Why is Android ContentObserver's onChange() not getting called?

Question

I am trying to create a ContentObserver that will inform me when an SMS is sent from my device. When I use the following my onChange() gets called:

public static final Uri uriSMS = Uri.parse("content://sms");

However, when I try to limit it to just sent SMS messages using this:

public static final Uri uriSMS = Uri.parse("content://sms/sent");

it does not work; the onChange() method simply doesn't get called. Can anyone help me troubleshoot this?

score 2 · Accepted Answer · edited May 11 '13 at 04:42

2

Use

public static final Uri uriSMS = Uri.parse("content://sms");

and check the type of the cursor

Here is an example code.

edited May 11 '13 at 04:42

Lucifer

answered May 11 '13 at 04:28

stinepike

I have seen other SO questions where people were using content://sms/sent. Is that no longer supported? – gonzobrains May 11 '13 at 04:48
I think I saw that sample during my research but haven't tried it yet. I will report back here after I have tested it. Thanks. – gonzobrains May 11 '13 at 04:49
it appears to get called now, but it is called multiple times. Why is this? I only want to handle it once, so how can I narrow down my test in the onChange() event so that I'm not processing it multiple times? – gonzobrains May 14 '13 at 00:22
have you unregistered the observer? – stinepike May 14 '13 at 11:13
also check that .. http://stackoverflow.com/questions/6026547/android-content-observers-onchange-method-is-called-multiple-times – stinepike May 14 '13 at 11:15
I unregister it in onDestroy(). – gonzobrains May 14 '13 at 13:30
a normal solution is to use a timer. Check the time interval between 2 call. If the interval is too short then do not perform the operation – stinepike May 14 '13 at 14:05

1 Answers1