Getting android.intent.action.TIME_SET twice when manually change time

Question

I have a BroadcastReceiver which watches android.intent.action.BOOT_COMPLETED, android.intent.action.TIME_SET and android.intent.action.TIMEZONE_CHANGED.

<receiver android:name="SystemBroadcastReceiver">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            <action android:name="android.intent.action.TIME_SET" />
            <action android:name="android.intent.action.TIMEZONE_CHANGED" />
            <category android:name="android.intent.category.HOME" />
        </intent-filter>
</receiver>

/** not true, see below Whenever one of these actions happens, the receiver will open an activity. All work well except when I change the minute part of the clock, the android.intent.action.TIME_SET will activate twice, which leads to the activity opening twice.
I find it is strange because if I change the hour part of the clock, android.intent.action.TIME_SET will activate only once. */ My test phone is Galaxy Nexus with 4.2.1. Is this a system bug in 4.2.1 or have I done something wrong?

-----------edit by myself------------ Here is some logs that may helps. Whenever I change the minute, the hour or the date, my activity will launch twice.

02-01 21:16:11.781: D/SystemClock(9012): Setting time of day to sec=1359724560
02-01 21:16:00.023: V/AlarmClock(8932): AlarmInitReceiver finished
02-01 21:16:00.031: D/SystemClock(9012): Setting time of day to sec=1359724560

I do't know why I just change the time in the system settings part once, but the system call the setting time twice.

Answer 1

Verified this behavior on my own Nexus.

However, you should not start an Activity from a BroadcastReceiver. I recommend that you use Notifications!

This way it does not matter if you get the Broadcast twice, because the notification will only update, but not duplicate.