You need to do this from a message queue / looper thread, such as the main thread. Just post a message to the main thread and show your toast from there.
On Wed, Jun 24, 2009 at 12:48 PM, Richard Schilling < richard.rootwirel...@gmail.com> wrote: > > This is somewhat related to > > > http://groups.google.com/group/android-developers/browse_thread/thread/e83f452ae9f307b8/cc1a379efbc27b51?lnk=gst&q=toast+from+a+thread#cc1a379efbc27b51 > > > I have a service running in the background. I have a background > thread that gets a reference to the service from the application's > main activity. But when the background thread calls a method in the > service to display a toast, I get the "Looper not initialized > exception". Why, if I have a valid, bound reference to a Service, > does this still happen? > > > public MyActivity extends Activity{ > > private static MyService service; > > public static MyService getMyService() > > private ServiceConnection sConnection = new ServiceConnection(){ > public void onServiceConnected(ComponentName className, > IBinder > service) { > service = > ((MyService.MyServiceBinder)service).getService(); > } > > public void onServiceDisconnected(ComponentName className) { > service = null; > } > > }; > > > public void onCreate(Bundle savedInstanceState) { > > super.onCreate(savedInstanceState); > > Intent bindIntent = new Intent(this, NomadService.class); > bindService(bindIntent, sConnection, > Context.BIND_AUTO_CREATE); > > > > // start the service. > nomadServiceComponent = startService( > new Intent(this, MyService.class)); > > > new MyThread().start(); > } > > } > > > public class MyService{ > > // normal code for MyService omitted for discussion purposes > > > public void toast(String t){ > Context ctx = getApplicationContext(); > try{ > Toast.makeText(ctx, t, Toast.LENGTH_LONG); > > } catch (Throwable th){ > Log.i("Nomad", th.getMessage()); > th.printStackTrace(); > } > } > > } > > public class MyThread extends Thread{ > > public void run(){ > > > MyService s = MyActivity.getMyService(); > if (s != null) > s.toast("You're toasted."); > // causes this exception to occur: "Can't create > handler inside thread that has not called Looper.prepare()" > } > > } > > > > Richard Schilling > Root Wireless > > > > > > -- Dianne Hackborn Android framework engineer hack...@android.com Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
