Question

I want to download and save pdf file to internal storage. Here is code that i am using:

I am calling my method from other class:

new Thread(new Runnable() {
    public void run() {

        new Main().downloadPdfContent("http://people.opera.com/howcome/2005/ala/sample.pdf");

    }
  }).start();

Method look like this:

public void downloadPdfContent(String urlToDownload){

    URLConnection urlConnection = null;

    try{

        URL url = new URL(urlToDownload);

        //Opening connection of currrent url

        urlConnection = url.openConnection();
        urlConnection.connect();

        //int lenghtOfFile = urlConnection.getContentLength();


    String PATH = Environment.getExternalStorageDirectory() + "/1/";

    File file = new File(PATH);
    file.mkdirs();
    File outputFile = new File(file, "test.pdf");
    FileOutputStream fos = new FileOutputStream(outputFile);

    InputStream is = url.openStream();


    byte[] buffer = new byte[1024];

    int len1 = 0;

    while ((len1 = is.read(buffer)) != -1) {
        fos.write(buffer, 0, len1);
    }

    fos.close();
    is.close();

   System.out.println("--pdf downloaded--ok--"+urlToDownload);

    }catch (Exception e) {
        // TODO: handle exception
        e.printStackTrace();

    }

}

I found link of pdf on the web:
http://people.opera.com/howcome/2005/ala/sample.pdf

However i get an exception on this line:

urlConnection.connect();

Exception:
java.net.UnknownHostException: people.opera.com

I can’t figure out what’s wrong. Maybe someone could take a look.

Thanks.

Answer 1

Put

    <uses-permission android:name="android.permission.INTERNET"/>

in your AndroidManifest.xml