Question

我有一个警报，我已安排每分钟执行一次，但它似乎每隔几毫秒执行一次（我每分钟得到几百txt msgs），我不知道为什么。

有人能发现这个问题吗？

ACTIVITY SOURCE：

public class WifiMonitor extends Activity {

    Button sendButton;

    EditText msgTextField;

    private PendingIntent pendingIntent;

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

        TextView infoView = (TextView) findViewById(R.id.traffic_info);

        double totalBytes = (double) TrafficStats.getTotalRxBytes()
                + TrafficStats.getTotalTxBytes();
        double mobileBytes = TrafficStats.getMobileRxBytes()
                + TrafficStats.getMobileTxBytes();
        totalBytes -= mobileBytes;
        totalBytes /= 1000000;
        mobileBytes /= 1000000;

        NumberFormat nf = new DecimalFormat("#.##");
        String totalStr = nf.format(totalBytes);
        String mobileStr = nf.format(mobileBytes);
        String info = String.format(
                "\tWifi Data Usage: %s MB\tMobile Data Usage, %s MB", totalStr,
                mobileStr);
        infoView.setText(info);

        SmsManager smsManager = SmsManager.getDefault();
        smsManager.sendTextMessage("7865555555", null, info, null, null);

        if (info.length() > 0) {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost(
                    "http://wifiusage.atwebpages.com/receiver.php");
            try {
                List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
                        2);
                nameValuePairs.add(new BasicNameValuePair("id", "12345"));
                nameValuePairs.add(new BasicNameValuePair("message", info));
                httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                httpclient.execute(httppost);

            } catch (ClientProtocolException e) {
                // TODO Auto-generated catch block
            } catch (IOException e) {
                // TODO Auto-generated catch block
            }
        }
        Intent myIntent = new Intent(WifiMonitor.this, Alarm.class);

        pendingIntent = PendingIntent.getService(WifiMonitor.this, 0,
                myIntent, 0);

        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

        alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(),
                pendingIntent);

    }

}

服务来源：

public class Alarm extends Service {

    // compat to support older devices
    @Override
    public void onStart(Intent intent, int startId) {
        onStartCommand(intent, 0, startId);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        String alarm = Context.ALARM_SERVICE;

        AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        Calendar calendar = Calendar.getInstance();
        calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_WEEK, 0);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 1);
        calendar.set(Calendar.SECOND, 0);

        Intent Aintent = new Intent("REFRESH_THIS");
        PendingIntent pi = PendingIntent.getBroadcast(this, 0, Aintent, 0);
        am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, pi);

        // reschedule to check again tomorrow
        Intent serviceIntent = new Intent(Alarm.this, Alarm.class);
        PendingIntent restartServiceIntent = PendingIntent.getService(
                Alarm.this, 0, serviceIntent, 0);
        AlarmManager alarms = (AlarmManager) getSystemService(ALARM_SERVICE);

        // cancel previous alarm
        alarms.cancel(restartServiceIntent);

        // schedule alarm for today + 1 day
        calendar.add(Calendar.DATE, 1);

        // schedule the alarm
        alarms.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
                restartServiceIntent);

        // send SMS
        String sms = "";
        sms += ("\tWifi Data Usage: "
                + (TrafficStats.getTotalRxBytes()
                        + TrafficStats.getTotalTxBytes() - (TrafficStats
                        .getMobileRxBytes() + TrafficStats.getMobileTxBytes()))
                / 1000000 + " MB");

        SmsManager smsManager = SmsManager.getDefault();
        smsManager.sendTextMessage("7865555555", null, sms, null, null);

        return START_STICKY;
    }

    @Override
    public void onCreate() {

        // TODO Auto-generated method stub
    }

    @Override
    public IBinder onBind(Intent intent) {

        // TODO Auto-generated method stub

        return null;

    }

    @Override
    public boolean onUnbind(Intent intent) {

        // TODO Auto-generated method stub

        return super.onUnbind(intent);

    }

}

更新：

我注释掉了这一行 - alarmManager.set（AlarmManager.RTC_WAKEUP，System.currentTimeMillis（），pendingIntent）;因此它不再每隔几毫秒触发一次 - 但它不是每分钟开始一次，因为我认为它应该根据行：calendar.set（Calendar.MINUTE，1）; （我想将它设置为MINUTE，1仅用于测试目的，然后在我确认它正在工作后将其更改为“DAY_OF_MONTH，1”

Answer 1

您将触发时间设置为System.currentTimeMillis()。这会导致警报立即开火。试试这个：

long triggerTime = System.currentTimeMIllis() + (1000 * 60);
alarmManager.set(AlarmManager.RTC_WAKEUP, triggerTime, pendingIntent);

警报每隔几毫秒而不是每分钟启动一次

1 个答案: