After reading the Handler documentation, I got the clarification: because mUpdateResults Thread will run on the thread to which this handler is attached whereas new Thread will run on another thread other than the UI thread. Is this correct?
On Nov 12, 11:05 am, "indiabolbol.com" <[EMAIL PROTECTED]> wrote: > Below is a snippet from > googlehttp://code.google.com/android/kb/commontasks.html#threading > > public class MyActivity extends Activity { > > [ . . . ] > // Need handler for callbacks to the UI thread > final Handler mHandler = new Handler(); > > // Create runnable for posting > final Runnable mUpdateResults = new Runnable() { > public void run() { > updateResultsInUi(); > } > }; > > @Override > protected void onCreate(Bundle icicle) { > super.onCreate(icicle); > > [ . . . ] > } > > protected void startLongRunningOperation() { > > // Fire off a thread to do some work that we shouldn't do > directly in the UI thread > Thread t = new Thread() { > public void run() { > mResults = doSomethingExpensive(); > mHandler.post(mUpdateResults); > } > }; > t.start(); > } > > private void updateResultsInUi() { > > // Back in the UI thread -- update our UI elements based on > the data in mResults > [ . . . ] > }} > > As per the best practice, we are supposed to update UI components via > handler as shown above. > > My question, the Runable thread mUpdateResults can update UI directly > but not the thread created in startLongRunningOperation.. > For eg. can we rewrite the code as follows: > > protected void startLongRunningOperation() { > > // Fire off a thread to do some work that we shouldn't do > directly in the UI thread > Thread t = new Thread() { > public void run() { > mResults = doSomethingExpensive(); > updateResultsInUi(); // updating UI here..... > } > }; > t.start(); > } --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
