Bdtjtk

Hi I am using a function that looks like this. It converts a string to URL's

protected URL stringToURL(String urlString) {

    try {

        URL url = new URL(urlString);

        return url;

    } catch (MalformedURLException e) {

        e.printStackTrace();

    }

    return null;

}

and sample use of that is this.

final URL url1  = stringToURL("www.link_to_my_page/sample_image1.jpg");

and if i want to use more i will just use it like this.

final URL url1  = stringToURL("www.link_to_my_page/sample_image1.jpg");

final URL url2  = stringToURL("www.link_to_my_page/sample_image2.jpg");

final URL url3  = stringToURL("www.link_to_my_page/sample_image3.jpg");

final URL url4  = stringToURL("www.link_to_my_page/sample_image4.jpg");

final URL url5  = stringToURL("www.link_to_my_page/sample_image5.jpg");

final URL url6  = stringToURL("www.link_to_my_page/sample_image6.jpg");

final URL url7  = stringToURL("www.link_to_my_page/sample_image7.jpg");

final URL url8  = stringToURL("www.link_to_my_page/sample_image8.jpg");

final URL url9  = stringToURL("www.link_to_my_page/sample_image9.jpg");

and then i have an AsyncTask that will process all of that and here it is

private class DownloadTask extends AsyncTask<URL, Integer, ArrayList<image_class>> {

    protected void onPreExecute() {



    }



    protected ArrayList<image_class> doInBackground(URL... urls) {



    }



    protected void onProgressUpdate(Integer... progress) {



    }



    protected void onCancelled() {



    }



    protected void onPostExecute(ArrayList<image_class> result) {



    }

}

and if i want to run my AsyncTask i will call it like this

mMyTask = new DownloadTask().execute(url1);

or for multiple

mMyTask = new DownloadTask().execute(url1,url2,url3,url4,url5,url6,url7,url8,url9);

and now here is my concern. all my links where inside my SQLite Database and what I did so far is create a Cursor Loop them while using stringToURL inside an array then call it like this mMyTask = new DownloadTask().execute(Array_of_Urls.ToString()); but no luck and it gave an errors.

My question is how can call that task using my urls in database?

Here is my current code

on Create Method

load_sync = findViewById(R.id.load_sync);

mProgressAnimation = new ProgressBarAnimation(load_sync, 100);



startMyAsyncTaskWithURList();

and here is the whole code

private ArrayList<URL> getMyURLFromDB() {

    ArrayList<URL> listURL = new ArrayList<>();



    Cursor cursor = Sync.get_image(current_email);

    while (cursor.moveToNext()) {

        String folder = cursor.getString(cursor.getColumnIndex("folder"));

        String urlString = cursor.getString(cursor.getColumnIndex("myimage"));

        String gen_link = "Custom URL" + folder + "/" + urlString;

        Log.e("Link ", "" + gen_link);

        URL url = null;

        try {

            url = new URL(gen_link);

        } catch (MalformedURLException e) {

            e.printStackTrace();

        }

        listURL.add(url);

    }

    return listURL;

}



private class DownloadTask extends AsyncTask<String, Integer, ArrayList<image_class>> {

    protected void onPreExecute() {



    }



    ArrayList<URL> listURL = null;

    public DownloadTask(ArrayList<URL> urls){

        this.listURL = urls;

    }



    protected ArrayList<image_class> doInBackground(String... params) {

        int count = listURL.size();

        HttpURLConnection connection = null;

        ArrayList<image_class> bitmaps = new ArrayList<>();



        for (int i = 0; i < count; i++) {

            URL currentURL = listURL.get(i);

            String fileName = currentURL.toString().substring(currentURL.toString().lastIndexOf('/') + 1);



            try {

                connection = (HttpURLConnection) currentURL.openConnection();

                connection.connect();



                InputStream inputStream = connection.getInputStream();

                BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream);



                Bitmap bmp = BitmapFactory.decodeStream(bufferedInputStream);

                bitmaps.add(new image_class(bmp,fileName));



                publishProgress((int) (((i + 1) / (float) count) * 100));

                if (isCancelled()) {

                    break;

                }



            } catch (IOException e) {

                e.printStackTrace();

            } finally {

                connection.disconnect();

            }



            try {

                Thread.sleep(500);

            } catch (InterruptedException e) {

                e.printStackTrace();

            }

        }



        return bitmaps;



    }



    protected void onProgressUpdate(Integer... progress) {

        mProgressAnimation.setProgress(progress[0]);

    }



    protected void onPostExecute(ArrayList<image_class> result) {

        Iterator itr = result.iterator();

        while(itr.hasNext()){

            image_class st = (image_class) itr.next();

            Bitmap bitmap = st.image;

            saveImageToInternalStorage(bitmap, st.filename);

        }

    }

}



protected Uri saveImageToInternalStorage(Bitmap bitmap, String filename) {

    File file = sdCardDirectory;

    file = new File(file, filename);



    try {

        OutputStream stream = null;

        stream = new FileOutputStream(file);

        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);

        stream.flush();

        stream.close();



    } catch (IOException e) {

        e.printStackTrace();

    }



    Uri savedImageURI = Uri.parse(file.getAbsolutePath());

    return savedImageURI;

}

the image doesnt download or the AsyncTask is not working

This is just a basic outline:

private ArrayList<> getMyURLFromDB(){

    ArrayList<> listURL = new ArrayList<>();



    // You will need to fill in some blanks here...

    //... This is just a basic outline!

    SQLiteDatabase db = dbModel.getReadableDatabase();

    Cursor cursor = db....

    while (cursor.moveToNext()) {

        String urlString = cursor.getString(cursor.getColumnIndex(MY_URL_STRING));

        URL url = new URL(urlString);

        listURL.add(url);

    }

    return listURL;

}

Get the List from the database and pass the ArrayList as a parameter of the AsyncTask:

private void startMyAsyncTaskWithURList(){

    ArrayList<URL> listURL = getMyURLFromDB();

    // Just pass the ArrayList as a parameter

    new DownloadTask(listURL).execute();

}

You need to add a constructor of the AsyncTask that will accept the ArrayListas a parameter:

private class DownloadTask extends AsyncTask<String, Integer, ArrayList<image_class>> {



    ArrayList<URL> listURL = null;

    public DownloadTask(ArrayList<URL> urls){

        this.listURL = urls;    

    }



    protected ArrayList<image_class> doInBackground(String... params) {

        // Now you have access to the list

        if(listURL != null){

        }



    }





    protected void onPostExecute(ArrayList<image_class> result) {



    }

}