Don't use the alarm manager for this kind of thing. The best thing is to
use Handler with delayed messages.
And Timer works fine, the problem is that a Timer runs in a separate thread,
and so you are trying to modify a view owned by another thread (the main
thread that originally created it).
On Tue, Dec 9, 2008 at 1:11 PM, Mark K <[EMAIL PROTECTED]> wrote:
>
>
> Try using the alarm service or use a hanlder with postDelayed ().
> J2SE things may be supported in Android, but you don't always get the
> same result, particularly with issues involving threads.
>
>
> M
> On Dec 8, 7:45 pm, Xiongzh <[EMAIL PROTECTED]> wrote:
> > Hi,
> >
> > I was going to update the 'hello world' message in a edit text box by
> > java.util.Timer.
> > But it did not work as in a simple Java application.
> > Maybe the way in Android is to put the timer in a service.
> > But I'll like to know the reason: why does java.util.Timer not make
> > sense in Activity?
> >
> > Thank you in advance.
> >
> > package com.example.android.helloactivity;
> >
> > import java.util.Timer;
> > import java.util.TimerTask;
> >
> > import android.app.Activity;
> > import android.os.Bundle;
> > import android.widget.EditText;
> >
> > /**
> > * A minimal "Hello, World!" application.
> > */
> > public class HelloActivity extends Activity {
> >
> > private Timer helloTimer = new Timer();
> > int seq = 0;
> >
> > public HelloActivity() {
> > }
> >
> > @Override
> > protected void onResume() {
> > sayHelloWorld();
> > helloTimer.schedule(new TimerTask() {
> >
> > @Override
> > public void run() {
> > System.out.println("timer run");
> > sayHelloWorld();
> > }
> >
> > }, 3000, 1000);
> > super.onResume();
> > }
> >
> > @Override
> > protected void onPause() {
> > helloTimer.cancel();
> > super.onPause();
> > }
> >
> > private void sayHelloWorld() {
> > EditText helloEditText =
> (EditText)findViewById(R.id.text);
> > helloEditText.setText("Hello world " + (++seq));
> > helloEditText.invalidate();
> > }
> >
> > /**
> > * Called with the activity is first created.
> > */
> > @Override
> > public void onCreate(Bundle savedInstanceState) {
> > super.onCreate(savedInstanceState);
> >
> > // Set the layout for this activity. You can find it
> > // in res/layout/hello_activity.xml
> > setContentView(R.layout.hello_activity);
> > }
> >
> >
> >
> > }- Hide quoted text -
> >
> > - Show quoted text -
> >
>
--
Dianne Hackborn
Android framework engineer
[EMAIL PROTECTED]
Note: please don't send private questions to me, as I don't have time to
provide private support. All such questions should be posted on public
forums, where I and others can see and answer them.
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