Android: How to work with background thread?

Question

I developed an application that receives content from the Internet and displays it accordingly on the device’s screen. The program works just fine, a little slower. Downloading and displaying content takes about 3-4 seconds. I would like to put all the code that extracts the content and displays it in the background thread, and while the program performs these functions, I would like to display a progress dialog. could you help me? I would especially like to know how to put code in a background thread.

MY CODE

public class Activity1 extends Activity { private ProgressDialog progressDialog; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); new AsyncTask<Integer, Integer, Boolean>() { ProgressDialog progressDialog; @Override protected void onPreExecute() { /* * This is executed on UI thread before doInBackground(). It is * the perfect place to show the progress dialog. */ progressDialog = ProgressDialog.show(Activity1.this, "", "Loading..."); } @Override protected Boolean doInBackground(Integer... params) { if (params == null) { return false; } try { /* * This is run on a background thread, so we can sleep here * or do whatever we want without blocking UI thread. A more * advanced use would download chunks of fixed size and call * publishProgress(); */ Thread.sleep(params[0]); // HERE I'VE PUT ALL THE FUNCTIONS THAT WORK FOR ME } catch (Exception e) { Log.e("tag", e.getMessage()); /* * The task failed */ return false; } /* * The task succeeded */ return true; } @Override protected void onPostExecute(Boolean result) { progressDialog.dismiss(); /* * Update here your view objects with content from download. It * is save to dismiss dialogs, update views, etc., since we are * working on UI thread. */ AlertDialog.Builder b = new AlertDialog.Builder(Activity1.this); b.setTitle(android.R.string.dialog_alert_title); if (result) { b.setMessage("Download succeeded"); } else { b.setMessage("Download failed"); } b.setPositiveButton(getString(android.R.string.ok), new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dlg, int arg1) { dlg.dismiss(); } }); b.create().show(); } }.execute(2000); new Thread() { @Override public void run() { // dismiss the progressdialog progressDialog.dismiss(); } }.start(); } } 

Answer 1

Check out ASyncTask , specially created for such tasks.

Answer 2

 public Runnable NameOfRunnable = new Runnable() { @Override public void run() { while (true) { // TODO add code to refresh in background try { Thread.sleep(1000);// sleeps 1 second } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }; 

now run this with

  Thread name = new Thread(NameOfRunnable); name.start(); 

Answer 3

How to work with Background Thread .

Note:

Do not work with the user interface with this background thread .

 AsyncTask.execute(new Runnable() { @Override public void run() { //TODO background code } }); 

Hope this helps you.