oops. forgot to override handleMessage ( ) in the pseudo code above. Let us
assume, that in the handleMessage ( ), we decide which processxyz to call,
depending on the message received !
sorry..
On Wed, Sep 9, 2009 at 3:01 PM, Android Development <indodr...@gmail.com>wrote:
> Hello,
> From the conversation above, i understand that having a static reference to
> the activity can be used by background threads (that we may spawn), to send
> callbacks to the activity (which can then render stuff on the UI).
>
> However, It would be helpful, if someone can also provide an example of
> using Handlers.
>
> For my understanding so far, I am posting some pseudo code below. Please
> feel free to correct me/enhance the code, so that i may understand this
> concept better.
>
> I can create a static handler reference in my activity class like this:
>
> private static MyHandler handler = new MyHandler();
>
> My handler class may have the following structure (assuming that MyHandler
> is an inner class of my Activity class):
>
> public class MyHandler extends Handler
> {
> public void processCallConnectedEvent ( Message m)
> {
> // do stuff here..show a dialog that displays "Call Connected" on
> the Activity's UI
> //sleep here for sometime, say 2 seconds..
> // dismiss the dialog.
> }
>
> public void processCallDisconectedEvent (Message m)
> {
> // Do the needful here, pop a dialog that displays "Call
> Disconnected"
> }
>
> public void processCallTimedOutEvent (Message m)
> {
> // Do the needful here, pop a dialog that displays "Call Attempt
> timed out"
> }
>
> }
>
> On Tue, Sep 1, 2009 at 10:27 PM, Streets Of Boston <
> flyingdutc...@gmail.com> wrote:
>
>>
>> You're welcome :-)
>>
>> And you can make your show/dismissDialogSmart 'static'. Then you never
>> need a reference to an Activity at all. Just call
>> OrientationAwareActivity.showDialogSmart(id)
>>
>>
>> On Aug 31, 5:44 pm, CraigsRace <craig...@gmail.com> wrote:
>> > > I deal with these situations by just keeping a public static reference
>> > > around to the currently active activity. E.g.
>> >
>> > Brilliant idea!!! That's the solution!
>> >
>> > And you could abstract it out into a sub class like this (I wish
>> > showDialog/dismissDialog weren't marked as final!):
>> >
>> > public class OrientationAwareActivity extends Activity {
>> > private static OrientationAwareActivity ACTIVE_INSTANCE;
>> >
>> > @Override
>> > protected void onCreate(Bundle savedInstanceState) {
>> > super.onCreate(savedInstanceState);
>> >
>> > ACTIVE_INSTANCE = this;
>> > }
>> >
>> > @Override
>> > protected void onDestroy() {
>> > super.onDestroy();
>> >
>> > ACTIVE_INSTANCE = null;
>> > }
>> >
>> > public void showDialogSmart(int id) {
>> > if (ACTIVE_INSTANCE != null) {
>> > ACTIVE_INSTANCE.showDialog(id);
>> > }
>> > }
>> >
>> > public void dismissDialogSmart(int id) {
>> > if (ACTIVE_INSTANCE != null) {
>> > ACTIVE_INSTANCE.dismissDialog(id);
>> > }
>> > }
>> >
>> >
>> >
>> > }- Hide quoted text -
>> >
>> > - Show quoted text -
>> >>
>>
>
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