How to correctly use parameters passed to an android thread?

Question

I have an external .hash file which I tired reading as a simple remote text file:

private class getHash extends AsyncTask<String, Void, String>{
    @Override
    protected String doInBackground(String... params) {
        String str = null;
        try {
            // Create a URL for the desired page
            URL url = new URL(params[0]);

            // Read all the text returned by the server
            InputStream is =  url.openStream();//The line it crashes on
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader in = new BufferedReader(isr);
            str = in.readLine();
            in.close();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str;
    }
    @Override
    protected void onPostExecute(String result) {
        hash = result;
    }
}

Then I call the thread :

getHash hashThread =  new getHash();
hashThread.execute(new String[]{"http://www......................hash"});

During execution of the noted line in the class all stops are pulled and I get slapped by the classy Source not found crash.

LogCat gives this error:

W/dalvikvm(724): threadid=1: thread exiting with uncaught exception (group=0x40a13300)

Answer 1

Are you running this in debug mode or regular mode? The source not found message would seem to indicate you are trying to step into code that has no source attached for it.

Also have you added <uses-permission android:name="android.permission.INTERNET" /> to your AndroidManifest.xml ?