Question

i use the following code for downloading a file from the internet. using this code i have a progress dialog

private void startDownload() {
        String url = tv.getText().toString();
        new DownloadFileAsync().execute(url);
    }

    class DownloadFileAsync extends AsyncTask<String, String, String>  {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            showDialog(DIALOG_DOWNLOAD_PROGRESS);
        }

        @Override
        protected String doInBackground(String... aurl) {
            int count;

            try {

                URL url = new URL(aurl[0]);
                URLConnection conexion = url.openConnection();
                conexion.connect();

                int lenghtOfFile = conexion.getContentLength();
                Log.d("ANDRO_ASYNC", "Lenght of file: " + lenghtOfFile);

                InputStream input = new BufferedInputStream(url.openStream());
                OutputStream output = new FileOutputStream(
                        "data/data/com.xxxxxxxx.android/app_p_pic/"
                                + "blabla" 
                byte data[] = new byte[1024];

                long total = 0;

                while ((count = input.read(data)) != -1) {
                    total += count;
                    publishProgress("" + (int) ((total * 100) / lenghtOfFile));
                    output.write(data, 0, count);
                }

                output.flush();
                output.close();
                input.close();
            } catch (Exception e) {

                e.printStackTrace(); 

            }
            return null;

        }

        protected void onProgressUpdate(String... progress) {
            Log.d("ANDRO_ASYNC", progress[0]);
            mProgressDialog.setProgress(Integer.parseInt(progress[0]));
        }

        @Override
        protected void onPostExecute(String unused) {
            dismissDialog(DIALOG_DOWNLOAD_PROGRESS);
        }


    }
}

is there a way of using the above code to transfer a file from say internal to sd? at the momment i use the following code but iv been unable to get the progress to work with progress bar

protected void ontrans() {
        String title = tv.getText().toString();

        try {

            myInput = new FileInputStream(title);


            File directory = new File(Environment.getExternalStorageDirectory()
                    + "/android_files/data/secure");
            if (!directory.exists()) {
                directory.mkdirs();
            }

            OutputStream myOutput = new FileOutputStream(
                    Environment.getExternalStorageDirectory()
                            + "/android_files/data/secure/" + chosenFile);

            byte[] buffer = new byte[1024];
            int length;
            while ((length = myInput.read(buffer)) > 0) {
                myOutput.write(buffer, 0, length);
            }

            myOutput.flush();

            myOutput.close();

            myInput.close();
            Toast.makeText(File_exActivity.this, "file move Succesfully!",
                    Toast.LENGTH_SHORT).show();
            showDialog(11);
        } catch (FileNotFoundException e) {
            Toast.makeText(File_exActivity.this, "no file found!",
                    Toast.LENGTH_LONG).show();

            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            Toast.makeText(File_exActivity.this, "move unsuccesfull!",
                    Toast.LENGTH_LONG).show();

            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

Answer 1

Things to think about: you can get the size of the source file File.length() and destination. Comparing them to display the difference in the progress bar.

The File.length() method returns the following according to the javadoc:

The length, in bytes, of the file denoted by this abstract pathname,
or 0L if the file does not exist. Some operating systems may return 0L
for pathnames denoting system-dependent entities such as devices or
pipes.