从我的应用程序设置警报

Question

我想从我的应用程序中创建一个警报对象。我正在编写一个待办事项应用程序，它可以选择在手机上设置闹钟。

我想设置日期和时间以及闹钟的标签。

Calendar c = Calendar.getInstance();
c.setTimeInMillis(System.currentTimeMillis());
        c.clear();
        c.set(Calendar.YEAR, mYear);
        c.set(Calendar.MONTH, mMonth);
        c.set(Calendar.DAY_OF_MONTH, mDay);
        c.set(Calendar.HOUR, mHour);
        c.set(Calendar.MINUTE, mMinute);
        Intent activate = new Intent(this, alaram.class);
        AlarmManager alarams ;
        PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, activate, 0);
        alarams = (AlarmManager) getSystemService(this.ALARM_SERVICE);
        alarams.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), alarmIntent);

我尝试使用上面的代码来设置警报，但我无法做到。我也没有收到任何错误:(

Answer 1

正如@stealthcopter 所说，AlarmManager 用于发出警报，您的应用程序可以捕获然后执行某些操作。这是我从其他帖子、教程和我所做的工作中汇总的一个小示例。

Main.java

Intent i = new Intent(this, OnAlarmReceiver.class);
PendingIntent pi = PendingIntent.getBroadcast(this, 0, i,
                                                     PendingIntent.FLAG_ONE_SHOT);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.SECOND, calendar.get(Calendar.SECOND) + 10);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pi);

OnAlarmReceiver.java

public class OnAlarmReceiver extends BroadcastReceiver{

@Override
public void onReceive(Context context, Intent intent) {
    WakeIntentService.acquireStaticLock(context);
    Intent i = new Intent(context, AlarmService.class);
    context.startService(i);
}}

WakeIntentService.java

public abstract class WakeIntentService extends IntentService {

    abstract void doReminderWork(Intent intent);

    public static final String LOCK_NAME_STATIC = "com.android.voodootv.static";
    private static PowerManager.WakeLock lockStatic = null;

    public static void acquireStaticLock(Context context) {
        getLock(context).acquire();
    }

    synchronized private static PowerManager.WakeLock getLock(Context context) {
        if (lockStatic == null) {
            PowerManager powManager = (PowerManager) context
                    .getSystemService(Context.POWER_SERVICE);
            lockStatic = powManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,
                    LOCK_NAME_STATIC);
            lockStatic.setReferenceCounted(true);
        }
        return (lockStatic);
    }

    public WakeIntentService(String name) {
        super(name);
    }

    @Override
    final protected void onHandleIntent(Intent intent) {
        try {
            doReminderWork(intent);
        } finally {
            getLock(this).release();
        }
    }}

AlarmService.java

public class AlarmService extends WakeIntentService {

    public AlarmService() {
        super("AlarmService");
    }

    @Override
    void doReminderWork(Intent intent) {
        NotificationManager manager = (NotificationManager)
                getSystemService(NOTIFICATION_SERVICE);
        Intent notificationIntent = new Intent(this, Main.class);
        PendingIntent pi = PendingIntent.getActivity(this, 0,
                notificationIntent, PendingIntent.FLAG_ONE_SHOT);
        Notification note = new Notification(R.drawable.icon, "Alarm",
                System.currentTimeMillis());
        note.setLatestEventInfo(this, "Title", "Text", pi);
        note.defaults |= Notification.DEFAULT_ALL;
        note.flags |= Notification.FLAG_AUTO_CANCEL;
        int id = 123456789;
        manager.notify(id, note);
    }
}

此示例将在 10 秒后在状态栏上创建通知。

希望对你有帮助。

这里也是第一次发帖:)

哦，差点忘了，

AndroidManifest.xml

<receiver android:name="com.android.alarmmanagertest.OnAlarmReceiver" />
<service android:name="com.android.alarmmanagertest.AlarmService" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.VIBRATE" />

Answer 2

这是工作代码：

添加到 Manifest.xml：

...
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
...
<receiver  android:process=":remote" android:name="Alarm"></receiver>
...

代码：

public class Alarm extends BroadcastReceiver 
{    
     @Override
     public void onReceive(Context context, Intent intent) 
     {   
         PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
         PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "My Tag");
         wl.acquire();

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

         wl.release();
     }

     public void SetAlarm(Context context)
     {
         AlarmManager am=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
         Intent i = new Intent(context, Alarm.class);
         PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0);
         am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * 60 * 10, pi);
     }

     public void CancelAlarm(Context context)
     {
         Intent intent = new Intent(context, Alarm.class);
         PendingIntent sender = PendingIntent.getBroadcast(context, 0, intent, 0);
         AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
         alarmManager.cancel(sender);
     }
}