How to convert the uri to inputStream data and upload the stream data into server?

In the below code i have passed the uri into the inputstream and and then crated the file and inputStream data are written in outputstream.This works 100% try this method.

@Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (resultCode == Activity.RESULT_OK) {            if (requestCode == PICK_FILE_REQUEST) if (data != null) {                //no data present                Uri uri = data.getData();                String filePath = data.getData().getPath();                String name = getContentName(getContentResolver(), uri);             File   file = new File(getCacheDir(),name);                int maxBufferSize = 1 * 1024 * 1024;                try {                  InputStream  inputStream = getContentResolver().openInputStream(uri);                    Log.e("InputStream Size","Size " + inputStream);                  int  bytesAvailable = inputStream.available();//                    int bufferSize = 1024;                   int bufferSize = Math.min(bytesAvailable, maxBufferSize);                    final byte[] buffers = new byte[bufferSize];                    FileOutputStream outputStream = new FileOutputStream(file);                    int read = 0;                    while ((read = inputStream.read(buffers)) != -1) {                        outputStream.write(buffers, 0, read);                    }                    Log.e("File Size","Size " + file.length());                    inputStream.close();                    outputStream.close();                    file.getPath();                    Log.e("File Path","Path " + file.getPath());                    file.length();                    Log.e("File Size","Size " + file.length());                    if(file.length() > 0){                        attachementImage.setVisibility(View.INVISIBLE);                    }                } catch (FileNotFoundException e) {                    e.printStackTrace();                } catch (IOException e) {                    e.printStackTrace();                }                try {                    bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), uri);                } catch (IOException e) {                    e.printStackTrace();               }                imageView.setImageBitmap(bitmap);                attachFile.addView(imageView);                attachFile.addView(textView);                return;            }        }}