Question

我正在测试AlarmManager以便在我的应用中使用，当我希望它在1分钟后启动时，它会立即触发我的广播接收器。代码如下：

public class SetMealTimersActivity extends Activity {
    PendingIntent pi;
    BroadcastReceiver br;
    AlarmManager am;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_set_meal_timers);

        br = new BroadcastReceiver() {
            @Override
            public void onReceive(Context c, Intent i) {
                Toast.makeText(c, "Ready to Go!", Toast.LENGTH_LONG).show();
            }
        };
        registerReceiver(br, new IntentFilter("com.ian.mealtimer"));
        pi = PendingIntent.getBroadcast(this, 0, new Intent(
                "com.ian.mealtimer"), 0);
        am = (AlarmManager) (this.getSystemService(Context.ALARM_SERVICE));         
        am.set( AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime() + 
                60 * 1000, pi );
    }

Answer 1

尝试：

  am.set(AlarmManager.RTC_WAKEUP, 
      Calendar.getInstance().getTimeInMillis()+60*1000, pendingIntent);

它对我有用。

Answer 2

如果使用确切的警报，请确保现在是将来。否则它将立即触发。

Answer 3

尝试将SystemClock.elapsedRealtime()更改为System.currentTimeMillis()，将AlarmManager.ELAPSED_REALTIME_WAKEUP更改为AlarmManager.RTC_WAKEUP。

Answer 4

如果您使用Android API＆gt;尝试使用AlarmManager.setExact(int, long, PendingIntent) 18或用API编译＆lt; 19，因为这种方法的时间管理随API 19而改变。也许这有所帮助。有关详细信息，请阅读documentation。

Answer 5

为id制作pendingIntent

pendingIntent = PendingIntent.getActivity(this, 999123266,
    intent, PendingIntent.FLAG_UPDATE_CURRENT);

所有示例

public void setAlarm_sat(int dayOfWeek1) {
    cal1.set(Calendar.DAY_OF_WEEK, dayOfWeek);
    Intent intent = new Intent(this, RemmemberActivity.class);
    pendingIntent = PendingIntent.getActivity(this, 999123266,
        intent, PendingIntent.FLAG_UPDATE_CURRENT);

    Long alarmTime = cal1.getTimeInMillis();
    AlarmManager am = (AlarmManager) getSystemService(Activity.ALARM_SERVICE);
    am.setRepeating(AlarmManager.RTC_WAKEUP, 
                    alarmTime,7*24 * 60 * 60 * 1000, 
                    pendingIntent);
    // am.set(AlarmManager.RTC, cal1.getTimeInMillis(), pendingIntent);
}

AlarmManager警报立即触发

5 个答案: