Question

我通过以下代码

设置闹钟

    AlarmManager alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
    Intent alarmReceiverIntent = new Intent(context, AlarmReceiver.class);
    PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0, alarmReceiverIntent, 0);


    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.set(Calendar.HOUR_OF_DAY, 14);

    alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
            AlarmManager.INTERVAL_DAY, alarmIntent);

将此代码放入onCreate是否正确？

因为，当我一次又一次打开我的应用程序时，相同的代码会多次运行，代码是否会覆盖自己？或创建多个警报指定的时间？

感谢。

Answer 1

将此代码放入函数中，当您想设置闹钟然后调用该函数

private void setAlarm()
{

    AlarmManager alarmMgr =
    (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
    Intent alarmReceiverIntent = new Intent(context, AlarmReceiver.class);
    PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0,
    alarmReceiverIntent, 0);


    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.set(Calendar.HOUR_OF_DAY, 14);

    alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
    AlarmManager.INTERVAL_DAY, alarmIntent);

}

Answer 2

try this code:
public class MainActivity extends Activity {

    TimePicker myTimePicker;
    Button buttonstartSetDialog;
    TextView textAlarmPrompt;
    TimePickerDialog timePickerDialog;

    final static int RQS_1 = 1;

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

        textAlarmPrompt = (TextView) findViewById(R.id.alarmprompt);

        buttonstartSetDialog = (Button) findViewById(R.id.startAlaram);
        buttonstartSetDialog.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                textAlarmPrompt.setText("");
                openTimePickerDialog(false);

            }
        });

    }

    private void openTimePickerDialog(boolean is24r) {
        Calendar calendar = Calendar.getInstance();

        timePickerDialog = new TimePickerDialog(MainActivity.this,
                onTimeSetListener, calendar.get(Calendar.HOUR_OF_DAY),
                calendar.get(Calendar.MINUTE), is24r);
        timePickerDialog.setTitle("Set Alarm Time");

        timePickerDialog.show();

    }

    OnTimeSetListener onTimeSetListener = new OnTimeSetListener() {

        @Override
        public void onTimeSet(TimePicker view, int hourOfDay, int minute) {

            Calendar calNow = Calendar.getInstance();
            Calendar calSet = (Calendar) calNow.clone();

            calSet.set(Calendar.HOUR_OF_DAY, hourOfDay);
            calSet.set(Calendar.MINUTE, minute);
            calSet.set(Calendar.SECOND, 0);
            calSet.set(Calendar.MILLISECOND, 0);

            if (calSet.compareTo(calNow) <= 0) {
                // Today Set time passed, count to tomorrow
                calSet.add(Calendar.DATE, 1);
            }

            setAlarm(calSet);
        }
    };

    private void setAlarm(Calendar targetCal) {

        textAlarmPrompt.setText("\n\n***\n" + "Alarm is set "
                + targetCal.getTime() + "\n" + "***\n");

        Intent intent = new Intent(getBaseContext(), AlarmReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(
                getBaseContext(), RQS_1, intent, 0);
        AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, targetCal.getTimeInMillis(),
                pendingIntent);

    }  
}

android ::在哪里设置闹钟（在onCreate或不onCreate）

2 个答案: