即使重新启动后没有启动应用程序，我仍然可以拥有BOOT_COMPLETED吗？

Question

So let's say my receivers and service are correct, will the BOOT_COMPLETED still run even after I reboot the device and I won't open/launch it (the app) for the first time? Then the alarm works when its due date and time?

NOTE : I do not try to launch the app after the reboot.

this is my manifest

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" android:persistent="true">
  <receiver android:name="com.majimechibireminder2.OnBootReceiver" >
     <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
        <category android:name="android.intent.category.HOME" />
     </intent-filter>
 </receiver>

  <receiver android:name=".AlarmReceiver"></receiver>
   <service android:name=".ChibiReminderService" >
 </service>
   <activity android:name=".ChibiRemind"></activity>
</application>

If not, could you suggest me some proper code to work on those my ideals.

Answer 1

Your app needs to be lanuched at least once after it was installed to phone to make it able to receive broadcasts. If you are working with alarms you don't need to worry about it because the user will need to open app to set particular alarm.

When the phone gets turned off, alarms will go off. After reboot is completed your app will receive BootCompleted action. No need to launch app after reboot.

If the user doesn't open your app after it has being installed it means he/she didn't set any alarms. Therefore, no need to worry about reboot for such cases as there is nothing to reset after reboot.

Update:

Try adding attribute android:enabled="true" to your receiver. Final code should look something like this:

<receiver android:name=".OnBootReceiver" android:enabled="true">
    <intent-filter>
        <action android:name="android.intent.action.BOOT_COMPLETED" />
    </intent-filter>
</receiver>

Answer 2

Alarms set by AlarmManager will be lost after a reboot (without any additional manipulation).

This is one area where JobScheduler APIs comes to the rescue. They are not lost after reboots if you set them to persist after reboots.