[android-developers] Re: Broadcast Receiver From Widget

Dear Henry,

This is result after investigate this problem, i was handler
successful this issue. So i collect as report to share with android
developer. Hope it help

Here is result:
★Issue:
Regarding limited from Widget, when try to register BroadcastReceiver
via explicit source code: (No effect when register BroadcastReceiver
via Manifest.xml)

★Example:
BroadcastReceiver: ACTION_TIME_TICK message is one example:
As docs from Android had point out:
"You can not receive this through components declared in manifests,
only by exlicitly registering for it with
Context.registerReceiver()." (Ref.1)

★Previous solution:
Code Snippet:
context.registerReceiver(this, intentName); (1)

★When implement follow (1), it though exception:
android.content.ReceiverCallNotAllowedException:
IntentReceiver components are not allowed to register to receive
intents

★Good news for anyone who need to register BroadcastReceiver in
Widget :)
we CAN register successful BroadcastReceiver

★Our Solution:
But, We can fixed this by used application context instead of Widget
context(*)
Code Snippet:
context.getApplicationContext.registerReceiver(this, intentName);

★References:
http://developer.android.com/reference/android/content/Intent.html#ACTION_TIME_TICK
Regarding

Regards,
DatNQ

On Dec 3 2009, 12:44 am, Dianne Hackborn <hack...@android.com> wrote:
> Oh and please keep in mind -- app widgets were very deliberately designed to
> work this way because on the vast majority of Android devices there is just
> not nearly enough memory to be able to run at the same time all of the
> widget users have placed on their home screen.  You need to take care in
> your widget implementation that you respect this constraint -- a widget can
> NOT be running all of the time, it must be very carefully designed to run as
> little as possible and only when needed.
>
>
>
> On Wed, Dec 2, 2009 at 9:42 AM, Dianne Hackborn <hack...@android.com> wrote:
> > You simply can not do this.  A BroadcastReceiver component only "lives" for
> > the duration of the call to onReceiveIntent(); it is not allowed to use
> > registerReceiver in it, because by the time you return from that method (at
> > which point you could first receive anything from your register), the
> > component is no longer alive, and the system could kill at any time to
> > reclaim memory.
>
> > On Wed, Dec 2, 2009 at 1:04 AM, Henry S. <stanal...@gmail.com> wrote:
>
> >> Hi,
>
> >> I am making a widget that needs a broadcast receiver, like the one in
> >> com.example.android.apis.appwidget.ExampleBroadcastReceiver.  However,
> >> the example defines Intent.ACTION_TIMEZONE_CHANGED in the manifest,
> >> but there are some that do not allow this
>
> >> For example, Intent.ACTION_TIME_TICK says "You can not receive this
> >> through components declared in manifests, only by exlicitly
> >> registering for it with Context.registerReceiver(). "
>
> >> So I removed the manifest declarations and tried replacing the
> >> AppWidgetProvider.onEnabled function that was in the example with a
> >> call like the following:
> >> context.registerReceiver(myReceiver, new
> >> IntentFilter(Intent.ACTION_TIME_TICK));
>
> >> (where "myReceiver" is an instance of the receiver I want.)  However,
> >> when I try to run the code, I get the following error:
>
> >> Unable to start
> >> receiver...android.content.ReceiverCallNotAllowedException:
> >> IntentReceiver components are not allowed to register to receive
> >> intents
>
> >> Can anyone suggest a way to get this broadcast receiver working from a
> >> widget?
>
> >> Thanks,
> >> Henry
>
> >> --
> >> 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+unsubscribe@googlegroups.com<android-developers%2Bunsubscribe@googlegroups.com>
> >> For more options, visit this group at
> >>http://groups.google.com/group/android-developers?hl=en
>
> > --
> > 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.
>
> --
> 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+unsubscribe@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en