Databases
StackOverflow2013
Postsdbo
POAndroid - Efficient way to pass event notifications to activity that may not be active?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAndroid - Efficient way to pass event notifications to activity that may not be active?
    primarykey
    data
    text
    <p>I have a complex app that has background threads (that could be in a service) which, when they receive data from the internet, need to notify my main display activity (to update on of several status indicators). All run in the same process (I see no reason to do otherwise).</p> <p>However, in some circumstances, these events are frequent - 5 per second. Also, the events may occur when the activity is not-visible or even destroyed. I think the only thing novel about this question is the issue of efficiency. I still target the G1, for example.</p> <p>There are a number of methods mentioned in <a href="https://stackoverflow.com/questions/4111398/android-notify-activity-from-service">this thread</a>, but I don't know which of these are efficient enough, and will work if the activity is destroyed. Those methods are the "Android way" which I would prefer to follow.</p> <p>I have three ugly anti-Android ways that work, but they also have drawbacks:</p> <ol> <li>Have a thread in the activity that is waits on a semaphore, and when released, does the update. Disadvantages: extra thread, how to handle several event types</li> <li>Like #1, but use a concurrent blocking queue object. Disadvantages: extra thread, same type of event may end up in the queue multiple times (not good)</li> <li>Keep a static reference to a handler on the activity, and use that to run an updater. Disadvantages: (a) may leak a reference to the activity? (b) what happens when the activity changes state? (c) multiple runnables could end up there when only one is needed.</li> </ol>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USCommunity
    1. USMesocyclone
    plurals
    1. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POAndroid - Efficient way to pass event notifications to activity that may not be active?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POAndroid - Efficient way to pass event notifications to activity that may not be active?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POAndroid - Efficient way to pass event notifications to activity that may not be active?
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload