Question

因此，我编写了一个代码，其中警报管理器应在准确的时间触发并每分钟重复一次，并且它部分起作用，第一次触发，但在给定的间隔（一分钟）后不再重复。 / p>

主要活动：

public void SetAlarm()
    {
        final Button button = findViewById(R.id.button); // replace with a button from your own UI
        BroadcastReceiver receiver = new BroadcastReceiver() {
            @Override public void onReceive( Context context, Intent _ )
            {
                Toast.makeText(context, "Nope", Toast.LENGTH_SHORT).show();
                context.unregisterReceiver( this ); // this == BroadcastReceiver, not Activity
            }
        };

        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, 20);
        cal.set(Calendar.MINUTE, 30);
        cal.set(Calendar.SECOND, 0);

        this.registerReceiver( receiver, new IntentFilter("com.blah.blah.somemessage") );

        PendingIntent pintent = PendingIntent.getBroadcast( this, 0, new Intent("com.blah.blah.somemessage"), 0 );
        AlarmManager manager = (AlarmManager)(this.getSystemService( Context.ALARM_SERVICE ));

        // set alarm to fire 5 sec (1000*5) from now (SystemClock.elapsedRealtime())
        manager.setInexactRepeating( AlarmManager.RTC_WAKEUP, cal.getTimeInMillis() + 1000*5, 6000, pintent );
    }

    public void klik(View view) {
        SetAlarm();
    }

}

Answer 1

尝试使用setRepeating()：

manager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
    cal.getTimeInMillis() + 1000*5, 6000, pintent);

有关最佳做法，您可以查看this doc。

Answer 2

为了安全性和电池寿命，我认为以毫秒为单位的最小重复次数是60000（1分钟）

从Android 5.1开始，值将被强制高达60000 ...

Answer 3

如果您的所有主要活动我都不了解。为什么要在SetAlarm（）（（单击时调用SetAlarm））中定义按钮？

我认为您应该尝试一种全新的方式。像这样...

在主活动中的onCreate事件定义按钮：
```
Button btn_yrbnt = findViewById(R.id.btn);
```

为onClick举办活动

btn_yrbnt.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        startAlarm();
    }
});

在startAlarm（）事件中设置警报

Intent intent = new Intent(this, Alarm.class);  //In 4th step u understand it
PendingIntent pendingIntent = PendingIntent.getBroadcast(this.getApplicationContext(), 0, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 8);
calendar.set(Calendar.MINUTE, 10);
calendar.set(Calendar.SECOND, 1);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), REPEAT_TIME, pendingIntent);  //Repeat time is bigger than 60000ms but u can use AlarmManager.INTERVAL_DAY for example or AlarmManager.INTERVAL_FIFTEEN_MINUTES

使用BroadCastReceiver超类创建一个名为Alarm.class的新Java类

public class Alarm extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
     //Type what do u want to do on Alarm's fire!!!!
}}

重要！在清单中应链接接收方

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

如果您做的一切都很好，您的闹钟就可以正常工作！对不起我的英语不好！

警报管理器不会重复吗？

3 个答案: