Question

我正在制作一款Android应用。目的是在预定时间响铃并开启活动。我使用了stackoverflow和其他网站上的几个关于这样做的链接，但是我遇到了一个问题：当我更改TimePicker的时间时，不是设置闹钟，而是设置闹钟并且活动打开。

我希望在更改时间时不打开活动，但只启用闹钟。

这是我的代码：

使用TimePicker的活动：

tp_clock.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {

            public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {

                int alarmHours = tp_clock.getCurrentHour();
                int alarmMinutes = tp_clock.getCurrentMinute();
                Long time = calculateTime(alarmHours, alarmMinutes);

                Toast.makeText(context, "Alarm set", Toast.LENGTH_LONG).show();
                alarmManager.set(AlarmManager.RTC_WAKEUP,time, PendingIntent.getBroadcast(context, 1, intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT));
            }
        });

calculateTime函数：

public Long calculateTime(int alarmHours, int alarmMinutes)
    {
        Calendar c = Calendar.getInstance();

        int currentHours = c.get(Calendar.HOUR);
        if (c.get(Calendar.AM_PM) == 1)
            currentHours +=12;
        int currentMinutes = c.get(Calendar.MINUTE);

        int setAlarmHours = 0;
        int setAlarmMinutes = 0;
        int balanceWithMinute = 0;

        if (alarmMinutes >= currentMinutes)
        {
            setAlarmMinutes = alarmMinutes - currentMinutes;
        }
        else
        {
            setAlarmMinutes = (60 - currentMinutes) + alarmMinutes;
            balanceWithMinute = 1;
        }

        if (alarmHours > currentHours)
            setAlarmHours = alarmHours - currentHours;

        if (alarmHours < currentHours)
            setAlarmHours = (24 - currentHours) +alarmHours - balanceWithMinute;

        if (alarmHours == currentHours && balanceWithMinute == 1)
            setAlarmHours = 23;

        Long time = new GregorianCalendar().getTimeInMillis()+setAlarmHours*setAlarmMinutes*60*1000;
        return time;
    }

alarmReciever代码：

public class AlarmReciever extends BroadcastReceiver
{
    private String userToken;
    private String userId;

    @Override
    public void onReceive(Context context, Intent intent)
    {
        Intent i=new Intent(context, PlanASoundActivity.class);
        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        userToken = intent.getStringExtra(LoginActivity.USER_TOKEN);
        userId = intent.getStringExtra(LoginActivity.USER_ID);

        i.putExtra(LoginActivity.USER_TOKEN, userToken);
        i.putExtra(LoginActivity.USER_ID, userId);
        context.startActivity(i);

        Toast.makeText(context, "Alarm triggered", Toast.LENGTH_LONG).show();

    }

这个函数是我在AlarmReciever类中定义的唯一函数。

Answer 1

您正在拨打

alarmManager.set(AlarmManager.RTC_WAKEUP,time, PendingIntent.getBroadcast(context, 1, intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT));

在onTimeChanged侦听器中。这就是每次更改TimePicker时间时启动的原因。

您最好在视图中添加一个按钮，然后实施onClickListener，您将从TimePicker中选择时间并在那里进行调用。

Android：如何使用警报管理器打开活动？

1 个答案: