
            iStream = getContentResolver().openInputStream(fileUri);
            
           // use function to get the bytes from the created InputStream
            byte[] byteData = getBytes(iStream);

            convert byteArray to File
            FileOutputStream fos = new FileOutputStream(fileToUpload);
            fos.write(byteData);
            fos.flush();
            fos.close();

            if(fileToUpload == null){
                Log.i("create file", "null");
            }
            else{
                Log.i("create file", "not null:  "+ fileToUpload.getTotalSpace());
                getEGDrive(fileToUpload);
            }
}
 catch (FileNotFoundException e) {
                Log.i("error create file uri", e.getLocalizedMessage());

                e.printStackTrace();
            } catch (IOException e) {
                Log.i("error create file uri", e.getLocalizedMessage());

                e.printStackTrace();
            }

And here's the function to transform the InputStream into byteArray:

 public byte[] getBytes(InputStream inputStream) throws IOException {
        ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
        int bufferSize = 1024;
        byte[] buffer = new byte[bufferSize];

        int len = 0;
        while ((len = inputStream.read(buffer)) != -1) {
            byteBuffer.write(buffer, 0, len);
        }
        return byteBuffer.toByteArray();
    }

Got big part of the answer from: https://stackoverflow.com/a/10297073/14990708