警报触发次数过多

Question

以前，此代码已与WakeFulBroadcast接收器正常工作，并以此为基础。只是试图设置一个每天在同一时间运行一项服务的警报，如果重新启动设备，该警报将重新启动。

相反，它大约每30-50分钟运行一次，看似随机运行。

MyReceiver.java

@Override
public void onReceive(Context context, Intent intent) {
    if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
        scheduleAlarms(context);
    }       
}

static void scheduleAlarms(Context context) {

    AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(context, MyService.class);

    PendingIntent scheduledIntent = PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

    if (am != null) {
        am.cancel(scheduledIntent);
    }

    Calendar calendar = Calendar.getInstance();

    calendar.setTimeInMillis(System.currentTimeMillis());

    // if it's after or equal to desired time, then schedule for the next day

   // also tried:
   // if (Calendar.getInstance().get(Calendar.HOUR_OF_DAY) >= 8) {

    if (calendar.get(Calendar.HOUR_OF_DAY) >= 8) {
        calendar.add(Calendar.DAY_OF_YEAR, 1); // add, not set!
    } else {
        //Alarm will schedule for today
    }

    calendar.set(Calendar.HOUR_OF_DAY, 8);
    calendar.set(Calendar.MINUTE, 0);
    calendar.set(Calendar.SECOND, 0);

    am.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, scheduledIntent);

}

MyService.java

 @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        sendNotification(getApplicationContext());
        return super.onStartCommand(intent, flags, startId);
    }

MainActivity.java

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // SharedPreferences boolean that I've omitted
        if (!runOnce) {
            Log.d("main activity", "First time running app");
            editor.putBoolean(RUN_ONCE, true);
            editor.commit();

            MyReceiver.scheduleAlarms(getApplicationContext());

        }

}

Manifest.xml

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

。 。

   <receiver
        android:name=".MyReceiver"
        android:enabled="true"
        android:exported="true">

        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED"></action>
        </intent-filter>

    </receiver>